Salt can be separated from its solution (salt dissolved in water) because

1

(a)

mixing of salt in water is a change that can be reversed by heating and melting of salt

(b)

mixing of salt in water is a change that cannot be reversed

(c)

mixing of salt-in water is a permanent change

(d)

mixing of salt in water is a change that can be reversed by evaporation

Which of the following are characteristics of living beings?
(i) Respiration
(ii) Reproduction
(iii) Adaptation
(iv) Excretion
Choose the correct answer from the options below.

1

(a)

(i), (ii) and (iv)

(b)

(i) and (ii)

(c)

(ii) and (iv)

(d)

(i), (ii) (iii) and (iv)

Bouncing back of ray of light from shining surface on which it was incident is known as

1

(a)

refraction

(b)

bending

(c)

reflection

(d)

dispersion

Flood means:

1

(a)

Excess of water

(b)

Scarcity of water

(c)

Food and milk

(d)

Spilling of milk

Which of the following can be recycled?

1

(a)

Waste paper

(b)

Kitchen waste

(c)

Leather

(d)

Animal waste

Milk provides ____________ vitamin-D and _________ (mineral).

1

(a)

protein, calcium

Liquids that are soluble in one another are called ............. liquids.

1

(a)

miscible

The habitats of plants and animals that live in water are called____________ habitat.

1

(a)

aquatic

Invention of ______________ changed the mode of transport significantly.

1

(a)

wheel

A device that is used to break an electric circuit is called_____________

1

(a)

switch

Cotton yarn on burning gives an odour similar to that of a burning paper.

1

(a) False

(b) True

The boiling of rice is a physical change.

1

(a) True

(b) False

Arrangement of leaf on plant is called venation.

1

(a) False

(b) True

The image of a yellow rose is black in colour.

1

(a) False

(b) True

The north pole of a freely suspended magnet points towards the magnetic south pole of earth.

1

(a) False

(b) True

Who are non-vegetarians?

1

(a)

People who eat meat, egg, fish and other foods of animal origin are non-vegetarians.

Name two synthetic fibres.

1

(a)

Rayon and Nylon

Name two changes in yourself that you face every day.

1

(a)

(a) Daily hair growth.
(b) Daily nail growth

Cartilage provides the shape to our body and also lubrication in movement. Is it true?

1

(a)

Yes, it is true.

Why do we write in laterally inverted letters on ambulance?

1

(a)

So that we can see it right in rearview mirror.

Out of all identified parts, name the part of the plants that we eat generally.

2

(a)

Name two translucent objects.

2

(a)

Is a mango sapling a herb? Give reason to support your answer.

2

(a)

How much time does adaptation take to occur?

2

(a)

Write a short note on the water cycle

2

(a)

Give three common characteristics of materials.

3

(a)

If a plant has fibrous root, what type of venation do its leaves likely to have?

3

(a)

Give an example of a non-living thing which shows any two characteristics of living things.

3

(a)

An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought in ON position, the bulb does not glow. What could be the possible reasons for it? Mention any two of them.

3

(a)

Correct the definitions of certain terms given below by changing only one word.
(a) Compost Substances converted into manure for use in industries.
(b) Landfill Garbage buried under water in an area.
(c) Recycling Reuse of unused material in the same or another form.

3

(a)

Sugar, salt, mustard oil, sand, sawdust, honey, chalk powder, petals of flower, soil, copper sulphate crystals, glucose, wheat flour are some substances given to Paheli. She wants to know whether these substances are soluble in water or not. Help her in identifying soluble and insoluble substances in water.

5

(a)

One day, students were asked to perform an activity. They were told to identify the root system in some given plant samples by analysing the venation in leaves. Archana at the same time failed to do so. She got sad and asked her teacher to guide her after the test.
(a) How will you identify the root system by analysing the leaves?
(b) Distinguish two types of venation in leaves.
(c) What are the values shown by Archana?

5

(a)

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes,1he shadow was not obtained. Explain.

5

(a)

Describe the steps involved in the magnetising of an iron strip with the help of a magnet.

5

(a)

How can you say that air contains dust particles?

5

(a)