Answers
Answer:
What are relatively rare are crystals of a size visible to the naked eye, and also showing most of the faces that reveal the internal symmetry of their atomic pattern.
Explanation:
Being crystalline, i.e. having a regularly repeated three-dimensional atomic pattern, does not mean that a mineral necessarily formed under conditions where it could nucleate (i.e. assemble as the tiny cluster of atoms that is the “seed” of a single crystal) and keep growing large flat faces until a regular shape becomes visible to the observer.
To a crystallographer who can seek proof of internal atomic order by X-ray diffraction, the actual size of a solid made of highly ordered matter is irrelevant. Specific techniques (variants of X-ray diffraction methods, or polarizing microscopy) can reveal that a solid material is made of a single crystal (i.e. a uniform atomic pattern is repeated in the same orientation anywhere throughout the solid) or consists of many crystals (the same pattern occurs, but it is oriented differently in what are considered individual crystals regardless of their individual shape or size).
For precision, a crystallographer or a mineralogist will use terms such as “monocrystalline” (the atomic pattern has a single orientation throughout the entire specimen, regardless of shape and size) and “polycrystalline” (the specimen is an aggregate, or collection, of “domains” or “grains” in which the atomic pattern is in an orientation different from its neighbours).
A perfect single crystal of quartz, broken in several chunks, doesn’t lose its internal atomic pattern, only its external “habit” (the overall shape imparted by the flat faces that grew, layer by layer, along directions controlled by the rate of addition to the atomic pattern). Each individual broken chip of quartz is considered “monocrystalline” by the mineralogist, even if none ofo them is the whole original crystal.
Most igneous and metamorphic rocks are polycrystalline, i.e. entirely made of crystals, often tightly packed and interlocked. You may discern individual grains mostly when light reflects off surfaces exposed by breaking along preferred directions within some minerals, or because grains from different minerals contrast in colour or luster. Few of the grains will have a regular geometric shape, despite each one being a single crystal. In the case of an igneous rock, some of the well-formed crystal are typically minerals who grew early from the still-liquid magma. Most of the other minerals simply filled the remaining space. If an igneous magma was “gassy” or “watery”, those volatiles may have remained trapped in the last stages of crystallization and formed late pockets in which a few crystals of exceptional quality grew from the remaining dilute magma and had the space needed to fully develop perfect faces. In many rocks, it is later fractures that provided an “open space” in which crystals could grow larger and with well-developed faces from hydrothermal fluids (overheated ion-rich waters), for the future delight of collectors.
Related Questions
Which of the following statements about the fossil record is correct?
A. The fossil record includes more organisms that were abundant, or lived for long periods on Earth, than it is with those that lived for short periods of time and then became extinct.
B. The fossil record is richer with organisms that are the same ones as currently common and living on Earth today.
C. A fossil of a rain forest snake would not be found in an area on Earth that is currently a desert.
D. The fossil record is richer with organisms that resemble organisms that are those alive today.
Answers
Answer:
I believe the answer would be A
Explanation:
You would have more fossils of animals that lived longer time ago than recent one bc they would be more older and more beneath the ground.And for animals to fossilize takes a long time so more older animals would be fossils
Answer:
The answer would be option A.
Explanation:
The process of fossilization is a time taking process which undergoes several stages from drying and freezing to mineralization and petrification. A fossil takes about 2.5 to 3.5 billion years to form. Both biotic and abiotic factors plays an important role in fossil formation therefore, animals that were abundant and buried frequently are more likely to fossilize than animals that lived for a short duration. Moreover, animals that are more abundant and lived for a longer period of time would be likely buried beneath the earth and would have more chances of reaching an ideal condition for fossil formation such as no decomposition which could only be achieved in an oxygen deficit environment as oxygen accelerates the process of decomposition.For more information:
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1. The biological manigestion of the traits
2. A condition where wherein two identical alleles are present
3. A condition wherein different alleles are present
Answer please
Answers
Answer:
1. phenotype
2. heterozygous
3. homo-zygous
Explanation:
In genetics, phenotype refers to the observable characteristics/ traits in a particular organism. An individual phenotype results from the interaction of genes and the environment. Moreover, in diploid (2n) species, an organism is heterozygous for a given trait when it carries two different gene variants or 'alleles' of the same gene. These two alleles are received from both parents, i.e., one allele from one parent and another one from the other parent. Finally, an organism is homo-zygous for a given trait when it carries two identical alleles of the same gene.
