Energy Transformations

An energy _____ occurs when energy changes from one type to another type.

• increase

• conversion

• transformation

What happens to potential energy when a ball is tossed into the air?

• It never changes.

• It increases as the ball approaches its highest point.

• It decreases as the ball approaches its highest point.

According to the law of conservation of energy, energy cannot

• be created or destroyed.

• transferred from one region to another.

• transformed from one form into another.

When a ball is thrown into the air, its kinetic energy is lowest

• at its highest point.

• at the moment it is released.

• as it begins to fall back to the ground.

What type of energy transformation occurs during photosynthesis?

• Radiant energy becomes chemical energy.

• Thermal energy becomes chemical energy.

• Nuclear energy becomes mechanical energy.

Energy Transformation

• Energy of height

• Energy moving

• Is energy changing from withitn one object or system

• Energy changing

Transforms gravitational potential energy into kinetic energy

• A falling object
• A rolling stone
• A bouncing ball
• A stationary object

Transforms mechanical energy into thermal energy

• Kinetic energy
• Friction
• Gravity
• Magnetism

Reduces friction’s creation of thermal energy

• Increase surface roughness
• Use water as a lubricant
• Apply heat to the surfaces
• Use lubricants or reduce contact area.

The changes from electrical energy to radiant energy to thermal energy are energy _________

• transformations
• transfers
• transmissions
• conversions