A mixture of sand and iron filings is in a bowl. If both substances keep the same physical properties after being mixed together, how could the mixture be separated?

• Stir in water

• Pour through a sieve

• Separate with tweezers

• Use a magnet

Day and night are caused by–

• the movement of the Moon around Earth.

• the movement of Earth around the Sun.

• the rotation of the Moon on its axis.

• the rotation of Earth on its axis.

Tags

NGSS.MS-ESS1-1

Which of the following objects would be attracted to a magnet?

• A copper wire

• An iron nail

• A cotton string

• A silver coin

Students are exploring how to create a simple circuit. What materials are needed to create a working simple circuit?

• Yarn, a light bulb, a battery, and a switch

• A copper wire, a light bulb, and a battery

• A light bulb, two batteries, and a switch

• A copper wire, a light bulb, and a switch

A student built a circuit but was disappointed to see that the light did not light up. How should the student fix their circuit so that the bulb lights up?

• The student should use a stronger battery.

• The student should use a brighter light bulb.

• The student should close the switch.

• The student should add more wires to connect the parts of the circuit.

Tags

NGSS.MS-PS3-5

Which statement about matter is NOT true?

• Matter is made of tiny particles.

• The physical states of matter are solid, liquid, and gas.

• All matter is visible.

• Matter can be described by physical properties.

Which of the following materials is a good conductor of electricity?

• A rubber band

• A wooden spoon

• A paper clip

• A pencil

What is missing from the electric circuit shown?

• Insulated wires

• A closed switch

• An open switch

• A battery as a power source

Which is the best definition of solubility?

• Prevents the transfer of electrical energy

• Uses a balance or scale

• The amount of matter in an object

• The ability of a material to dissolve in water

Which of the following are caused by Earth’s rotation? Select two answers.

• Day and night

• Weather patterns and storms

• The different seasons

• Changing shadows

Tags

NGSS.MS-ESS2-6