Chemical Changes & Reactions

Chemical Changes & Reactions

8th Grade

20 Qs

quiz-placeholder

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Chemical Changes & Reactions

Chemical Changes & Reactions

Assessment

Quiz

Science

8th Grade

Medium

Created by

Frank Pecora

Used 2+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

Which of the following models best demonstrates a balanced chemical equation?

F
G
H
J

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

The shape of the coal changes
Oxygen is present
A new substance is produced
Coal is made up of more than one element

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

_________ is (are) made of more than one atom.

A molecule
Protons
Neutrons
An element

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which is an example of a physical change?

Burning wood
Freezing water
Rust on a car
Cooking food

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

the starting materials in a chemical reaction

Products
Reactants
Starters
Enders

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which of Mark’s observations would show that a burning candle is a chemical reaction?

Black smoke is given off; hot gases are rising.

The wax starts to melt.

The candle is white and made of wax and a wick.

Time passes one minute at a time.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When two or more different elements are chemically combined.

Mixture

Element

Solution

Compound

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