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TOPIC: Science

Science 8 years 3 months ago #1

  • Saw Nay
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1)Which of the following statements is/are not correct.[Use Elimination Method]

1)Things can only be seen when they give off their own light or when they reflect light into our eyes

2)Opaque materials do not allow light to pass through them,thus,they reflect all light.

3)A shadow is formed when light is completely or partially blocked by an object.

4)A star is a source of light
( )

2)which of the situation(s) cause water pollution?[Water Pollution]

A:Seeping of soil into rivers.

B:spilling of oil by oil tankers.

C:Discharging chemicals into the waters.

D:Factories discharging hot water into the seas.

1)A and c Only.

2)B and c only.

3)A,B and c only.

4)All of the above.
( )

3)Which of the following(s)conserve water?

A)Use a water hose to wash cars

B)Always use full flush after using toilet

C)Using water collected from washing vegetables too water plants

D)Using a mug when brushing teeth instead of letting water run down the tap

1)A and B

2)C and D

3)A,C and D

4)All of the above
( )

I Hope you find it useful although there is only 3 questions.i took alot of time and effort so please suscribe and fav this.
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Re: Revision 8 years 2 weeks ago #2

  • cybordino
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only Q3

Q3)2
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Re: Revision 7 years 7 months ago #3

  • Nabyl
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1)4
2)2
3)2
Its quite easy
:evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: :evil: b)
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Re: Revision 7 years 3 months ago #4

  • Fairose Farveen
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1)2
2)3
3)2
1. Depending on the object (let's use a banana) they reflect different light. Out of appearingly white light, there are colours. A banana appears yellow because it absorbs all other colours and reflects the yellow part of the light. This also means that is you put a plant in green light, it will die because it reflects green and needs the other lights for photosynthesis.
2.You waste water by using a hose instead of washing the car with a pail of water and a cloth.Using full flush after using toilet will waste more water than using half flush after using toilet.
3.Using a mug when brushing teeth would conserve more water than using running water.
Hope you find this useful! :)
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Re: Revision 7 years 3 months ago #5

  • Fairose Farveen
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sorry
1)2
2)4
3)2
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Science 7 years 1 month ago #6

  • Karthik shriraam
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I think the answer is 2 for all.
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