What kind of change occurs in the eruption of a volcano

1

(a)

Physical change

(b)

Sudden change

(c)

Irreversible chang

(d)

All of these

The habitat of living organisms that live in water is called

1

(a)

Terrestrial habitat

(b)

Aquatic habitat

(c)

Both (a) and (b)

(d)

None of the above

Two students while sitting across a table looked down onto its top surface. They noticed that they could see their own and each other's image. The table top is likely to be made of

1

(a)

unpolished wood

(b)

red stone

(c)

glass sheet

(d)

wood top covered with cloth

Colour of water is

1

(a)

Sky blue

(b)

White

(c)

Green

(d)

Colourless

Which of the following activities does not reflect responsible behaviour with regard to waste disposal?

1

(a)

Goods carried in paper bags or cloth bags

(b)

Waste collected in polythene bags for disposal

(c)

Waste separated into those that degrade and those that do not

(d)

Making handicrafts with used up notebooks

The vitamin that gets easily destroyed by heating during cooking is __________.

1

(a)

vitamin C

Objects lighter than a liquid _____ in that liquid.

1

(a)

Saline water, hot air and sand are __________components of a habitat.

1

(a)

abiotic

In rectilinear motion, object moves _________________a______________ line.

1

(a)

in, straight

A device which makes or breaks the circuit is called _________________

1

(a)

switch

The fruits of cotton plant are as big as apple.

1

(a) True

(b) False

The boiling of rice is a physical change.

1

(a) True

(b) False

Bud is non bloomed flower.

1

(a) False

(b) True

Rubber is a translucent object.

1

(a) True

(b) False

A bar magnet has three poles. 

1

(a) True

(b) False

Are there any food materials that have sources other than plants and animals? Name them, if any.

1

(a)

Yes, salt and water are obtained from sources other than plants and animals.

Which country first invented silk?

1

(a)

China

A cement bag left open gets hard after some time, what type of change it is ?

1

(a)

Chemical change.

Why is our backbone not fixed?

1

(a)

Backbone is not fixed so that we can bend it.

What is reflection?

1

(a)

The bouncing off and change in direction of light on striking a plane mirror is called reflection

Why is food present in the roots of some plants, although it is made in the leaves?

2

(a)

Why a shopkeeper prefers to keep biscuits and sweets in a glass or plastic container?

2

(a)

It is given that a plant is very tall and have hard, thick stem with branching on the upper part of the plants. On the basis of the given characteristics, categorise the plant. 

2

(a)

Leaves of mountain trees prevent damage by snow or rain. How?

2

(a)

Write any two activities which require more than one bucket of water.

2

(a)

Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt

3

(a)

Can the stem of a plant be compared with a street with two ways traffic? Give reason.

3

(a)

What are the specific features present in a deer that help it to detect the presence of predators like lion?

3

(a)

Sita is operating an base electric wire so that its electric iron can be used safely. Her friend Vimlesh advised her not to do so without plastic gloves.
(a) Mention the values that Vimlesh shows here.
(b) A plastic glove is an insulator or conductor.

3

(a)

Recently, a ban on plastic bags has been imposed in many places. Is the ban justified? Give reasons in three sentences.

3

(a)

Chalk, iron nail, wood, aluminium, candle, cotton usually look different from each other. Give some properties by which we can prove that these materials are different.

5

(a)

Sarita was interested in knowing more about plants and its parts. She started exploring and collecting plants. She wanted to preserve them, so that she can have a good collection of plants.
(a) Suggest the steps to help her in identifying plants.
(b) Is there any other method to identify plants Explain.
(c) What are the values shown by Sarita?

5

(a)

Explain with the help of a diagram that how can we see an image behind wall using a periscope.

5

(a)

A bar magnet is cut into two pieces A and B from the middle as shown in figure.

Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.

5

(a)

Air present in atmosphere will be defined as what? Name the major constituents of air. Give their volume proportions in air.

5

(a)