Is it a scientific theory or a scientific law that the characteristics of living things change over time?
Answers
Answer:
Scientific Theory
Explanation:
The statement "the characteristics of living things change over time" refers to the concept of biological evolution, which is widely accepted as a scientific theory in the field of biology. In scientific terms, a theory is a well-substantiated explanation of a natural phenomenon that is supported by extensive evidence, experimentation, and scientific consensus. The theory of evolution, proposed by Charles Darwin and further developed over time, provides a comprehensive explanation for the diversity and change in the characteristics of living organisms. It is supported by a vast body of evidence from various scientific disciplines, including genetics, paleontology, comparative anatomy, and molecular biology.
In contrast, scientific laws describe observable patterns or regularities in nature that are often expressed as mathematical equations or principles. Laws, such as Newton's laws of motion or the laws of thermodynamics, describe specific relationships or behaviors in the physical world.
Therefore, the statement about the characteristics of living things changing over time aligns with the theory of evolution, rather than being described by a scientific law.
Hope this helps!
Which question can be answered by science?
A. When is the most enjoyable time to go grocery shopping?
B. How much energy does it take to make a paper bag?
C. Should the government be regulating the use of grocery bags?
O D. Is it O.K. to force people to recycle their grocery bags?
Answers
Answer: A . How much energy does it take to make a paper bag
Explanation: Apex
Identity each event as the result of mechanical weathering or chemical weathering.
mechanical weathering chemical weathering
The minerals in a marble statue react
with water to form acids and pores in
the structure.
A piece of rock crumbles after being
constantly thrashed by strong waves.
Industrial runoff forms cracks in a
rocky structure in its path.
The rocks in a region are streaked
orange after being exposed to
repeated rains.
Answers
The events described involve both mechanical and chemical weathering processes, highlighting the complex nature of how weathering affects geological structures.
The events can be identified as the result of mechanical weathering or chemical weathering as follows:
The minerals in a marble statue react with water to form acids and pores in the structure - This is an example of chemical weathering. The water reacts chemically with the minerals in the marble, causing them to dissolve and form acids. These acids further react with the marble, leading to the formation of pores and overall degradation of the statue's structure.
A piece of rock crumbles after being constantly thrashed by strong waves - This is an example of mechanical weathering. The constant thrashing of strong waves exerts physical force on the rock, causing it to break apart or crumble. This type of weathering occurs due to mechanical forces like abrasion, pressure, or impact that physically break down the rock into smaller pieces.
Industrial runoff forms cracks in a rocky structure in its path - This is a combination of chemical and mechanical weathering. The industrial runoff may contain acidic or corrosive substances that chemically react with the minerals in the rock, leading to their dissolution or weakening. The cracks in the rocky structure may also be a result of the mechanical force exerted by the flowing runoff, causing physical fractures in the rock.
The rocks in a region are streaked orange after being exposed to repeated rains - This is an example of chemical weathering. The repeated rains introduce water into the rocks, which may contain dissolved iron compounds. Over time, these iron compounds oxidize in the presence of water and oxygen, leading to the formation of orange-colored iron oxide minerals, such as rust. The streaking of rocks with orange indicates the chemical transformation of the minerals due to the weathering process.
In summary, the events described involve both mechanical and chemical weathering processes, highlighting the complex nature of how weathering affects geological structures. Mechanical weathering involves physical forces breaking down rocks, while chemical weathering involves chemical reactions leading to the alteration or dissolution of minerals.
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An atom with 3 electrons in its outermost (valence) shell may have a total of ----- electrons altogether.
A. 13
B.3
C.8
D.17
Answers
Based on electronic configuration, the possible number of total electrons in atom with three electrons in its valence shell is 13, option A.
