Quiz about Chemical Changes Review

Question 1

Burning wood is a

Accepted Answer

chemical change

Answer

physical change

Question 2

Broken glass is a

Accepted Answer

physical change

Answer

chemical change

Question 3

Melting butter for popcorn is a

Accepted Answer

physical change

Answer

chemical change

Question 4

An ice pack getting cold after you put it in the freezer for an hour is a

Accepted Answer

physical Change

Answer

chemical Change

Question 5

A change in the size, shape, or state of matter.

Accepted Answer

physical change

Answer

chemical change

Question 6

Which of the following is NOT an example of a physical change?

Accepted Answer

sour milk

Answer

crumpling paper

Answer

sharpening a pencil

Answer

clothes shrinking

Question 7

A change in which NEW substances are formed.

Accepted Answer

Chemical change

Answer

Physical change

Question 8

Which of the following is NOT an example of chemical change?

Accepted Answer

breaking a pencil

Answer

sour milk

Answer

burning wood

Answer

rust

Question 9

Salt dissolved in water is a

Accepted Answer

physical change

Answer

chemical change

Question 10

Chewing food is a

Accepted Answer

physical change

Answer

chemical change

Question 11

A chemical change (or chemical reaction) occurs when ....

Accepted Answer

when one or more substances are transformed into different substances

Answer

no substance are transformed into different substances

Question 12

if there is a change in color, production of light, production of heat, production of gas, production of smell or formation of a new substance.

Accepted Answer

chemical change

Answer

physical change

Question 13

What does it mean when there is a physical change?

Accepted Answer

Matter has changed size, shape or form.

Answer

Matter has change from one substance into another.

Answer

Matter has change on the molecular level

Answer

A new substance has been formed.

Question 14

What is an exothermic reaction?

Accepted Answer

heat is released and temp rises

Answer

heat is released and temp lowers

Answer

heat is absorbed and temp rises

Answer

heat is absorbed and temp decreases

Question 15

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

Accepted Answer

burning a piece of paper

Answer

cutting a piece of paper

Answer

folding a piece of paper

Answer

tearing a piece of paper

Question 16

A cup of water is left outside for two days. When it was checked there was only half a cup left. What happened?

Accepted Answer

evaporation; physical change

Answer

evaporation; chemical change

Answer

condensation; physical change

Answer

condensation; chemical change

Question 17

Rust on a bike is an example of chemical change.

Accepted Answer

True

Answer

False

Question 18

Rotting fruit produces a bad smell. This happens because the fruit is experiencing a

Accepted Answer

chemical change

Answer

physical change

Question 19

What is an endothermic reaction?

Accepted Answer

heat is absorbed and the temp decreases.

Answer

heat is absorbed and the temp increases

Answer

heat is released and the temp rises.

Answer

heat is released and the temp decreases

Question 20

What is a catalyst?

Accepted Answer

is a substance that helps a reaction happen but does not change during the reaction.

Answer

is a substance that does not help a reaction happen but changes during the reaction.

Answer

is a substance that helps a reaction happen but changes during the reaction.

Answer

is a substance that helps a reaction happen but changes during the reaction.

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