Unit 2 Chapter 2

A cook has containers with several yellow substances in them. He cannot tell them apart by looking at them. Which would help him determine the properties of each substance?

• Smell of the substances

• Taste of the substances

• Test if they dissolve in certain liquids

• All of the above

A group of students made a model showing a type of matter. Which of the following describes what is shown by the model?

• Particles that make up a specific color

• Particles that make up a liquid

• Particles that make up heat

• Microscopic pieces of ice inside a glass of water

Tags

NGSS.MS-PS1-1

A glass of orange juice is sitting on a table. Which best describes the matter in the juice?

• It is made up of only one type of molecule

• It is not made up of matter

• It was made up of more than one type of molecule

• It is not made up of any molecules

Tags

NGSS.MS-PS1-1

Tim is making koolaid. He pours the powder into a glass of water and mixes it. Terry claims that even though he can no longer see the powder after it mixes, it is still in there. Which of the following would support his claim?

• When the molecules of a solid aren’t attracted to the molecules of a liquid, they spread apart and mix together evenly.

• When the molecules of a solid are attracted to the molecules of a liquid, they spread apart and mix together evenly.

• When the molecules of a solid are attracted to the molecules of a liquid, they cluster together as a solid.

• None of these.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which statement about solids and liquids is true?

• Some solids will dissolve in liquids, others do not.

• Solids and liquids are made up of different molecules so their molecules are never attracted to each other.

• All solids will dissolve in liquids.

• When mixing liquids and solids, sediments will always appear at the bottom of the container.

Citric Acid is ____________ because it dissolves in water.

• matter

• mixture

• soluble

• information

A scientist finds an unknown mineral. She calls it mineral X. She makes observations to identify characteristics of the mineral.

Which statement does not explain that mineral X is made of particles that are too small to see?

• The scientist observes mineral X with her eyes. At this scale, mineral X appears to be groups of metallic whiskers.

• The scientist then uses a strong microscope to look at mineral X. Under the strong microscope, mineral X appears to be a thin piece of material that is coiled up.

• The scientist then looks at mineral X under an even stronger microscope. Under the very strong microscope, each thin piece of material seems to be made of stacks of smaller layers.

• Even at this very strong scale, the scientist cannot identify individual particles in the stacks.

Tags

NGSS.MS-PS1-1

Which of the following are observable properties of matter? Select four properties.

• size

• color

• flavor

• smell

• texture

Tags

NGSS.2-PS1-1

Here is a model of cinnamon molecules and water molecules. Do the cinnamon molecules dissolve in water? How do you know?

• Yes; the molecules attract to each other

• No; the molecules are not attracted to each other.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Are the molecules in this simulation mostly mixed, not mixed, or completely mixed?

• mostly mixed

• not mixed

• completely mixed

Tags

NGSS.MS-PS1-1