Class: VI

Date:

Science

Time: 3 hrs M. M: 90

General Instructions:

1. There are 36 questions in this paper.
2. Marks are indicated against each question.
3. Q25 to Q36 are based on practical skills.
4. All questions are compulsory.

1 Leaves of a plant have reticulate venations. What type of root would it have? 1

2 Define the pole of a magnet. 1

3 Which gas is filled in an electric bulb and why? 1

4 Why does the police man regulating traffic wear a mask? 2

5 What is a reflector in an electric torch? Mention its function. 2

6 Give two differences between a cell and a battery. 2

7 a)Identify the cause behind the following changes 3

(i).Making a lemonade (ii).Burning of an incense stick (iii). Making a dough

1. Explain with the help of an example that expansion and contraction are reversible processes.

8 Differentiate between exothermic and endothermic change. Identify the following as 3

endothermic or exothermic change and reversible or irreversible change.

1. Burning of coal
2. Melting of wax.

9 Give reason 3

1. Electric wires become loose in summer.
2. Burning of oil in a wick is a chemical change.
3. Transformation of water into steam is a reversible change.

10 a) Mention two important functions of a stem in a plant. 3

1. Explain two stem modifications with one example each.

11 3

Nedules (Contain Rhizobium)

1. Label the part A in the root of the plant in the given figure. Name the bacteria present in

the part A. What is the function of bacteria present in A.

1. Why does the rose plant not have tendrils?

Give reason for the following

1. Aquatic plants have short and small roots.

12 3

1. Frogs have webbed feet
2. Mountain trees are cone shaped.

13 3 What do you mean by habitat? What is the habitat of the polar bear? Give three adaptations in polar bears which help them to survive in their habitat. 14 <math>3(1+2)</math> 15 3

What is a magnetic compass? On which property of the magnet does it work? In which direction does the magnetic needle placed inside the compass point?

1. A society has been using underground water continuously for 5 years. As a result, no more

underground water could be pumped out from the same depth, so it had to be further dug up. Why do you think this situation occurred? How can this situation be avoided in future? 3 16 a) Study the magnets 'X 'and 'Y' given below

1. Explain the formation of clouds.

A В С Repulsion D X Y

1. If B is the north pole of the magnet X, where is the north pole of magnet Y.?
2. What will happen if A is brought near C?

3 17 Write an activity to show the presence of air in soil.

1. Give any two uses of magnets in our daily life.

3 18 Study the following figure and answer the questions that follow:

1. (ii)
2. Explain why the water is not getting filled inside the glass in fig (i).
3. What happened on tilting the glass slightly in fig (ii)
4. State any two properties of air.

19 5

1. Rohan wants to make his own magnet. With the help of diagram describe to him briefly, the method of making a magnet.

b)Give three ways by which the magnet may lose its magnetic strength. 20 5

1. What is an electric circuit?
2. Identify the following electrical components and draw a simple electric circuit using these components.

ii) iii) i)

1. Name and define the two types of combinations in electric circuits.