Grade 9 Natural Sciences

Unit 1 – Cells as basic unit of life

Answers for Activity 2 on page 16 an for Exercise 1 on page 22

Unit 3- The human reproduction system

Answers for Exercise 8 on page 130 and Exam questions on page 137

Unit 2

The Digestive system – Answers for Activity 5 on page 44 and Exercise 2 on page 45

The Circulatory system – Answers to Activity 6 on page 62 and Exercise 4 on page 63

The respiratory system – Answers to Activity 8 on page 72 and Exercise 5 on page 73

Term 2 – Matter and materials

Unit 1 – Compounds and chemical reactions

The following PDF’s are the answers for unit one.

Unit 2 – Metals and Non-metals

The following PDF’s are the answers for unit two

Unit 3 – Acids and bases

The following PDF’s are the answers for unit three

Term 3 – Energy and change

Unit 1 – Forces

The following is the answers for Exercise 16, 17 and unit 1 exam questions.

Unit 2 – Cells

The following is the answers for Exercise 18 and unit 2 exam questions.

Unit 3 – Series and parallel circuits

The following is the answers for Exercise 19 and unit 3 exam questions.

Unit 4- Safety with electricity

The following is the answers for Exercise 20 and unit 4 exam questions.

Unit 5 – National electricity grid

The following is the answers for Exercise 21 and the exam questions of unit 5.

Unit 6 – Cost of electrical power

The following is the answers for Exercise 22 and the exam questions of unit 6.

Term 4 – Earth and beyond

Earth as a system

The following is the answers for Activity 17

Unit 1 – Lithosphere

The following is the answers for Exercise 23, 24 and the exam questions for Unit 1.

Unit 2 – Atmosphere

The following is the answers for Exercise 25 and the exam questions for unit 2.