Gravity
If you were to go to the moon, how would you feel?

Gravity

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What is gravity? Gravity is one of four physical forces in nature that shape the universe. These forces include strong nuclear forces, weak nuclear forces and electromagnetic forces. The force of gravity has an infinite range. It is the pull of two bodies of matter that brings them closer together. As an example, there is a gravitational pull between two magnets or a magnet and a metal surface. You can also look at humans and animals. The earth has a gravitational pull that pulls everything to the ground. Without it, instead of walking, we would all be floating around.

The bigger the object is the stronger the gravitational pull will be. As the Earth is much bigger than any object on it, (including people and animals), each object is attracted to the Earth’s surface by its gravitational pull.

Gravitational pull is the amount of force that is exerted by larger objects over smaller objects. As Sir Isaac Newton described, gravitational pull is the force that is proportional to the mass of two different objects.

Sir Isaac Newton is believed to be the first scientist to really study and do experiments with gravity and motion.

As the moon is smaller than the Earth, it has a smaller gravitational pull because it has less mass and less weight. Because of this, if you were to go to the moon, you would easily bounce up and down as you tried to walk. You would feel rather weightless. Even with its lesser gravitational pull, the moon’s gravity directly affects the Earth’s tides. The closer the moon is to the Earth will result in higher ocean tides. As the moon moves away from the Earth, the gravitational pull weakens and the ocean tides lower. Finally, if there was no gravitational pull between the Earth and the moon you wouldn’t even see the moon because it would simply float away from its orbit.

Weight deals primarily with gravity. This is because the amount that an object weighs is directly based on the amount of gravitational force or the gravity that is pulling the object down. The stronger the pull of gravity is, the more the object will weigh. The weaker the pull of gravity is, the less the object will weigh.

1.
What would happen if the Earth did not have any gravity?
Life would cease to exist
All objects not anchored down on its surface would float
The moon would crash into the Earth
The lifespan of man and animals would drop sharply
If the Earth did not have any gravity, all objects not anchored down to the surface would float. Answer (b) is correct
2.
Why do your feet stay on the ground instead of floating?
Centrifugal force
Gravity
Volume and mass
Weight
Your feet stay on the ground because of the Earth’s gravitational pull or, simply put, because of gravity. Answer (b) is correct
3.
Why are people, animals and almost all objects attracted to the Earth?
It is where they were born or created so they have an attraction to remain in a place that is familiar to them
Because the moon has a smaller gravitational pull, people and animals would float away so they choose Earth instead
Because people and animals need oxygen, the Earth is the only source to get that oxygen to they are attracted to the Earth in order to find oxygen
Because the Earth is bigger than people, animals and objects on the Earth’s surface, they are attracted to the Earth through gravity
The bigger the object the more gravitational pull it will have. As the Earth is much bigger than people, animals and objects on its surface, each of these is attracted to the Earth. Answer (d) is correct
4.
What is gravity?
It is the force that creates tidal waves
It is the relationship between the Earth and the moon
It is one of the four physical forces found in nature
It is the force that holds the Earth together
Gravity is one of four physical forces in nature that shape the universe. Answer (c) is correct
5.
This deals primarily with gravity.
Mass
Weight
Volume
Atmosphere
Weight deals primarily with gravity. Answer (b) is correct
6.
Who was the first scientist to really study and experiment with gravity and motion?
Sir Isaac Newton
Alex Haley
Aristotle
Plato
Sir Isaac Newton is believed to be the first scientist to really study and experiment with gravity and motion. Answer (a) is correct
7.
What can we see in the sky that is directly related to gravity?
Sun
Stars
Moon
Satellites
If there wasn’t a gravitational pull between the Earth and the moon, we would not be able to see the moon. It would float away from its orbit. Answer (c) is correct
8.
If you were to go to the moon, how would you feel?
Weightless
Heavy
Huge
Tiny
Because of the smaller gravitational pull of the moon, you would feel rather weightless. Answer (a) is correct
9.
The closer the moon is to the Earth will result in what kind of ocean tides?
Flat
Lower
More
Higher
The closer the moon is to the Earth will result in higher ocean tides. Answer (d) is correct
10.
This is the amount of force that is exerted by larger objects over smaller objects.
Strong nuclear force
Weak nuclear force
Gravitational pull
Electromagnetic force
Gravitational pull is the amount of force that is exerted by larger objects over smaller objects. Answer (c) is correct
Author:  Christine G. Broome

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