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B
C
D
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100

When we combine two substances, we always form a _________.

What is mixture? 

100

The salt in saltwater is the _____________

What is solute?

100

A chemical reaction is...

What is irreversible?

100

On the pH scale, bleach is a(n)...

What is base?

100

When salt mixes into water, it is...

What is dissolving?

200

When we put sugar in our coffee, we are

adding a ________ to a ___________.

What is solute to a solvent?

200

Dissolve

What is when a substance becomes mixed into a liquid to form a solution where we cannotsee the two substances separately.

200

Surface Tension

What is the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer. This allows insects to walk on water?

200

Carbon dioxide

What is a gas that makes up 0.04 percent of the air in our atmosphere?

200

A mixture?

What is a substance made by mixing other substances together?

300

Two substances that can dissolve in water

What is salt and sugar?

300

Two substances that canNOT dissolve in water

What is chalk and oil?

300

How do you know if a chemical reaction has occured?

What is a chemical reaction has occurred if there is a new substance formed when two substances are mixed together?

300

Carbon dioxide is produced by...

What is it can be produced by burning materials that have carbon in them and then exposing the burning material to oxygen – air?


300

What is the air in our atmosphere made up of?

Mostly nitrogen with a oxygen mixed in. Then small amounts of other gases make up the last 1 percent.

400

What is the difference between soluble and insoluble substances?

What is soluble substances will dissolve into a liquid and insoluble substances will not?

400

Uses of acids and bases

What is we use them to keep us healthy, digest our foods, and start car batteries. They can also be used in cleaners?

400

What evidence tells you that a chemical reaction has occurred?

What is a smell, energy change, gas bubbles, precipitate formation or a change in colour in the new substance?

400

How do you know if matter has changed chemically or physically?

What is if it can be reversed, it is a physical change and if it can’t be reversed, it is a chemical change.

400

Importance of a pH scale

What is so we understand what liquids are and how they can help us and also how dangerous they are?

500

How can we separate substances in a mixture?

What is you could evaporate the liquid in a substance to extract the other substance out. You could also use a filter to filter out a substance.

500

Why is salt mixing with water a physical change?

What is if you let the water sit for a long period of time, it will eventually evaporate and separate from the salt?


500

Give 2 examples of chemical reactions.

What is two examples of chemical changes are an egg boiling in water and food colouring mixing with water. The egg will smell differently and have an energy change as it will heat up. The water that has had food colouring added has a colour change.

500

Give 2 examples of physical reactions.

What is a paper is ripped in half and mixing sand and water?

500

2 examples of bases and 2 examples of acids

Bases: liquid drain cleaner, bleach, ammonia solution, baking soda, sea water

Acids: battery acid, hydrochloric acid, lemon juice, vinegar, grapefruit juice, soda, tomato juice, coffee

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