Energy and Work Quiz

Celia plays center field on the school softball team. She is one of the best hitters on the team. When she swings the bat, she uses ______ to change the ______ of the bat by applying a ______ to it.

• transfer, force, motion

• energy, motion, force

• motion, energy, force

• motion, force, transfer

Tags

NGSS.MS-PS2-2

While Robert was helping his father in the garden, he pushed a shovel into the ground to dig a hole in the dirt. He picked up a shrub, carried it to the hole, and held it while he lowered it into the hole. During which parts of this process does Robert NOT do work? Choose the two statements that apply.

• He pushed a shovel into the ground to dig a hole.

• He picked up a shrub.

• He carried it to the hole.

• He held it while he lowered it into the hole.

Marcus is hanging a porch swing on his front porch. The first thing he has to do is attach two springs to the ceiling. Then, he fastens the swing to the springs so that they can stretch and support the weight of the swing. Which two types of potential energy do the springs have?

• elastic

• gravitational

• kinetic

• stretched

Tags

NGSS.MS-PS3-2

Maria’s class has learned how to drop an egg without breaking it. After 0.2 s, the kinetic energy of the falling egg is 0.5 J. If its mechanical energy is 2.5 J, what is its potential energy?

• 1.8 J

• 2.0 J

• 3.0 J

• 3.2 J

Answer explanation

mechanical energy = potential energy + kinetic energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5

Sunlight enables plants to use water and carbon dioxide during photosynthesis to make and store sugar. Any animal that eats the plants can convert the sugar into the energy it needs to move from place to place. Which three types of energy are involved in this example?

• chemical

• electromagnetic

• kinetic

• thermal

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

NGSS.MS-LS2-3

Chloe is training for her first half-marathon, which requires her to run 21.1 km. Before she runs, she carefully chooses the foods that will give her the energy her body requires for the race. She stands still at the starting line, then she starts running, her body warming up as she runs. Which three energy transformations take place in this example?

• chemical energy to kinetic energy

• chemical energy to thermal energy

• mechanical energy to chemical energy

• potential energy to kinetic energy

Tags

NGSS.MS-LS1-7

NGSS.MS-PS3-5

According to the graph, what is the mechanical energy of the ball wen potential energy is 2 J?

• 0 J

• 5 J

• 20 J to 25 J

• 0 J to 4 J

Tags

NGSS.MS-PS3-1

How would the graph change if the ball rolled to a stop?

Tags

NGSS.MS-PS3-1

Michael loves to play the piano. When he hits a key, energy from the key starts a ______ of energy to ______, to ______, so that you hear the music he plays.

• transformation, a string in the piano, the air

• a string in the piano, transformation, the air

• the air, transformation, a string in the piano

Tags

NGSS.MS-PS3-5

NGSS.MS-PS4-1

Jordan wants to know the difference between using a 60-W and 100-W lightbulb in her lamp. She calculates the energy it would take to use each bulb for 30 days by using this equation: Power = Energy transferred (J)/time (s). What is the difference in the amount of energy transferred by the two bulbs during this time?

• 40 J

• 1200 J

• 1800 J

• 3000 J

Tags

NGSS.HS-PS3-1