What is the possible number of total electrons in atom with three electrons in its valence shell?The arrangement of electrons in an atom is known as electronic configuration.
Based on electronic configuration;
the first shell can contain two electronsthe second shell can contain 8 electronsthe next shell can contain 18Thus, if we removes the first ten electrons, from each option, The one that has 3 valence electrons is option A, 13.
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Plants in the phylum Bryophyta grow in areas that are _____.
shady and dry
sunny and dry
sunny and damp
shady and damp
Answers
What trend, if any, is evident in Mel’s data?
Answers
The trend that is evident is: Initially, there seems to be support for Mel's hypothesis, but the gold data is not consistent with the predicted trend.
Option C is correct.
How do we calculate?The data for zinc, nickel, copper, and silver shows that as the density increases, the melting point tends to increase.
From the data we can see , the data for gold does not follow this trend, as its density is lower than silver but its melting point is higher.
Therefore, while there is some initial support for Mel's hypothesis, the inconsistency with gold indicates that the relationship between density and melting point is not solely determined by density.
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In the morning, Jorge watched a cartoon about a sarcastic rabbit. Later, in his psychology class, he viewed
the image above and readily identified it as a rabbit instead of a duck. Which of the following best explains
this phenomenon?
Answers
Answer:
The correct answer is - priming.
Explanation:
Priming is a phenomenon that explains the behavior of an individual when an individual experiences a certain stimulus that influences response to a subsequent stimulus, unknowingly of the connection. This effect is known as the priming effect.
In this case, watching a cartoon of a rabbit acts as the stimulus that influences the response of identifying the image of duck as a rabbit. He is experienced priming effect.
What type of volcano forms mostly near hotspots?
1. Shield
2. Composite
3. Cinder Cone
Answers
Answer:
shield volcanoes
Explanation:
As hotspot material rises, the pressure drops so the hotspot begins to melt producing magma .
Answer:
Ash released from shield volcanoes often builds up around the vent forming a steep, round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low.
Explanation:
Which statement describes how the image represents the concept of a common?
Nutrient pollution can cause algae to grow.
Wildlife is negatively affected by algal blooms.
Runoff from many farms can cause water pollution.
Regulations can prevent the pollution shown in the picture.
Answers
Answer:c
Explanation:
Water pollution is the introduction of pollutants either naturally or due to human activities. Runoff from many farms can result in water pollution.
What are the causes of water pollution?Water pollution is the contamination of water sources with some pollutants which make the water unusable for the purposes like drinking, cooking, cleaning, swimming, and other activities.
These substances can be chemicals, bacteria, parasites, etc. All sorts of pollution make go to the water directly or indirectly.
One of the prevalent sources of water pollution is runoff from many farms.
Thus, the correct option is C.
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Question 11 (1 point)
The definition of allele is
a dominant trait
a different form of a gene
a physical characteristic
a genetic disease
Answers
How do you feel about the way people worldwide view the problem of Climate Change?
Answers
Answer:
There is a wide range of views on climate change across the world. While many people understand and acknowledge the scientific evidence that climate change is happening and that human activities are contributing to it, others are more skeptical and deny the reality of climate change altogether. Some people may also acknowledge climate change but are unsure of how to address it, while others may recognize the issue but feel that it is not a priority compared to other pressing problems.
Overall, the level of concern and action taken on climate change varies greatly between different countries and communities. Some countries have made significant strides in reducing their carbon emissions and adopting more sustainable practices, while others have been slower to act or have even actively resisted climate action.
It is clear, however, that climate change is a global problem that affects us all, and concerted global action is needed to mitigate its effects and ensure a sustainable future for all.
1. Which of the following is true of T-lymphocytes?
Answers
the mammal adaptation that provides food for the offspring while promoting the development of the mother-offspring bond is the
Answers
The mammal adaptation that provides food for the offspring while promoting the development of the mother-offspring bond is the mammary gland.
The mammary gland is one of the main characteristics of all mammals. When it comes to female mammals its main characteristic is to produce milk, while in males, the mammary gland is nonfunctional. The mammary gland of a woman consists of a glandular tissue, divided in different
quantities of fat, which gives an authentic shape to the gland. This tissue is made of 15- 20 lobes composed of ductal cells.
