Gravity Quiz

Question 1

TRUE OR FALSE: Gravity is an invisible force that pulls objects toward each other. Earth’s gravity is what keeps you on the ground and what makes things fall.

Answer 1

True

Question 2

Anything that has __________________ also has gravity.

Answer 2

Mass

Question 3

TRUE OR FALSE: Objects with more mass have more gravity.

Answer 3

True

Question 4

TRUE OR FALSE: If you were on a planet with less mass than Earth, you would weigh more than you do here.

Answer 4

False

Question 5

Gravity is what holds the planets in ____________________ around the sun and what keeps the moon in orbit around Earth.

Answer 5

Orbit

Question 6

The gravitational pull of the moon pulls the seas towards it, causing the ocean ________________.

Answer 6

Tides

Question 7

TRUE OR FALSE: Gravity can only act on solid materials and has no effect on light waves.

Answer 7

False

Question 8

__________________________ pack so much mass into such a small volume that their gravity is strong enough to keep anything, even light, from escaping.

Answer 8

Black Holes

Question 9

TRUE OR FALSE: The pull of gravity is exactly the same everywhere on Earth.

Answer 9

False

Question 10

A ____________________________ is an invisible (yet incredibly fast) ripple in space.

Answer 10

Gravitational Wave

Question 11

TRUE OR FALSE: Gravitational waves travel at the speed of light (186,000 miles per second).

Answer 11

True

Question 12

More than 100 years ago, a great scientist named ___________________________ came up with many ideas about gravity and space.

Answer 12

Albert Einstein

Question 13

Einstein predicted that something special happens when two bodies—such as planets or stars—orbit each other. He believed that this kind of movement could cause __________________ in space.

Answer 13

Ripples

Question 14

TRUE OR FALSE: The most powerful gravitational waves are created when objects move at very high speeds.

Answer 14

True

Question 15

TRUE OR FALSE: In 2015, scientists detected gravitational waves for the very first time.

Answer 15

True

Question 16

TRUE OR FALSE: Neutron stars are the most strongly gravitating form of matter known.

Answer 16

True

Question 17

Black holes are not matter at all but rather purely curved ____________________.

Answer 17

Space

Question 18

What type of waves are undulations in spacetime produced by the acceleration of massive objects?
A.tidal waves B.gravitational waves C.sound waves
D.light waves

Answer 18

B. Gravitational Waves

Question 19

Highly magnetic, furiously rotating neutron stars that emit sweeping beams of light are known as ____.
A.quasars
B.white dwarfs
C.pulsars
D.hyperons

Answer 19

C.pulsars

Question 20

TRUE OR FALSE: Pulsars can blink on and off at more than 700 times per second.

Answer 20

True

Question 21

Supernovae occur when stars run out of fuel and cease generating ___________________ in their cores.

Answer 21

Energy

Question 22

Every object in the universe exerts a force on every other object. This force is called ______.

Answer 22

Gravitational Force

Question 23

The measure of the gravitational force exerted by Earth on an object is the object’s _____.

Answer 23

Weight

Question 24

The amount of gravitational force between two objects depends on their ______.

Answer 24

Mass and Distance