Energy

The main source of energy is

• Sun

• Moon

• Earth

• Sun and moon

Click all of the things that are non-renewable energy sources.

• wind

• nuclear reactions

• fuel

• movement of water

In the picture, what does the letter "B" represent in the atom?

• energy level

• nucleus

• protons

• neutrons

Which picture is NOT an example of Chemical PE?

• 
• 
• 

The energy of an electron __________ as it moves further away from the nucleus

• increases
• decreases

Force is a _____ or _______

• simple    complex
• push     pull
• up      down
• in      out