ELEMENTS, COMPOUNDS & MIXTURES

ELEMENTS, COMPOUNDS & MIXTURES

7th Grade

26 Qs

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ELEMENTS, COMPOUNDS & MIXTURES

ELEMENTS, COMPOUNDS & MIXTURES

Assessment

Quiz

Science

7th Grade

Medium

NGSS
MS-PS1-1, MS-PS1-5, MS-PS1-2

Standards-aligned

Created by

Ms. Smith

Used 8+ times

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26 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

Oxygen is more reactive than air.

Oxygen has a higher density than air.

Oxygen goes under a phase change, whereas air is always a gas.

Oxygen contains only one substance, but air contains several substances.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of of a container filled with a pure substance rather than with a mixture?

A tire filled with air.

A jar filled with salt water.

A balloon filled with helium.

A glass filled with chocolate milk.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which changes MUST happen for elements to become a compound?

elements are heated

a gas becomes a liquid

elements dissolve in water

chemical bonds form between atoms.

Tags

NGSS.MS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Water (H2O), is not found on the periodic table because water is a...

atom

liquid

mixture

compound

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following explains why saltwater is considered a mixture?

It is composed of one element.

It is composed of one compound.

It is composed of two or more substances and has new chemical properties.

It is composed of two or more substances and retains their own chemical properties.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?

an atom.

an element.

a compound.

a mixture.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

This image is a model of...

an element

a compound

a homogenous mixture

a heterogeneous mixture

Tags

NGSS.MS-PS1-1

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