Energy and Electricity

An object has a type of energy due to the movement of electrons. Which type of energy is it?

•         

      electrical

     

•   chemical

• thermal

• mechanical

Tags

NGSS.MS-PS2-3

After walking across a carpet, a boy feels a spark between his hand and a doorknob.

If the boy’s hand is negatively charged just before he touches the doorknob, which particles moved from the carpet to his hand?

• atoms

    

•   electrons

     

• neutrons

•     protons

Tags

NGSS.MS-PS2-3

The girl shown below is using an electrical appliance that has a motor.

Which energy transformation is she using?

•  electrical energy into heat energy and energy of motion

• electrical energy into sound energy and chemical energy

• sound energy into electrical energy and energy of motion

• energy of motion into electrical energy and sound energy

Tags

NGSS.MS-PS1-4

Sidney wants to make an electric circuit. She gathers the items shown below.

What additional item does Sidney need to make a complete circuit?

• a battery

     

• a switch

   

•    an insulator

    

•   a conductor

Tags

NGSS.MS-ETS1-1

What kind of energy does a thermometer measure?

• chemical energy

     

• electrical energy

     

     

•     light energy

     

• thermal energy

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Plants need light energy to grow. Which would be the best way to show that plants need light?

• Grow a plant in the dark and observe its growth.

• Put plants under different kinds of light and compare how they grow.

• Find plants that have grown in sunlight and measure the height of each one.

• Grow plants with light and plants without light and compare how they grow.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

What form of energy cooks food in a solar cooker?

   

• chemical energy

     

• electrical energy

     

• light energy

    

•   mechanical energy

Tags

NGSS.MS-PS4-2

Why do two socks sometimes stick together in a dryer?

   

• Both socks have a positive charge.

•   Both socks have a negative charge.

• Protons move from one sock to another.

• Electrons move from one sock to another.

Tags

NGSS.MS-PS2-3

         A material that allows an electric current to flow through it is an electrical conductor. A material through which an electric current cannot flow easily is called an insulator. Which claim best describes the difference between an insulator and a conductor?

• An insulator has a static charge, and a conductor does not.

• A conductor contains more electrons than an insulator.

• A conductor is a metal, and an insulator is any material that is not a metal.

•   An insulator does not have electrons that are free to move, and a conductor does.

An electric clock in a classroom will not run if it is not plugged into an electric outlet. What does the clock get from the electric current from the outlet?

  

• batteries

•     chemicals

• energy

• time of day

Tags

NGSS.MS-PS3-5