38-39: Putting Elements Together (Foundation)

Question 1

What does air contain?

Answer 1

Oxygen, Nitrogen and Carbon Dioxide gases

Question 2

What are clouds made from?

Answer 2

Tiny water droplets

Question 3

What is a compound?

Answer 3

A substance made from different elements that are cehmically bonded together

Question 4

How are compounds different from the elements that they are made from?

Answer 4

The have very different properties

Question 5

Are Iron and Sulfur elements?

Answer 5

Yes

Question 6

What happens between Iron and Sulfur when a chemical reaction takes place?

Answer 6

They bond together to make Iron Sulphide

Question 7

A substance which contains two or more elements joined together is called…?

Answer 7

A compound

Question 8

Compounds have different __________ from the elements the contain

Answer 8

Properties

Question 9

Many compounds are formed by __________ reactions between elements

Answer 9

Chemical

Question 10

How can we make a chemical reaction happen faster?

Answer 10

Add heat

Increase the pressure

Question 11

What do we call the substances we have at the beginning of a chemical reaction?

Answer 11

Reactants

Question 12

What do we call the substances that we have at the end of a chemical reaction?

Answer 12

Products

Question 13

How do we know when a chemical reaction is taking place?

Answer 13

Heat released
Light given off
Gases released
Colour changes