practice Q4

The strength of gravity is based on two things: what are they? Select them both.

• distance

• matter

• oxygen

• mass

Why does the moon have more gravitational strength that the Earth?

• it's distance is far away

• it has more mass

• it has less mass

• it's distance is close

The Earth's gravitational pull affects the moon, but the moon's gravitational force affects Earth, too. We see this with...

• tides

• moon phases

• distance

• mass

The location of where we are with the moon affects the tides. When we are facing the moon, the tides ____. We we face away from the moon, the tides fall.

• fall

• pull

• rise

• push

Meteors and meteorites have one big difference between them. What is that difference?

• Meteorites strike the Earth's surface and meteors burn up in Earth's atmosphere.

• Meteors strike the Earth's surface and meteorites burn up in Earth's atmosphere.

If the mass of one of two spheres increases, how does it affect the gravity between the two spheres?

• the gravity increases

• the gravity decreases

• the gravity fluctuates

• the gravity is not affected

What is something that has a larger gravitational field than the Earth?

• my pencil

• a fly

• Mars

• the moon

• the Sun

The Moon's gravitational field is __of Earth's.

• 1/3
• 1/4
• 1/6
• 1/5

What unit of measurement is used for mass in physics?

• Liter

• Kilograms

• Meters

• Newtons

What do you use to measure the mass of an object?

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