Understanding Gravity

What is gravity?

• A push or pull that makes objects move or change direction.

• A force that makes things float away into space.

• The invisible superglue that holds our massive world together.

• The force that makes things go up.

What would happen to everything on Earth without gravity?

• Everything would stay exactly where it is.

• Everything would float off into space.

• Everything would be pulled towards the sun.

• Everything would become heavier.

Who was the first person to seriously study gravity?

• Albert Einstein

• Galileo Galilei

• Sir Isaac Newton

• Stephen Hawking

How does an object's weight affect how gravity pulls it down?

• Heavier objects are pulled down faster than lighter objects.

• Lighter objects are pulled down faster than heavier objects.

• Gravity pulls all objects down at the same rate, regardless of their weight.

• Gravity only pulls down objects that are very heavy.

When we talk about gravity pulling things "down" on Earth, what does "down" really mean?

• Away from the Earth's surface.

• Towards the center of the Earth.

• Towards the North Pole.

• Towards the direction of space.

What is the speed called that allows astronauts to overcome Earth's gravity and travel to space?

• Escape velocity

• Orbital speed

• Lunar velocity

• Warp speed

If an object has a very large mass, what can be said about its gravitational pull?

• It will have a weaker gravitational pull.

• It will have a stronger gravitational pull.

• Its gravitational pull will be the same as any other object.

• It will not have any gravitational pull.

What two main factors determine the strength of gravitational pull between objects?

• Their color and temperature

• Their size (mass) and the distance between them

• Their shape and material

• Their speed and direction of movement

What is the term for the friction caused by air pushing against a moving object?

• Gravity

• Air resistance

• Weight

• Mass

Why did a hammer and a feather dropped on the Moon hit the ground at the same time, unlike on Earth?

• The Moon has a stronger gravitational pull than Earth.

• The Moon has no atmosphere, so there is no air resistance.

• The objects weighed less on the Moon.

• The experiment was only possible because of the Moon's unique surface.