UNIT 7. ENERGY

What type of energy does an object gain when it is lifted?

• Potencial

• Electric

What type of energy does an object have when it is in motion?

• Chemical

• Kinetic

What type of energy is produced when electrons are pushed from one atom to another?

• Mechanical

• Electric

What type of chemical reaction produces heat?

• Exothermic reaction

• Endothermic reaction

What type of energy travels in waves?

• Thermal energy

• Light energy

One example of exothermic reaction is...

• the combustion

• the photosynthesis

A metal called uranium is needed to produce nuclear energy

• True

• False

Petroleum and coal are both liquid fossil fuels

• True

• False

Natural gas produces more carbon dioxide than coal or petroleum when it is burned

• True

• False

The Sun and the wind can be unreliable sources of energy

• True

• False