Each lobe has many smaller lobules separated by Cooper's ligaments. These lobules connect the skin with the fascia of connective tissue that covers the muscles beneath the breast. The lobes have a separate excretory duct under the nipple, where they widen into milk supplies and
then narrows again towards an opening at
the summit of the nipple. Each mammary gland is boarded with a circular disk from the outside, which is called the areola. Areolas cause the nipples to be firm upon each stimulation and provide lubrication for the nipple during nursing.
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all of the following are examples of natural selection except multiple choice the distribution of dark and light colored peppered moths in britain. a rise in bacterial resistance to antibiotics. the reduction in beak length of scarlet honeycreepers when they changed food sources. the 150 breeds of dogs developed from ancestral wolves. two of these are not examples of natural selection.
Answers
Developing 150 breeds of dogs from ancestral wolves is not an example of natural selection.
The process through which populations of living things adapt and change is known as natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. This variety indicates that some people have characteristics that are more environment-appropriate than others. People that possess advantageous qualities, or adapted traits, are more likely to live and procreate. The adaptable qualities are subsequently passed on to the next generation by these people. These beneficial characteristics spread across the population over time. Favorable features are passed down across generations as a result of natural selection. Natural selection may result in speciation, the process by which one species gives rise to another that is utterly separate.
Hence, survival of the fittest species take among population.
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How are mates limiting factor? Isn’t having mates in fact going to increase population
Answers
Answer: How can limiting factor affect population growth?
Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Competition for resources like food and space cause the growth rate to stop increasing, so the population levels off
Explanation:
There are three alleles for the ABO blood group in humans. Why are there only two alleles normally present in any individual?
1. The alleles for the ABO blood group always segregate independently during meiosis.
2. Each parent contributes only one allele for the ABO blood group to the offspring
3. Every gene for the ABO blood group must be recessive.
4. The alleles that determine the ABO blood group are on the X-chromosome.
Answers
Answer:
2. Each parent contributes only one allele for the ABO blood group to the offspring
Explanation:
Humans are diploid organisms, which means that our cells have two copies of the same gene. These copies are called alleles. We inherit one allele from each parent.
Just like most of our traits, we inherit our blood group from our parents. There are three alleles that determine our blood group: A, B, and O. We can get only two of them, though. Whether our blood group is A, B, AB, or O will depend on the combination of the alleles we inherited.
Water fleas (Cladocera) are small freshwater crustaceans. They are filter feeders can are about 3-5mm long. The outer carapace of a water flea is transparent so the internal organs can be observed. Caffeine raises the heart rate of humans. Hanna predicts caffeine will have the same effect on other organisms. She uses the water flea as her test subject in an experiment. Hanna introduces varying amounts of caffeine to water flea populations. Using a microscope, she measures the heart rate in beats per second of sample water fleas. She records the data in a table. As the concentration of caffeine increases, Hanna observes the water flea heart rate also increases. What is the hypothesis in Hanna’s experiment? A) Caffeine raises the heart rate of humans. B) Water fleas prefer caffeine over plain water. C) Caffeine increase the heart rate of the water flea. Eliminate D) The effects of caffeine are the same on all organisms.
Answers
Answer:
The Answer is C.
Explanation:
sorry i took awhile
The hypothesis is the part of the scientific method that is the supposition based on some observed data. In Hanna's experiment, "caffeine increase the heart rate of the water flea" is the hypothesis. Thus, option C is correct.
What is a hypothesis?The hypothesis has been defined as the conjecture that is proposed in a scientific method and is based on the speculations from the observed facts and information. It is proposed to perform the experiment and reach the conclusion of the reliability.
They are testable and are performed through the experimental design that includes the experimental and control group so that the collected evidence can be analyzed and proved to be true. In Hanna's experiment, the effect of caffeine on the heart rate of fleas is a hypothesis.
It is a hypothesis as it is based on the observed fact that caffeine increases the human heart rate. The caffeine acted as the independent variable and the heartbeat was the dependent variable that showed that water fleas have increased heartbeat if given caffeine.
