Danger! Falling Objects

All things caught in our planet's gravity will, in some way, have the potential to ___

• fall to Earth
• orbit the Moon
• orbit the Sun
• lose their mass

Mass is a measure of ___

• the size of an object
• how electrons move in an object
• how much stuff is under an object
• how much matter is in an object

The heaviness of an object, caused by the pull of gravity, is called ___

• mass
• weight
• density
• bulkiness

Who performed the experiment on the Moon using a feather and a hammer?

• David Scott
• Neil Armstrong
• Buzz Aldrin
• Buzz Lightyear

When a feather and a hammer are dropped on the Moon, what will happen?

• the feather will hit the ground first
• the hammer will hit the ground first
• both will hit the ground at the same time
• the feather will float away

The friction between the air and a moving object is called ___

• air resistance
• the atmosphere
• gravity
• upward draft

On Earth, the feathers flat fluffy shape makes it  ___

• run into more air resistance than the hammer does
• run into less air resistance than the hammer does
• more dense than the hammer
• heavier than the hammer

On the Moon, a hammer and a feather fall at the same rate because ___

• the Moon has almost no atmosphere
• the Moon has a dense atmosphere
• the Earth has a dense atmosphere
• the Earth has almost no atmosphere

Data that supports or disputes a scientific idea is called ___

• conjecture
• a theory
• evidence
• a hypothesis

Flat paper seems to fall more slowly than crumpled paper due to ___

• gravity
• the difference in weight
• the difference in mass
• air resistance