Basic Science and Technology – Primary 6 Weekly Short Class Lesson Notes for Second Term

WEEK 6 – COLOUR – PRIMARY AND SECONDARY COLOURS | RAINBOW COLOURS AND NATURAL COLOURS

COLOUR

Colour is what we see when light falls on an object. Different objects reflect different colours.

Example – A red apple looks red because it reflects red light.

 

RAINBOW COLOURS

A rainbow is formed when sunlight passes through raindrops and is split into different colours.

The 7 colours of the rainbow (in order) are:

1. Red

2. Orange

3. Yellow

4. Green

5. Blue

6. Indigo

7. Violet

Mnemonic to remember – Rich Old Young Girls Buy Ice Very often (ROYGBIV)

 

PRIMARY AND SECONDARY COLOURS

PRIMARY COLOURS

Primary colours are colours that cannot be made by mixing other colours.

1. Red

2. Blue

3. Yellow

These are the building blocks for all other colours.

 

SECONDARY COLOURS 

Secondary colours are made by mixing two primary colours:

Red + Blue = Purple (Violet)

Red + Yellow = Orange

Blue + Yellow = Green

Summary – Colour is what we see when light falls on an object. The rainbow has seven colours: red, orange, yellow, green, blue, indigo, violet. Primary colours are red, blue, yellow, and secondary colours are orange, green, purple.

 

NATURAL COLOURS

Natural colours are the colours we get from nature. They come from plants, animals, minerals, and soil.

Examples:

1. Green – from leaves and grass

2. Brown – from soil or tree bark

3. Yellow – from flowers like sunflowers

4. Red – from clay or certain fruits

 

CHARACTERISTICS OF NATURAL COLOURS 

Natural colours have some special characteristics:

1. Non-toxic – It is safe to use for food, clothes, or art

2. Environmentally friendly – It do not pollute the environment

3. Fade with time – They may lose their brightness when exposed to sunlight

4. Easily available – It can be obtained from plants, soil, fruits, and flowers

5. Unique shades – They often have soft, earthy tones rather than very bright artificial colours

Summary – Natural colours are colours obtained from nature, such as green from leaves and brown from soil. They are safe, environmentally friendly, and  fade with time.

 

10 MULTIPLE CHOICE QUESTIONS AND ANSWERS ON COLOUR – PRIMARY AND SECONDARY COLOURS | RAINBOW COLOURS AND NATURAL COLOURS

INSTRUCTION – Choose the correct answer from the options A – D. 

1. Which of these is a primary colour?

A. Green

B. Purple

C. Blue

D. Orange

 

2. Which two primary colours are mixed to make green?

A. Red + Blue

B. Blue + Yellow

C. Red + Yellow

D. Yellow + Orange

 

3. How many colours are there in a rainbow?

A. 5

B. 6

C. 8

D. 7

 

4. Which colour comes first in a rainbow?

A. Violet

B. Red

C. Blue

D. Green

 

5. Secondary colours are made by ______. 

A. Mixing two primary colours

B. Mixing two secondary colours

C. Mixing a primary and secondary colour

D. Mixing black and white

 

6. Which of these is a secondary colour?

A. Blue

B. Red

C. Yellow

D. Green

 

7. Natural colours can be obtained from ______. 

A. Soil, plants, and fruits

B. Paints only

C. Plastic and metal

D. Cloth and paper

 

8. One characteristic of natural colours is that they are ______. 

A. Toxic

B. Bright and artificial

C. Safe and environmentally friendly

D. Made in factories only

 

9. Which primary colours are mixed to make orange? 

A. Red + Blue

B. Red + Yellow

C. Blue + Yellow

D. Green + Yellow

 

10. Yellow, blue, and red are called ______. 

A. Secondary Colours

B. Tertiary colours

C. Rainbow colours

D. Primary colours

 

FILL IN THE GAP QUESTIONS

11. Colour is what makes objects look ______ to our eyes.

12. There are ______ colours in the rainbow.

13. The primary colours are red, blue, and ______.

14. Mixing red and yellow gives the secondary colour ______.

15. Colours that come from plants, animals, or minerals are called ______ colours.

 

SHORT ANSWER QUESTIONS

16, What is colour?

17. Name the seven colours of the rainbow.

18. What are primary colours?

19. Mention two secondary colours.

20. Give one example of a natural colour.

 

ANSWER KEYS 

1. C 2. B 3. D 4. B 5. A 6. D 7. A 8. C 9. B 10. D 11. different 12. seven 13. yellow 14. orange 15. natural

16, Colour is the appearance of an object as seen by the eyes.

17. Red, Orange, Yellow, Green, Blue, Indigo, and Violet.

18. Primary colours are colours that cannot be mixed to form other colours.

19. Green and purple.

20. Brown from soil (or green from leaves).

 

WEEK 7 – MID TERM BREAK –Mid Term Break is now in Week 8. Week 8 lesson will now be carried out in week 7.