Chemistry Exam Fall 2024

What is matter defined as?

• Anything that has mass and volume

• Anything that has energy

• Anything that is visible

• Anything that is solid

Answer explanation

Matter is defined as anything that has mass and volume. This means it occupies space and has weight, distinguishing it from energy, visibility, or being solid, which do not encompass all forms of matter.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

Which of the following is NOT considered matter?

• Air

• Water

• Light

• Rock

Answer explanation

Light is not considered matter because it does not have mass or occupy space, unlike air, water, and rock, which are all forms of matter.

What is the SI unit for mass?

• Gram (g)

• Kilogram (kg)

• Meter (m)

• Liter (L)

Answer explanation

The SI unit for mass is the kilogram (kg), which is the standard unit used in scientific measurements. The gram (g) is a subunit of the kilogram, while meter (m) and liter (L) are units for length and volume, respectively.

Label the states of matter

a

b

c

ice

liquid

solid

gas

Tags

NGSS.5-PS1-1

NGSS.5-PS1-3

What is a pure substance?

• Matter with a uniform and definite composition

• A mixture of multiple components

• A substance that can be separated by physical means

• A type of mixture like aspirin

Answer explanation

A pure substance is defined as matter with a uniform and definite composition, meaning it has consistent properties throughout. This distinguishes it from mixtures, which contain multiple components.

Tags

NGSS.MS-PS1-1

Which of the following is an example of a physical property?

• Conductivity

• Chemical reactivity

• Combustibility

• Flammability

Answer explanation

Conductivity is a physical property that describes a material's ability to conduct electricity. In contrast, chemical reactivity, combustibility, and flammability are all chemical properties related to how substances interact and change.

Tags

NGSS.MS-PS1-4

What is an extensive property?

• A property that depends on the amount of matter

• A property that is independent of the amount of matter

• A property that changes with temperature

• A property that is intrinsic to the material

Answer explanation

An extensive property is one that depends on the amount of matter present. Examples include mass and volume, which change as the quantity of material changes.

Which of the following is an example of an intensive property?

• Density

• Mass

• Volume

• Weight

Answer explanation

Density is an intensive property because it does not depend on the amount of substance present. In contrast, mass, volume, and weight are extensive properties that change with the quantity of material.

What are the primary states of matter?

• Solid, liquid, gas

• Solid, liquid, plasma

• Liquid, gas, plasma

• Solid, gas, plasma

Answer explanation

The primary states of matter are solid, liquid, and gas. Solids have a definite shape, liquids take the shape of their container, and gases fill the available space. Plasma is a fourth state but not primary in this context.

Tags

NGSS.MS-PS1-4

What is a characteristic of a solid state of matter?

• Solids have a definite shape and volume.

• Solids take the shape of their container.

• Solids have particles that move freely.

• Solids have high compressibility.

Answer explanation

Solids have a definite shape and volume, meaning they maintain their form and do not conform to the shape of their container. This distinguishes them from liquids and gases, which do not have fixed shapes.