Energy

On a hot day, Jeremy walked home from the grocery store with a bag of chocolate chips while listening to music. When he arrived home the chocolate chips had melted in the bag. Why did the chocolate chips melt?

• The mechanical energy of walking home melted the chocolate chips.

• The thermal energy of the sun during the walk home melted the chocolate chips.

• The sound energy of listening to music melted the chocolate chips.

• The light energy of the sun during the walk home melted the chocolate chips.

Tags

NGSS.MS-PS1-4

A student made a list of ways electrical energy is used at home.

Which of these is NOT an object that uses electrical energy?

• alarm clock

• coffee pot

• skateboard

• microwave

A bell was placed by the cash register in a busy store. Customers tap the bell to ring it when they are ready to pay for their purchases.

Which type of energy causes the bell to ring?

• Sound energy causes the bell to ring.

• Electric energy is used to ring the bell.

• Customers use the sense of touch to make the sound.

• Mechanical energy is used to tap the bell and produce sound.

Tags

NGSS.MS-PS4-1

Which of the following is the best example of a student using electrical energy?

• Using scissors to cut a piece of yarn

• Writing down the homework assignment

• Knocking on the classroom door

• Turning on the light in the classroom

Which household appliance uses electrical energy to produce thermal energy?

• calculator

• gas clothes dryer

• hair dryer

• telephone

Tags

NGSS.MS-PS3-3

Which item, when placed in the gap below would allow the light bulb to turn on?

• plastic comb

• metal pin

• wooden toothpick

• rubber ball

A class poured 90 degree water in three different cups and let them sit for 30 minutes. The students recorded the beginning and ending temperatures in the chart.

Based on the information, which item is the BEST insulator of thermal energy?

• the cup made of plastic

• the cup made of styrofoam

• the cup made of glass

• they all insulate the same

Tags

NGSS.MS-PS3-3

Copper wires are great conductors of electricity and are used to carry currents throughout homes.

Around the outside of the wire is a plastic coating. What property does the plastic have that makes it a useful coating around the copper wires?

• Electrical conductor

• Electrical conductor

• Electrical insulator

• Thermal insulator

A student recorded the chart below in a journal.

Which title would BEST replace the letters X and Y?

• X: Magnetic

  Y: Soluble

• X: Conductors

  Y: Insulators

• X: Conductors

  Y: Insulators

• X: Metals

  Y: Plastics

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student was testing insulators and conductors by using the circuit below.

If the light bulb has NOT turned on after creating a closed circuit, which of the following have you attached between the two wires?

• a rubber band

  a block of wood

• a penny

  a rubber band

• a metal paper clip

  a rubber band

• a penny

  a block of wood

Tags

NGSS.MS-PS2-3