RF Thermal Energy

Which of the following is a source of Thermal Energy

• Sun
• fire
• friction
• all of the above

Friction is 

• a magnetic force of attraction.
• the force of gravity pulling objects to Earth.
• mechanical energy of motion or position.
• a force between objects in contact.

All of the following produce heat energy except-

• A
• B
• C
• D

All of the following things are uses of heat energy except −

• attracting paper clips to a magnet.
• hanging towels to dry in the sun after a swim.
• cooking dinner on the barbecue grill.
• rubbing your hands together when they are cold.

When a log burns in a fireplace, you can feel

• A. sound energy
• B. thermal energy
• C. light energy
• D. a force

When an object has heat energy, the energy

• A. stays the same
• B. moves to where there is less heat
• C. evaporates   
• D. melts

Rubbing your hands together creates friction. Friction produces

• A. magnetism     
• B. electricity
• C. Light energy
• D. Thermal Energy

Which of the following objects produce Thermal Energy?

• A
• B
• C
• D

Why does a jacket keep you warm in the winter?

• A. It produces heat.
• B. It attracts heat.
• C. It traps body heat.
• D. It is dark in color.

What is the best way to stay cool in the summer?

• A. Stand in the sun.
• B. Stand in the shade.
• C. Wear heavy sweaters.
• D. Do not wear heavy sweaters