Physics Quiz-Nadia Elezovic 7A

What is the force that pulls objects towards the center of the Earth?

• gravity
• repulsion
• magnetism
• centrifugal force

What is an example of kinetic energy?

• sleeping cat
• motionless tree
• stationary rock
• a rolling ball

Does light travel faster than sound?

• Light travels faster than sound due to the difference in medium through which they propagate.
• Light travels slower than sound.
• Light and sound travel at the same speed.
• Sound travels faster than light due to the difference in medium through which they propagate.

What type of energy does a stretched rubber band have?

• Thermal energy

• Chemical energy
• Kinetic energy
• Potential energy

What type of energy is stored in food?

• Nuclear energy
• Solar energy
• Chemical energy
• Mechanical energy

Which of the following is a good conductor of heat?

• Metals
• Plastic
• Glass
• Wood

What is the formula for calculating density?

• Density = Volume / Mass
• Density = Mass x Volume
• Density = Mass - Volume
• Density = Mass / Volume

Sound travels faster in water than in air.

• True
• Sometimes
• False
• Depends on the temperature

Heat always flows from cold objects to hot objects.

• False
• Sometimes
• True
• Rarely

Which of the following materials is the best insulator?

• Fiberglass
• Aerogel
• Aluminum
• Copper