Grade 6 Science English Medium Past Papers with answers Second Term Test Royal College Colombo 07 textbook download pdf notes

### Page 1

#### Multiple Choice Questions

1. The substance which attracts towards a magnet is:

- i) carbon

- ii) brass

- iii) lead

- iv) steel

Answer: iv) steel

Explanation: Steel is a ferromagnetic material and is attracted to magnets, unlike carbon, brass, and lead which are not magnetic.

2. Which of the following is not considered as a bio-mass?

- i) Rotten vegetables and fruits

- ii) Dried cow dung

- iii) Firewood

- iv) Tar

Answer: iv) Tar

Explanation: Biomass refers to organic materials from plants and animals. Tar is a byproduct of fossil fuels, not biomass.

3. Select the answer which contains only renewable energy sources:

- i) wind, flowing water, sea waves

- ii) Sun, wind, fossil fuels

- iii) wind, geothermal energy, fossil fuels

- iv) Petroleum oil, biomass, coal

Answer: i) wind, flowing water, sea waves

Explanation: Renewable energy sources can be replenished naturally. Fossil fuels and petroleum oil are not renewable.

4. Given two bar magnets Y and Z that repel when moved towards each other. The pole of 'Z' which moved towards 'Y' may be:

- i) South pole

- ii) North pole

- iii) unlike poles

- iv) cannot be identified properly

Answer: ii) North pole

Explanation: Like poles repel each other, so if Z repels Y, they must have the same pole, which would be North.

5. Which of the following is not a correct example of the sustainable use of energy sources?

- i) Switching off unnecessary bulbs

- ii) Using energy sources that can be used again and again

- iii) Opening the refrigerator door frequently

- iv) Using solar thermal cookers

Answer: iii) Opening the refrigerator door frequently

Explanation: Frequent opening of the refrigerator door wastes energy and is not sustainable.

### Page 2

6. Which of the following is the basic characteristic of micro-organisms?

- i) Invisible to the naked eye when taken individually

- ii) All micro-organisms cause infectious diseases in animals

- iii) All micro-organisms grow in water

- iv) All micro-organisms locomote in various ways

Answer: i) Invisible to the naked eye when taken individually

Explanation: The primary characteristic of micro-organisms is that they are microscopic and cannot be seen without magnification.

7. Select the correct statement about the activity involving light and a rubber tube:

- i) Light can be observed through the rubber tube

- ii) Light cannot be observed through the curved tube because light is transmitted only in straight lines

- iii) The light source used is not a luminous object

- iv) Light cannot be observed even when a PVC tube is used instead of the rubber tube

Answer: ii) Light cannot be observed through the curved tube because light is transmitted only in straight lines

Explanation: Light travels in straight lines and cannot bend around curves.

8. The gas produced using rotten vegetables, rotten fruits, hay, and animal waste is:

- i) bio gas

- ii) hydrogen gas

- iii) liquid petroleum gas

- iv) oxygen gas

Answer: i) bio gas

Explanation: Biogas is produced through the anaerobic digestion of organic matter like vegetables, fruits, hay, and animal waste.

9. Large volumes of gases are stored in small cylinders. Which characteristic of gases is used in this process?

- i) Gases do not have a definite mass

- ii) Gases can be stored by applying high pressure

- iii) Gases having a definite volume

- iv) Gases having a definite shape

Answer: ii) Gases can be stored by applying high pressure

Explanation: Gases can be compressed to occupy smaller volumes under high pressure.

10. Select the incorrect statement about magnets:

- i) The magnetic power is evenly spread all over a magnet

- ii) The north pole is indicated by red color

- iii) Like poles (same poles) get repelled

- iv) A small magnet is used in a compass as the indicator

Answer: i) The magnetic power is evenly spread all over a magnet

Explanation: The magnetic strength is strongest at the poles, not evenly spread across the magnet.

### Page 3

11. Select the activity which does not affect the loss of hearing:

- i) Inserting foreign objects into the ear

- ii) Itching the ear by using different things

- iii) Wearing safety equipment when exposed to loud sounds

- iv) Using earphones for more than one hour per day

Answer: iii) Wearing safety equipment when exposed to loud sounds

Explanation: Wearing safety equipment protects hearing and does not cause loss of hearing.

12. A plant which grows in water is:

- i) Icornia (Bimthamburu)

- ii) Ranawara

- iii) Lotus

- iv) Cashew

Answer: iii) Lotus

Explanation: The Lotus is an aquatic plant.

13. Surface water cannot be seen in:

- i) oceans

- ii) rain

- iii) lakes

- iv) waterfalls

Answer: ii) rain

Explanation: Rain falls from the sky and is not typically referred to as surface water.

14. Select the answer with correct examples for (a) and (b):

- i) Gecko, earthworm

- ii) Jack tree, Guava tree

- iii) Jack tree, fish

- iv) Cuttlefish, grass plant

Answer: i) Gecko, earthworm

Explanation: Geckos and earthworms have limited growth, unlike plants which have unlimited growth potential.

15. Select the incorrect statement about the activity with the 'rabana':

- i) Rabana is a sound-producing equipment

- ii) Vibration of the hide (membrane) of the 'rabana' can be observed by movement of pieces of paper on it

- iii) Sound is produced by the vibration of something

- iv) A deep sound comes out when the hide is contracted

Answer: iv) A deep sound comes out when the hide is contracted

Explanation: Sound is produced when the hide vibrates, not when it is simply contracted.

16. The gaseous state of water is:

- i) snow

- ii) springs

- iii) glaciers

- iv) steam

Answer: iv) steam

Explanation: Steam is the gaseous form of water.

17. The symbol of the standard unit of measuring mass is:

- i) mg

- ii) g

- iii) kg

- iv) Kg

Answer: iii) kg

Explanation: Kilogram (kg) is the standard unit for measuring mass.

### Page 4

18. Select the answer which includes materials that show the property of elasticity:

- i) rubber and elastic

- ii) rubber and plastic

- iii) clay and iron

- iv) rubber and glass

Answer: i) rubber and elastic

Explanation: Rubber and elastic materials can stretch and return to their original shape.

19. Which of the following is a source of energy:

- i) flowing water

- ii) magnets

- iii) kinetic energy

- iv) sound

Answer: i) flowing water

Explanation: Flowing water can be harnessed for energy, such as in hydroelectric power.

20. Select the incorrect statement:

- i) The amount of salt that is dissolved in water is known as salinity

- ii) Mass of water is high with salinity

- iii) Water is categorized as freshwater, marine water, and brackish water based on salinity

- iv) The amount of salt dissolved in freshwater is very high

Answer: iv) The amount of salt dissolved in freshwater is very high

Explanation: Freshwater has low salinity compared to marine and brackish water.