Page 105 - Viva ICSE Science 5 : E-book
P. 105
EXERCISES
A. Fill in the blanks.
1. ____________ is the main source of energy.
2. A stone kept on top of a building has ____________ energy but if it falls the
potential energy is converted into ____________ energy.
3. ____________ is moving air.
4. Hydro energy and wind energy are used for producing ____________.
5. The vast amount of energy obtained from the sun is called ____________.
B. Write (T) for true and (F) for false statements.
1. Work is done while hitting a ball with a bat.
2. Work is not done while reading a book.
3. The energy possessed by a body due to its motion is called
potential energy.
4. Sun, wind and coal are renewable sources of energy.
5. Water is non-renewable.
C. Tick () the correct answer.
1. In which of the following cases work done is zero?
(a) Singing (b) Moving a cart
(c) Kicking a football (d) Both (a) and (c)
2. In which of the following cases the work is said to be done?
(a) Swimming
(b) Lifting a basket and putting it back on its position
(c) Reading a book
(d) Both (a) and (b)
3. Which of the following is a renewable source of energy?
(a) Petrol (b) Water
(c) Coal (d) None of the above
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