Unit 1: Matter

When rain freezes and turns to ice or sleet, this is an example of a

• physical property

• chemical property

• physical change

• chemical change

Tags

NGSS.MS-PS1-4

Two substances are combined. Gas is released, and a tall, black column forms. This is an example of a

• physical property

• chemical property

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

Which answer below is an example of two physical properties of matter?

• weight and toxicity

• mass and reactivity

• mass and volume

• mass and pH

Conductivity:

• tends to be high in nonmetals

• describes how metals can be flattened into a sheet

• measures the ability of a material to pass an electrical current

• tends to be low in metals

A cylinder has a density of 9 g/cm³. If the cylinder is cut in half, what would the density of the first half be?

• 4.5 g/cm³

• Density is an intensive property, so it would still be 9 g/cm³.

• 18 g/cm³

• None of these are correct.

To compress means to be squeezed or pressed together. Why is a gas easily compressible, but solids are not?

• Gas particles are much smaller.

• Particles in a solid are not strongly attracted to one another.

• Molecules in a solid are much larger.

• Particles in a gas are much farther apart compared to a solid.

Which state of matter has an indefinite shape and a definite volume?

• liquid

• solid

• gas

• plasma

Which state of matter has an indefinite shape and an indefinite volume?

• liquid

• solid

• gas

• plasma

If a salad dressing with water and vinegar looks the SAME throughout (has a consistent color and texture), it would be an example of a

• heterogeneous mixture

• pure substance

• compound

• homogeneous mixture

TRUE or FALSE: A salt water solution will look the same throughout.

• True

• False