Energy

Energy

Energy

Forms of Energy

Joules

Energy is measured in Joules-the same units as work

Poll

Energy is measured in ______ the same units as work.

• joules

• meters

Mechanical Energy

• Associated with motion, position and shape

• A combination of its Potential Energy and Kinetic Energy

• ME=PE+KE

Poll

Mechanical Energy is A combination of its Potential Energy and _______ Energy.

• elastic

• kinetic

Multiple Choice

If the kinetic energy of a falling apple is 5.3 J and its potential energy is 3.6 J, what is its mechanical energy?

• 5.8 J

• 8.9 J

• 8.7 J

• 15.7 J

Thermal Energy

Thermal energy is the total kinetic (motion) energy of the tiny particles that make up matter. The faster the particles move, the warmer the matter becomes.

Electrical Energy

• The energy of electric charges

• Can be kinetic

• can be potential

Chemical Energy

• Energy stored in chemical bonds

• When the bonds are broken the energy is released

Electromagnetic Energy

• Form of energy that travels through space in waves

• The light we see from the sun

• Cell Phones

• Microwaves

• Radio Waves

Nuclear Energy

• Stored in atoms

• Released during a nuclear reaction

• Fission- Splitting of atoms

• Fusion- Atoms join together

• Nuclear fusion reactions occur continuously in the sun, releasing tremendous amounts of energy

Quick Check

Multiple Choice

7. What form of energy is stored in the bonds between molecules of matter?

• chemical

• heat

• kinetic

• mechanical

Multiple Choice

the ability to do work is

• work

• matter

• energy

• photons

Multiple Choice

10. Lightning during a thunderstorm is an example of what form of energy?

• chemical

• electrical

• thermal

• nuclear

Multiple Choice

This would be

• chemical

• nuclear

• electrical

• electromagnetic

Multiple Choice

What kind of energy?

• thermal

• electrical

• nuclear

• chemical

Multiple Choice

11. A baseball held by a pitcher has _____________energy.

• potential

• kinetic

• thermal

• chemical

Multiple Choice

What kind of energy is in a moving skateboard?

• potential

• kinetic

• chemical

• radical