Energy cannot be created or destroyed in any reaction. This law is known as......

• Energy Transfer 
• Energy Transformation 
• Conservation of Energy 
• Gravitational Limits 

What two factors determine the amount of potential energy an object has

• speed and mass
• speed and position
• mass and position
• temperature and mass

Potential energy that depends on height or position from surface of the Earth is

• Gravitational potential energy 
• Chemical potential energy 
• Elastic potential energy 
• Magnetic potential energy 

A baby carriage sitting at the top of the hill

• Kinetic 
• Potential 

A running refrigerator motor 

• Kinetic 
• Potential 

A spring in a pinball machine before it is released

• Kinetic 
• Potential 

A race-car traveling at its maximum speed

• Kinetic 
• Potential 

What two factors affect the strength or force of gravity between two objects

• mass and speed
• speed and distance 
• mass and distance
• heat and composition

Why is the force of gravity important to the Earth and Moon?

• Gravity keeps the Earth in orbit around the Sun and Moon in orbit around the Earth
• Gravity keeps the Sun from gaining to much mass
• Gravity keeps the Sun in orbit around the Earth and the Earth in orbit around the Moon
• Gravity keeps the moon from gaining to much mass

The reason the Moon orbits the Earth, and the Earth orbits the sun (and not the other way around) is: 

• the Moon has a larger mass than the Earth
• the Sun has a smaller mass than the Earth
• smaller massed objects in space orbit those with larger masses 
• the Earth has a longer orbit than the Moon