Chapter 4 8th Grade Science Energy Putman

When you ride a playground swing, your potential energy is greatest at the highest point.

• true
• false

The kinetic energy of an object increases as its ____ increases.

• gravitational energy
• potential energy 
• specific heat
• velocity

Increasing the speed of an object ____ its potential energy.

• does not affect
• increases
• decreases
• changes

The SI unit for energy is the ____.

•  kilogram
• joule
• meter per second
• calorie

You can calculate kinetic energy by using the equation ____. 

• KE (J) = 9.8m/s² x 1/2m(kg)
• KE (J) = m(kg) x 9.8 m/s² ´ h (m)
• KE (J) = 1/2 m (kg) x v²(m²/s²)
• KE (J) = w (m) x h (m)

You can calculate gravitational potential energy by using the equation ____.

• GPE (J) = 1/2h (m) x w(m)
• GPE (J) = m (kg) x 9.8 m/s² x h(m)
• GPE (J) = 1/2m (kg) x 1/2h(m)
• GPE (J) = h (m) x 9.8 m/s²

Which of the following devices does not make use of electrical energy?

• upright piano
• toaster
• radio
• digital camera

A bus engine transfers chemical potential energy into ____ so that the bus moves. 

• gravitational potential energy
• electrical energy
• thermal energy
• kinetic energy

In a nuclear fusion reaction, mass is transformed into ____.

• light
• nuclei
• energy
• matter

According to the law of conservation of energy, the total amount of energy in the universe ____. 

• remains constant
• increases 
• changes constantly
• decreases