Grade 6 Test 1 Review

Which two types of matter are pure substances?

• homogenous mixtures and elements 

• solutions and compounds

• elements and compounds

• mixtures and elements

Answer explanation

Elements and compounds are pure substances because they consist of only one type of particle. Homogeneous mixtures and solutions contain multiple substances, while mixtures can include various components.

Tags

NGSS.MS-PS1-1

Unlike an element, a(n) ________ may be separated through a physical process like filtration.

• mixture

• compound

• atom

• molecule

Answer explanation

A mixture consists of two or more substances that can be separated by physical means, such as filtration. In contrast, compounds, atoms, and molecules are chemically bonded and cannot be separated through physical processes.

Lemonade contains lemon juice and sugar dissolved in water. What is the solvent in lemonade?

• water

• lemon juice

• sugar

• There is no solvent in lemonade

Answer explanation

In lemonade, the solvent is the substance that dissolves the solutes. Water is the primary component that dissolves both lemon juice and sugar, making it the correct answer.

Which state of matter has no definite volume and no definite shape?

• solid

• liquid

• gas

• plasma

Answer explanation

A gas has no definite volume and no definite shape, allowing it to expand and fill any container. In contrast, solids have a fixed shape and volume, while liquids have a definite volume but take the shape of their container.

Tags

NGSS.MS-PS1-4

All matter is composed of

• atoms

• ions

• molecules

• mixtures

Answer explanation

All matter is composed of atoms, which are the basic building blocks of matter. While ions, molecules, and mixtures are important in chemistry, they are formed from atoms, making atoms the fundamental unit of matter.

Tags

NGSS.MS-PS1-1

Which state(s) of matter have definite volume?

• solid only

• solid and liquid

• liquid only

• liquid and gas

Answer explanation

Solids and liquids both have a definite volume. Solids maintain their shape and volume, while liquids take the shape of their container but still have a fixed volume. Gases, however, do not have a definite volume.

Anything that has mass and takes up space...

• weight

• matter

• light

• volume

Answer explanation

The correct answer is 'matter' because it is defined as anything that has mass and occupies space. Weight refers to the force of gravity on an object, light is electromagnetic radiation, and volume measures the space an object occupies.

Tags

NGSS.MS-PS1-5

Which of the following IS an example of matter?

• sunlight

• magnetism

• gravity

• clouds

Answer explanation

Clouds are made up of water vapor and particles, which are forms of matter. In contrast, sunlight, magnetism, and gravity are not matter; they are forms of energy or forces.

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

• solid

• liquid

• gas

• plasma

Answer explanation

A solid has a definite shape and a definite volume, unlike liquids and gases which take the shape of their container and can change volume. Therefore, the correct answer is solid.

Which state of matter takes the shape of its container and has a definite volume?

• solid

• liquid

• gas

• plasma

Answer explanation

A liquid takes the shape of its container while maintaining a definite volume. Unlike gases, which expand to fill their container, and solids, which have a fixed shape, liquids adapt to their surroundings but do not change volume.