Chemistry Middle School

Scientists believe that the modern horse developed from a short, horse-like mammal about the size of a dog. Over millions of years, the horse increased in size and developed much longer legs. Horses with longer legs had a better chance of surviving than the shorter-legged members of the herd. How did longer legs help horses survive?

A. They allowed the horses to reach nuts in trees.

B. They allowed the horses to outrun predators.

C. They allowed the horses to carry more body weight.

D. They allowed the horses to capture prey.

Answers

Answer 1

Answer:

B

Explanation:

Horses with longer legs could out run predators and survive. Not getting eaten or injured helps with staying alive long enough to reproduce.

Related Questions

questions in picture

questions in picture

Answers

The gas laws have been applied to find the missing values;

1) 1.72 atm

2) 880 K

3) 1.13 atm

4) 5.9 L

5)  167.4 kPa

What is the Charles law?

The Charles, Boyle's and Gay - Lussac's laws are applied here.

We know that;

From Gay Lussa law

\(P_{1}\)/\(T_{1}\) = \(P_{2}\)/\(T_{2}\)

\(P_{2}\) = 1.21 * 450/315

\(P_{2}\) = 1.72 atm

From Charles's law

\(V_{1}\)/\(T_{1}\) = \(V_{2}\)/\(T_{2}\)

\(T_{2}\)    = 4.8 * 495/2.7

\(T_{2}\)= 880 k

From Boyle's law

\(P_{1}\)\(V_{1}\)= \(P_{2}\)\(V_{2}\)

\(P_{2}\) = 7.14 * 1.9/12.0

\(P_{2}\) = 1.13 atm

From the general gas law;

\(V_{2}\) = 2.1 * 6.9 * 291/1.8 * 400

\(V_{2}\) = 4216.59/720

\(V_{2}\) = 5.9 L

From Gay Lussa law

\(P_{1}\)/\(T_{1}\) = \(P_{2}\)/\(T_{2}\)

\(P_{2}\)  = 315.2 * 145/273

= 167.4 kPa

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What was the low temperature for hurricane Katrina?

Answers

Answer: 90 degrees F

Explanation:

The temperature was 90 F (32 C)

PLS HELP DONT GOGGLE!!

PLS HELP DONT GOGGLE!!

Answers

The area where the land meets the sea is called the coastline. This area can have different physical features depending on its location. Some common features of coastlines are beaches, cliffs, bays, harbors, estuaries, and dunes. Beaches are made up of loose particles like sand and gravel that are deposited by the sea.

At the point where land meets the sea, there is often a distinct line of demarcation between the two. This line, known as the shoreline, can take many different forms, depending on the specific geographic location.

In some areas, the shoreline may consist of a wide, sandy beach, while in others it may be rocky and steep.

In general, the shoreline is where the land transitions to the sea, and it is often marked by the presence of waves, tides, and other oceanic phenomena.

Which of these is an example of how a scientist might use a model?

A) using a stopwatch to clock a runner's mile time
B) measuring the mass of an object with a scale
C) magnifying a group of cells with a microscope
D) building a brain made of plastic with many of its parts labeled

Answers

Answer: Marbles placed inside a hollow sphere are used to describe protons in a nucleus.

D, because it’s a model, not a real life subject. Have a great day!

Why are some incomplete fossils able to be pieced together? Full fossils of large animals can be found together. Hard tissue, like bone, never breaks or chips. Fossils require salt water to be preserved fully. Impressions from the skin can be preserved.

Answers

Answer:

Explanation:

The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.

Answer:

The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains are dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.

The __________ you run on will move your body in different ways because it offers different kinds of force.

A.
location

B.
shoes

C.
surface

D.
sea-level

*<3 pls answer quick :)*

Answers

Answer:

C

Explanation:

In this question it states that it moves your body in different ways, like when on a run in a forest, there are inclines, declines, twists, and turns, making your body move and function in different ways

Hope this helps!!! If so please give brainliest <3

Answer: C

Hope you Have a good day!

Which of the following would occur if the Thrush population was to suddenly decrease?



a
The population of Eagles would increase
b
The population of Eagles would decrease
c
The population of Dragonfly would decrease
d
The population of corn would increase

Which of the following would occur if the Thrush population was to suddenly decrease? aThe population

Answers

Answer- B

Reasoning: Since Eagles directly eat Thrush, their populations would decrease.

