Energy and Heat

How does heat flow?

• Cold to hot
• Hot to cold
• Heat doesn't flow!
• Wait what?

What happens to the particles of a substance when heat is added?

• The particles move slower
• Nothing
• The particles move faster

Burning your hand on a hot pan

• Conduction
• Convection
• Radiation

Warming hand over a radiator.

• Conduction
• Convection
• Radiation

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed

Food has _______ potential energy that our bodies transform into kinetic energy.

• Elastic
• Nuclear 
• Gravitational
• Chemical

Imagine dropping a basketball. When would it have the most gravitational potential energy?

• When it is closest to the ground
• When it is at the highest point
• When it is halfway down
• It has the same amount of gravitational PE at all points

Which of the following best describes the energy transfer that takes place when you use a battery?

• Chemical PE -> Electrical
• Electrical -> Chemical PE
• Nuclear PE -> Electrical
• Electrical -> Nuclear PE

Thermal energy ALWAYS moves from _____ to _____.

• solid to liquid
• ice to water
• hot to cold
• solid to gas

Which example below is an example of convection?

• Standing on a hot metal bridge
• The attic is warmer than the basement
• The Sun heating the Earth
• Touching hot sand with your feet