Question

Q.1)Answer in one line.
1) Name four different forms of energy.
2)Why should drinking water be purified?
3) Why does the moon shine?
4) What are greenhouse gases?
5) Name three active volcanoes.
Q.2) Answer the following in short (any5)
(15)
1) What are earthquakes?
2)What is global warming?
3)The brain needs a continuous supply of blood and
oxygen. Why?
4)How is air useful to us?
5)Name the different types of forces.
6) What is drought?Name the conditions that can cause a
drought.
Q.3)Answer the following in long (any 3)
(15)
1)Name the different parts of the brain.What work does each
part do?
2)What do you mean by pollution? How can we prevent pollution
of air and water?
3) How is a solar eclipse caused. Explain with diagram.
4) What is Distilled water? What are it's uses?
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Answer 1

ANSWER

4) Distilled water is water that has been boiled into vapor and condensed back into liquid in a separate container. Impurities in the original water that do not boil below or near the boiling point of water remain in the original container. Therefore, distilled water is one type of purified water. 

Common uses for distilled water

Common uses for distilled watersteam irons. aquariums (mineral supplements should be added to the fish food) watering plants. car cooling systems.

Answer 2

Answer:

Q1.

1. Kinetic energy

potential energy

electrical energy

mechanical energy

2. Drinking water should be free from impurities as drinking contiminated water can lead to health related issues