Gravity Quiz Flashcards
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.
True
Anything that has __________________ also has gravity.
Mass
TRUE OR FALSE: Objects with more mass have more gravity.
True
TRUE OR FALSE: If you were on a planet with less mass than Earth, you would weigh more than you do here.
False
Gravity is what holds the planets in ____________________ around the sun and what keeps the moon in orbit around Earth.
Orbit
The gravitational pull of the moon pulls the seas towards it, causing the ocean ________________.
Tides
TRUE OR FALSE: Gravity can only act on solid materials and has no effect on light waves.
False
__________________________ pack so much mass into such a small volume that their gravity is strong enough to keep anything, even light, from escaping.
Black Holes
TRUE OR FALSE: The pull of gravity is exactly the same everywhere on Earth.
False
A ____________________________ is an invisible (yet incredibly fast) ripple in space.
Gravitational Wave
TRUE OR FALSE: Gravitational waves travel at the speed of light (186,000 miles per second).
True
More than 100 years ago, a great scientist named ___________________________ came up with many ideas about gravity and space.
Albert Einstein
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.
Ripples
TRUE OR FALSE: The most powerful gravitational waves are created when objects move at very high speeds.
True
TRUE OR FALSE: In 2015, scientists detected gravitational waves for the very first time.
True
TRUE OR FALSE: Neutron stars are the most strongly gravitating form of matter known.
True
Black holes are not matter at all but rather purely curved ____________________.
Space
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
B. Gravitational Waves
Highly magnetic, furiously rotating neutron stars that emit sweeping beams of light are known as ____.
A.quasars
B.white dwarfs
C.pulsars
D.hyperons
C.pulsars
TRUE OR FALSE: Pulsars can blink on and off at more than 700 times per second.
True
Supernovae occur when stars run out of fuel and cease generating ___________________ in their cores.
Energy
Every object in the universe exerts a force on every other object. This force is called ______.
Gravitational Force
The measure of the gravitational force exerted by Earth on an object is the object’s _____.
Weight
The amount of gravitational force between two objects depends on their ______.
Mass and Distance
