According to the atomic theory, all matter is made of

• tiny particles too small to see.

• two or more elements combined.

• two or more compounds combined.

• tiny particles that do not take up space.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which of the mixtures below can you separate using a magnet?

• gravel, rocks, and dirt

• salt and water

• iron filings and sand

• water and food dye

What is energy?

• the use of a force to move an object over a distance

• how well a material conducts an electric current

• a push or a pull

• the ability to cause a change or do work

Which of the following is an example of a force?

• chemical energy

• gravity

• a proton

• light

Tags

NGSS.MS-PS2-4

Which of the following is the term for any complete loop through which electric current flows successfully?

• parallel circuit

• series circuit

• closed circuit

• open circuit

What will MOST LIKELY happen if you increase the force you apply to an object?

• The object's motion will change more.

• The object's motion will change less.

• The force of gravity acting on the object will increase.

• The force of gravity acting on the object will decrease.

Tags

NGSS.MS-PS2-2

Ice changing to liquid water is an example of

• condensation.

• a physical change.

• a chemical change.

• a physical property.

Tags

NGSS.MS-PS1-4

How do wood and helium gas compare?

• Both are the same state of matter.

• Only the helium has a fixed shape.

• Neither have a fixed volume.

• Only the wood has a fixed volume.

Which device uses electric current to intentionally produce light?

• microphone

• blow dryer

• lamp

• toaster

Which object can BEST conduct an electric current?

• a copper nail

• a rubber band

• a strip of cardboard

• a wooden toothpick