Question

i) The bodily movement involving change of place in animals is called

(a) respiration

(b) reproduction

(c) locomotion

ii) What kind of motion is executed by a pendulum of a wall clock?

(a) Oscillatory motion

(b) Circular motion

(c) Rectilinear motion

iii) The slippery scales help the fish in

(a) breathing

(b) swimming

(c) eating

iv) A plane mirror forms a

(a) virtual image

(b) real image

(c) inverted image



Q.2. Fill in the blanks : ( 1x4=4)

i) Screen is a surface on which _________ are formed.

ii) The SI unit of length is ___________.

iii) When organisms live in water it is known as ___________ habitat.

iv) Those objects give out light of its own are known as ___________.



Q.3. State true/false: ( 0.5x4=2)

i) Rotational motion is also known as periodic motion.

ii) Opaque objects cast no shadow.

iii) The process of getting rid of waste is called excretion.

iv) Motion of second’s hand of a clock is rectilinear.



Q.4. Short answer type questions: (2x3=6)

(a) Frogs can live both on land and in water, name the adaptations seen in these animals.

(b) Why is silver glass used as a mirror?

(c) The distance between Radha’s home and her school is 3250m. Express this distance in km.

Q.5. Long answer type questions: (3x2=6)

(a) What are shadows? What do we need in order to see a shadow?.

(b) What type of motion do the following objects have?

i) motion of a swing, ii) rotation of fan iii) motion of wheel of a bicycle

iv) pendulum of a clock v) motion of stone falling vi) motion of car on road




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Answer 1

Answer:

your first question answer is

Explanation:

c.locomotion

Answer 2

1. Locomotion

Oscillatory motion

swimming

virtual

2. image

meter

aquatic

luminous

Explanation:

hope it helps