District Assessment 1 Review

A student rapidly rubs the palms of both hands together. Which sequence correctly describes the energy transformations that occur?

• chemical to mechanical to heat
• mechanical to nuclear to heat
• heat to mechanical to chemical
• mechanical to heat to chemical

Maria made the following chart.

Which of these shows the correct placement for the examples in the numbered columns of the chart?  

• 1-Car at top of hill
  2-Stretchy hair band
  3-Matches
• 1-Stretchy hair band
  2-matches
  3-Car at the top of the hill
• 1-Stretchy hair band
  2-Car at the top of the hill
  3-Matches
• 1-Matches
  2-Car at the top of the hill
  3-Stretchy hair band

Which statement best describes the energy changes that occur while a child is riding on a sled down a steep, snow-covered hill?

• Kinetic energy decreases and potential energy increases.
• Kinetic energy increases and potential energy decreases.
• Both potential energy and kinetic energy decrease. 
• Both potential energy and kinetic energy increase.

A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go, the spring recoils.

At which time is potential energy in the spring being converted into kinetic energy in this system?

• when the spring is stretching

• when the spring is fully stretched

• when the spring is released

• when the spring is fully released

Which of the following are examples of elastic potential energy?

• slinky, hot dog, pogo stick
• trampoline, bungee cord, rubber band
• high dive, bird’s nest in a tree, springs
• rock on a cliff, fireworks display, clock ticking

After a wind storm, there is one apple left on the tree.  Where would this apple have the most gravitational potential energy?

• falling from the tree
• on the apple tree
• in your stomach
• on the ground

Which of the following best describes the energy conversion when a cell phone is used?

• chemical energy to electrical energy and light energy

• chemical energy to nuclear and light energy

• light energy to chemical and nuclear energy

• light energy to sound and electrical energy

Which statement best explains the change in the skier’s potential energy?

• The skier loses potential energy as she is lifted up the slope and loses potential energy as she   skies down the slope.
• The skier loses potential energy as she is lifted up the slope and gains potential energy as she   skis down the slope.
• The skier gains potential energy as she is lifted up the slope and loses potential energy as she   skis down the slope.
• The skier gains potential energy as she is lifted up the slope and maintains the same potential   energy as she skies down the slope.

A factory uses a gasoline engine to operate a machine. Which energy transformation took place?

• light energy to heat energy

• electrical energy to sound energy

• chemical energy to mechanical energy

• mechanical energy to electrical energy

Gail’s cross-country coach advised her to eat well-balanced meals in order to have plenty of energy for their upcoming track meet. To which transformation of energy is Gail’s coach referring?

• heat energy to mechanical energy
• electrical energy to sound energy
• mechanical energy to electrical energy
• chemical energy to mechanical energy