Therefore, option C. caffeine increases heartbeat is the hypothesis.
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Until the middle of the 20th century, doctors sometimes suggested that
people smoke in order to reduce stress. Since then, doctors have been asking
patients who smoke to quit.
What caused this change?
A. Studies have shown that tobacco and tar in cigarettes have
negative health effects.
B. Tobacco is an illegal drug, and doctors are required to discourage
its use.
C. Tobacco is a nonrenewable resource, and the government has
restricted its use.
D. Tobacco plants have been categorized as an endangered species,
Answers
Answer:
the answers for your question is A.
Patients to stop smoking, research has established the harmful effects of tobacco and the tar in cigarettes on human health, hence option A is correct.
What is the effect of smoking on health?One of the biggest health issues in the world today is tobacco use. Because of smoking, millions of individuals have bad health, and experts predict that smoking causes 8 million premature deaths annually. It has long been a significant health issue.
Up until the middle of the 20th century, physicians occasionally advised patients to smoke in order to relieve stress.
A significant social factor of tobacco usage has been the improvement in human attitudes toward smoking as a result of improved awareness of the negative effects of smoking.
Therefore, studies have shown that tobacco and tar in cigarettes have
negative health effects.
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Experiment: Maria wants to see which fertilizer makes her fig plants
grow best. She will grow 3 fig plants. One plant she will add no
fertilizer, one plant she will add 1 mg of nitrogen powder, and one
plant she will add 1 mg of phosphorus powder. She will measure the
height of each plant every week for 3 months.
Question 1
What is the independent variable?
A. the height of the plant
B. the amount of fertilizer
C. the type of fertilizer
D. the type of plant
Question 3
What is a possible constant?
A. the height of the plant
B. the diameter of the plant
C. the type of fertilizer
D. the amount of fertilizer
Question 2
What is the dependent variable?
A. the height of the plant
B. the amount of fertilizer
C. the type of fertilizer
D. the type of plant
Question 4
Why did Maria not fertilize one of the
plants?
A. to make the experiment easier
B. to compare the results of the other
fertilizers (control group)
C. it was a mistake
D. to purposely kill that plant
nter the correct 4 digits to escape this level. *
LEVEL 3
Convert your letter into a number
A +4=7
7- B=2
C +2=9
5- D=4
Answers
Answer:
Answer 1: B. the amount of fertilizer
Answer 2: A. the height of the plant
Answer 3: D. the amount of fertilizer
Answer 4: B. to compare the results of the other fertilizers (control group)
Explanation:
Oxygen is taken from the water by
Answers
Explanation:
Humans use their lungs to inhale oxygen from the air. But worms, fish, crabs and other underwater animals use gills to get oxygen from the water. As water moves across an animal's gills, oxygen is removed and passed into the blood. Gills work better when there is more oxygen in the surrounding water.
onsider the generalized cladogram of fish.
A cladogram is shown. At point B, the organism shares jaws but not bones.
A fossilized fish is found that has jaws but no true bones. Where does this fossil belong on the cladogram?
A
B
C
D
Answers
The fossilized fish which is found has jaws but no true bones belonging at point B on the Cladogram. Thus, the correct option is B.
What is Cladogram?A cladogram may be defined as a phylogenetic tree that is based on the classification of evolutionary relationships.
In the given cladogram, D is any ancestral point from which speciation occurs. Point C is a basal taxon while A and B are sister taxons.
The organisms of point B have only jaws bu,t not true bones, while the organisms at point A have both jaws and true bones.
Therefore, it is well described above.
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Answer:
ancestor
Explanation:
right on edge
in which biome are minerals in the soil most rapidly depleted
Answers
Answer:
Boreal forest is among the largest terrestrial biomes on earth in which minerals in the soil most rapidly depleted.
A common yard decoration during Halloween is the infamous scarecrow. Aside from
Halloween, scarecrows were used by farmers and intended to scare away birds from
seeds and growing crops. But do they really work? Explain how you could test if
scarecrows are truly an effective bird deterrent.
Answers
Yes, scarecrows work effectively as bird deterrents.