The other answers are wrong because with the first choice, Eagles would not increase in population if one of their food sources were removed. For the third choice, Dragonflies wouldn’t increase. Since Thrush eat Dragonflies, the disappearance of Thrush wouldn’t hurt the population of Dragonflies. Lastly, The last option is wrong because corn isn’t reliant on animals to survive. If Thrush disappear, corn will not be affected. This leaves B. to be the answer.

What are the different layers of the Earth, and how do they interact?

Answers

Crust, mantle, outer core, inner core.
Crust, metal, outer core, inner core

which is not an independent variable

which is not an independent variable

Answers

Option B (Signal strength at the computer). This variable sounds like something that would be measured - and is affected by the independent variables, this variable is known as the dependent variable.

Concentration is the amount of a substance in a given volume.

True or False

Answers

Answer:

True?

Explanation:

Answer:

i think its true but im not to sure

Explanation:

The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

hellppppppppp due today

hellppppppppp due today

Answers

Answer:

umm sorry but some times do it your self

Explanation:

Answer:

its too much and the people that say download here and put bit . ly blah blah are fake.

Explanation:

On this number line, zero represents sea level. Plot the following points based on the description provided by dragging and dropping the dots to the appropriate locations on the number line.







greatest common factor of 8 and 12

where does this go on the number line

Answers

The greatest common factor would be 4
On the number line
The correct Answer is 4

I need some help plsssss, no explanation needed and also, I'm being timed! Thanks for your time

I need some help plsssss, no explanation needed and also, I'm being timed! Thanks for your time

Answers

Answer:

potassium, sodium, lithium, magnesium, copper, silver, gold

Explanation:

thanks me later ')

If the temperature of the Earth's layers increases by about 90 degrees Fahrenheit for every 1 mile from the surface and you are estimating the temperature of a point in the mantle 160 miles below the surface, how hot would the mantle be at that depth?
A. 12,800°F
B. 14,400°F
C. 1.78°F
D. 160°F

Answers

Answer:

Temperature Range:

On average, the surface of the Earth's crust experiences temperatures of about 14°C. However, the hottest temperature ever recorded was 70.7°C (159°F), which was taken in the Lut Desert of Iran as part of a global temperature survey conducted by scientists at NASA's Earth Observatory.

Explanation:

BRAINLIEST PLZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!

D is the answer hopefully this helped

Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.

Calculate the volume (in cm3 ) of 54 g of water at 1 C .Express the volume in cubic centimeters to two

Answers

157,464 I think this is the answer
since the density of water is 1, then 1g = 1cm^3. So the volume of 54g of water is 54cm^3 with 2 significant figures

HURRY!!

What happens when light from the Sun passes through any type of matter?
O The light slows down.
O The light speeds up.
O Most of the light is absorbed.
O Most of the light is reflected.

Answers

When light firm the sun passes through matter it’s slows down

When light from the Sun passes through any type of matter, The light slows down.

What are Electromagnetic radiations?

Electromagnetic radiation is a type of energy that is all around us and takes many forms, such as radio waves, microwaves, X-rays and gamma-rays. Sunlight is also a form of electromagnetic energy, but visible light is only a small portion of the electromagnetic spectrum, which contains a broad range of wavelengths.

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves. In order from highest to lowest wavelength, the series is just opposite.

Light is also a Electromagnetic radiation.

Therefore, When light from the Sun passes through any type of matter, The light slows down.

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What type of person studies and collects data on the weather?

Answers

The answer would be a Meteorologist
Meteorologist is a person who studies and collects data

Bodies at _____ tend to remain at rest.
A.) motion
B.) zero degrees
C.) rest
D. ) ease

Answers

Answer:

C.

Explanation:

Newton's 3rd law of motion: Inertia. It states that bodies at rest tend to stay at rest.

D.) ease is the answer

How did this piece of evidence change your thinking about the channel on Mars? Explain your ideas below.

How did this piece of evidence change your thinking about the channel on Mars? Explain your ideas below.

Answers

The piece of evidence changed thinking about the channel on Mars because it shows that the rock was formed next to flowing water as such rock formations exist on Earth and were formed by flowing water.

Was there flowing water on Mars ?

The geologic process that could have created the channel on Mars is water moving. We can infer from the image that water running across the terrain on Mars created channels similar to those on Earth.

