1st Quarter Science Test

Which best explains why gases can be compressed more easily than solids and liquids?

• Gas particles are closer together.

• Gases are heavier than liquids.

• Gas particles are far apart and move freely.

• Gases have more mass than other states of matter.

Why does a liquid take the shape of its container, while a solid does not?

• Solid particles are always changing shape.

• Liquid particles are tightly packed.

• Solid particles move more freely than liquid particles.

• Liquid particles can move past each other, but solid particles cannot.

Tags

NGSS.MS-PS2-2

A student leaves an ice cube on a table. It melts into water, then evaporates into air. Which statement best explains what happened to the particles?

• They changed into different atoms.

• They gained energy and began moving more freely.

• They became smaller as they changed state.

• They lost energy and slowed down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

What makes crystalline solids different from amorphous solids?

• Crystalline solids contain gas particles.

• Crystalline solids change shape easily.

• Crystalline solids have particles in a repeating pattern.

• Crystalline solids are liquids at room temperature.

Which of the following best shows the connection between particle motion and temperature?

• Particles move slower as temperature increases.

• Particles move faster as temperature increases.

• Temperature has no effect on how particles move.

• Particles in a solid move faster when cooled.

Tags

NGSS.MS-PS1-4

While making lemonade, Mia notices that no matter how much sugar she adds, the extra sugar just sinks to the bottom of the pitcher. Which is the BEST explanation?

• The lemonade is a heterogeneous mixture.

• The lemonade has become saturated.

• The sugar is insoluble in water.

• She needs to stir faster.

Jacob stirs salt into water until it disappears. Later, he leaves the cup by the window, and water evaporates. What will Jacob MOST likely see in the cup after the water is gone?

• Nothing — the salt became part of the water permanently.

• A homogeneous solution.

• Salt crystals left behind.

• Only pure water.

Tags

NGSS.MS-PS1-2

Roy is making hot cocoa. She notices that the cocoa powder dissolves faster when she uses warm milk instead of cold milk. Which is the BEST reason?

• Heat increases the rate at which solute particles dissolve.

• Solvents only work at high temperatures.

• Cocoa powder is insoluble in cold milk.

• Warm liquids have more solvent than cold liquids

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Sam accidentally puts too much sugar into his tea. He keeps stirring, but the extra sugar just stays at the bottom. What should he do to dissolve more sugar?

• Add ice to cool the tea.

• Pour out some tea to make space.

• Heat the tea to increase solubility.

• Add a second solvent to the tea.

Tags

NGSS.MS-PS1-4

During the school carnival, Mia and her friends see two basketballs. One is an actual ball, and the other is a decorative solid plastic ball that's the same size. Without bouncing them, how could they figure out which has the greater density?

• Measure the volume of both balls.

• Drop them to see which one falls faster.

• Compare the weight of each ball while knowing they’re the same size.

• Spin each ball to see which spins longer.