Trial Quiz

1. Which is bigger, an atom or a grain of sand?

• The atom is bigger.

• They are the same size.

• The grain of sand is bigger.

• It depends on the kind of atom.

About how many atoms would it take to make a line across this dot? .

• 6

• 600

• 6,000

• 6 million

You drink all of the water from a plastic bottle. You put the cap on the bottle and tighten it. Then you put the bottle in the refrigerator. An hour later, you notice that the bottle is dented. Why is the bottle dented after being cooled in the refrigerator?

• All the molecules of air went out of the bottle

• Heat molecules inside the bottle were destroyed.

• The molecules of air inside the bottle broke down.

• The molecules of air inside the bottle got closer together.

Tags

NGSS.MS-PS1-4

Is air matter? Why or why not?

• Yes, because air is not alive.

• Yes, because air is made up of atoms.

• No, because air cannot be seen.

• No, because air does not take up space.

Tags

NGSS.MS-PS1-1

The diagram below shows the feeding relationships between populations of organisms L, M, and N. The arrows point from the organisms being eaten to the organisms that eat them. Using only the relationships between the organisms shown in the diagram, which of the following statements describes what will happen to the number of Ns if most of the Ls are killed and why?

• The number of Ns will decrease because there are more Ms to eat them.

• The number of Ns will decrease because there will be fewer Ms for them to eat.

• The number of Ns will not change because Ns are not connected to Ls in the diagram.

• More information is needed to tell what will happen to the number of Ns.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which statement describes the molecules of a gas?

• The molecules are soft.

• The molecules do not move.

• The molecules are far apart from one another.

• The molecules are often in contact with one another.

A student places some baking soda and a jar of lemon juice in a plastic bag and seals the bag. She weighs the bag and everything in it. She shakes the bag so that the lemon juice spills out of the jar and mixes with the baking soda inside the bag. The student observes that bubbles form and the bag expands. If the student weighs the bag and everything in it after the bubbling stops and compares the final weight to the starting weight, what will she find out?

• The final weight will be greater than the starting weight because new atoms are produced during the experiment.

• The final weight will be less than the starting weight because some of the atoms are destroyed during the experiment.

• The final weight will be the same as the starting weight because the number of each kind of atom does not change during the experiment.

• The final weight will be the same as the starting weight because some atoms are destroyed, but new ones are created during the experiment.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How do the molecules of hot air differ from the molecules of cold air?

• The molecules of hot air are farther apart than the molecules of cold air.

• The molecules of hot air have less mass than the molecules of cold air.

• The molecules of hot air have more heat molecules mixed with them.

• The molecules of hot air are smaller than the molecules of cold air

Tags

NGSS.MS-PS1-4

Why can gases be compressed more easily than solids?

• Because the molecules of gases are softer than the molecules of solids.

• Because the molecules of gases weigh less than the molecules of solids.

• Because the molecules of gases move faster than the molecules of solids.

• Because the molecules of gases are farther apart than the molecules of solids.

Tags

NGSS.MS-PS2-2

Which of the following is an example of a chemical reaction?

• A marshmallow turning black when heated over a fire

• A powder dissolving in water to make lemonade

• An ice cube melting into a puddle of water

• Salt crystals being crushed into a powder

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5