Why is the painted end of the needle moved to where it is pointing towards the D-cell?

• Gravity caused the needle to move.

• Electricity moves the needle.

• A magnetic field around the wires move the needle.

• The needle is magnetic.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement best explains which rivet would work best in an electromagnet?

• Brass rivet because brass is a metal

• Iron rivet because iron can be magnetic.

• Aluminum rivet because it is attracted to a magnet

• Steel rivet because steel is attracted to magnets

Students in a class debated whether the thickness of wire made a difference in how many nails an electromagnet could pick up.

Which conclusion could best explain how the thickness of the wire affects the amount of nails pick up?

• Thinner the wire, the more nails picked up.

• The thickness of wire does not affect the amount of nails picked up

• Thicker the wire, the more nails picked up.

Tags

NGSS.MS-ETS1-3

Two people decided to start a new business.   They wanted to design electromagnetic doorbells.  

Which parts below will make the electromagnetic bell work properly?

Three answers

• The number of winds of wire on the electromagnet’s core.

•   The color of the bell.

• The space between the striker terminal and the electromagnet.

•  The size of the doorbell button.

• The thickness of the wire used for the electromagnet.

Tags

NGSS.MS-PS2-3

The telephone replaced the telegraph as the most popular way to communicate over long distances. 

Which improvement best explains what the telephone did?

• Have a more secret code.

• Use an electromagnet to make sound.

• send more than one message at a time.

• No use of electric energy

Tags

NGSS.MS-ETS1-1

Jeremy has a pond in his backyard. He noticed that the water on the surface feels warmer in the afternoon when the pond is not shaded. He wants to design an experiment to observe that transfer of energy from the sun to the water. 

Which statement best explains how the energy is being transferred?

• He should observe the area of the pond's surface that the light covers over the course of the day.

• He should observe the surface of the water for any changes in its motion in the morning and the afternoon.

• He should measure the temperature of the water's surface before and after the sun's light has been shining on it. 

• She should observe the temperature outside each day for four days.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Invent a new way to send information to someone far enough away that they cannot hear  you shout.  

What materials would you use to create some sort of signal?

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-4

Which energy conversion happens in Step 1?

• Solar energy is converted to light energy.

• Heat energy is converted to solar energy.

• Electrical energy is converted to heat energy.

• Solar energy is converted to electrical energy

What is true about wind and solar power?

• Both are always available and are renewable.

• Both are limited, but they are both renewable.

• Both are nonrenewable and limited.

• Both are nonrenewable and available all the time.

Which shows energy transfers from place to place by light?

• Energy from the Sun is used to heat up the liquid that resists freezing.

• The liquid that resists freezing is used to heat up the water in the water heater.

•  Energy from the hot water is used to heat up the room heaters.

Tags

NGSS.MS-ESS2-4