We can claim that the flowing of water creates the channels on Mars because when the water runs for a long period from the same region, it takes the sediments and creates channels.

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Erosion, that mats isn’t just a dry planet & can have a diverse eco system

could some please help me with this? thank you

could some please help me with this? thank you

Answers

Answer:

C

Explanation:

Oxidation occurs at the anode. That means the element's oxidation number should increase. Mg has an oxidation number of 0, but Mg2+ has an oxidation number of 2, showing it was oxidized.

Which SI unit is most appropriate for measuring density?

A.
Kiloliters (kL)

B.
Grams per cubic centimeter (g/cm3 )

C.
Cubic meters (m3 )

D.
Liters per cubic centimeter (L/cm3 )

Answers

Answer:

kilogram per cubic meter

Explanation: SI unit for density is the kilogram per cubic meter (kg/m3). So the answer is C.

Answer: kilo gram per cubic meter (kg/m3)

EXPLANATION:
SI unit of density is kg/m3, for convenience we use g/cm3 for solids, g/ml
for liquids, and g/L for gases.

Hope y’all can see this, I need help

Hope yall can see this, I need help

Answers

Answer:

b

Explanation:

i hope this helps, wish u luck

Answer: D or only 2 correctly describe the importance of soil

Explanation: Don't know what to put here.

PLEASE HELP !!!
I'll give brainlest

PLEASE HELP !!!I'll give brainlest

Answers

Answer:

6m/s

Explanation:

I've done this problem

(Planet X is earth without tilt.)
if the The amount of daylight received by the Northern Hemisphere on Planet X would
change or not change throughout the year.

Answers

Sorry don’t know but I hope you figure it out

Identify all the correct examples of weather

Answers

Answer:

Here are some correct examples of weather:

Sunny and warm weatherRainy and humid weatherFoggy and cool weatherSnowy and cold weatherWindy and stormy weatherHazy and hot weatherThunderstorms and lightningHurricanes and tornadoesClear and crisp weatherOvercast and dreary weather.

Explanation:

espero te ayude

Is there a list of weather examples that I would choose from?

What is the charge on the Cr in Cr2O72-

Answers

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

In the dichromate ion, the oxidation number of chromium is+6. The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion.

The forces from below the surface that change the surface of the earth are

Erosion
Earthquakes
Volcanoes
Living things
Weathering
Faulting
Folding
Glaciers

Answers

Correct! The forces from below the surface that change the surface of the Earth include:

1. Erosion: The process of wearing away the Earth's surface by wind, water, ice, or other geological agents.2. Earthquakes: Sudden movements of the Earth's crust caused by the release of energy in the Earth's interior, resulting in shaking and sometimes surface displacement.3. Volcanoes: Openings in the Earth's crust through which molten rock, gases, and ash erupt onto the surface. Volcanic activity can lead to the formation of new landforms and alteration of existing ones.4. Weathering: The breakdown and alteration of rocks and minerals at or near the Earth's surface due to various physical, chemical, and biological processes.5. Faulting: The movement and displacement of rock layers along a fault line, typically caused by tectonic forces. This can result in the formation of new landforms or changes in the existing ones.6. Folding: The bending or warping of rock layers due to tectonic forces, resulting in the formation of folds and mountain ranges.7. Glaciers: Large masses of ice that slowly move over the Earth's surface, eroding the land and shaping the landscape through processes like plucking and abrasion.8. Living things: While not a direct force from below the surface, living organisms can play a role in shaping the Earth's surface through activities such as burrowing, root growth, and vegetation cover.

These forces, both natural and influenced by living organisms, contribute to the continuous changes in the Earth's surface over time.

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Answer: Incorrect

Explanation: Glaciers don't form from forces from below

List at least three properties of matter.

Answers

Answer: Mass, Volume, shape

Explanation: that’s the three basic properties of matter

Answer; Mass, Volume, Shape

Which medical condition(s) can prevent molecules from entering the cell?

Answers

Answer:

cell membrane disease

Explanation:

Cell member disses....

What is coevolution? *
A. When two species evolve in response to each other
B. When 2 sub group of the same species evolve at the same time
C. When the environment and the animals within the environment evolve at the same time

Answers

Answer:C

Explanation:

I would say it’s option A.

Hope this helped and have a nice day :)
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