Scarecrows are human like figures that are stationed on fields or farmlands to scare away birds.
To know how effective scarecrow can be, the following things need to be done.
The scarecrow has to flashy that it will attract attention from distance The position of the scarecrow has to changed often so that the birds will not get familiar with the position It should be adorned with accessories that make noise when there is breeze.The scarecrow works as effective bird deterrents when it is not left the same for a long period of time.
#scarecrow# #birds# #deterrents#
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What geological process could have formed the channel on Mars?Provide 3 pieces of evidence that will support your claim.
Answers
Answer: Flowing Water
Explanation: Flowing of water on the land makes channels on the planet Mars.
The flowing of water is the geologic process that could have formed the channel on Mars. According to the image we can say that flowing of water on the land made the channels on the Mars just like on the earth. When the water flows for a long time from the same area, it takes the sediments and make channels so we can say that the flowing of water makes the channels on the Mars.
Flowing water have formed the channel on Mars because the evidence card flowing water formed by water showed the channel formed by water on Earth have a curved and branching similar shape of the channel on Mars.
significant contributions of this knowledge on how mutations may cause changes in structure and function of protein to us humans?
Answers
Answer: Sometimes, gene variants (also known as mutations) prevent one or more proteins from working properly. By changing a gene's instructions for making a protein, a variant can cause a protein to malfunction or to not be produced at all.
Explanation:
11. Which of the following is a function of a protein
Answers
Answer:
Produces vital body structures, providing energy, providing cell structure, maintaining fluid balance, act as buffers, contributes to immune function.
Explanation:
Functions of proteins include:
A. transport of materialsC. structure of your bodyD. enzymes to speed up chemical reactionsF. movement of musclesH. chemical hormonesI. recognition and communication between cellsOptions A, C, D, F, H and I are correct.
Proteins are macromolecules composed of amino acids and play essential roles in various biological processes. They have diverse functions in the body, contributing to its structure, metabolism, and overall functioning.
Proteins involved in transport facilitate the movement of substances across cell membranes or throughout the body, allowing for the uptake and distribution of nutrients, ions, and other molecules. Examples include transport proteins in the blood, such as hemoglobin that carries oxygen.
Proteins contribute to the structure of the body, providing support, strength, and flexibility to tissues and organs. They form the structural framework of cells, muscles, bones, and connective tissues.
Enzymes are proteins that act as catalysts, speeding up chemical reactions in the body by lowering the activation energy required. They play a crucial role in metabolic pathways and are involved in processes such as digestion, energy production, and DNA replication.
Proteins are integral to muscle contraction and movement. They are responsible for generating force and enabling movement of skeletal muscles.
Certain proteins function as chemical hormones, regulating physiological processes and signaling between cells and tissues. Examples include insulin, growth hormones, and thyroid hormones.
Proteins are involved in cell recognition and communication, facilitating interactions between cells and coordinating cellular activities. They play a role in immune responses, cell signaling, and cell adhesion.
However, genetic code, insulation, and providing a quick burst of energy are not primarily attributed to proteins. The genetic code is carried by DNA and RNA molecules, while insulation is primarily provided by adipose tissue. Quick bursts of energy are predominantly fueled by carbohydrates.
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The complete question is:
Which of the following are functions of proteins?
A. transport of materialsB. genetic codeC. structure of your bodyD. enzymes to speed up chemical reactionsE. provide insulationF. movement of musclesG. provide a quick burst of energyH. chemical hormonesI. recognition and communication between cellsWhich specialized cell type would be found lining the trachea, the part of the body that brings air to the lungs?
Answers
Answer: Epithelial Cells
Explanation: It is epithelial cells because epithelial cells are cells that are found in the body surfaces. The conducting passage ways of trachea, nasal cavity, bronchi, bronchioles are lined with a special type of epithelial cells called pseudo stratified columinar epithelial cells which is ciliated and have mucus secreting globlets. These cells are found in the trachea because they have thin surface that facilitate diffusion, moisten the passage ways and protect the trachea from pathogens.
An amino acid's unique characteristics is defined by the ________.