#### seventh standard science chapter 1 and 2 model question paper for new syllabus state board english medium

7th Standard EM

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Science

Use blue pen only
Time : 01:30:00 Hrs
Total Marks : 70

Part - A

Answer each of the following questions

2 x 1 = 2
1. Two spheres have equal mass and volume in the ratio 2:1. The ratio of their density is

(a)

1:2

(b)

2:1

(c)

4:1

(d)

1:4

2. A particle is moving in a circular path of radius r. The displacement after half a circle would be

(a)

Zero

(b)

R

(c)

2 r

(d)

r / 2

3. Part - B

Answer each of the following questions

3 x 1 = 3
4. Density of mercury is _______

()

13,600 kg/m3

5. One astronomical unit is equal to _________

()

1.496 x 1011m

6. In ___________ equilibrium its centre of gravity remains at the same height when it is displaced.

()

neutral

7. Part - C

Answer each of the following questions

2 x 1 = 2
8. The region covered by the boundary of the plane figure is called its volume

(a) True
(b) False
9. Water is denser than kerosene.

(a) True
(b) False
10. Part - D

Answer each of the following questions

5 x 1 = 5
11. Distance

12. (1)

Larger base area

13. Density

14. (2)

rope

15. Length

16. (3)

amount of a substance

17. Mass

18. (4)

light year

19. Stability

20. (5)

kg / m3

Part - E

Answer each of the following questions

1 x 1 = 1
21. Copper, Aluminium, Gold, Iron

22. Part - F

Answer each of the following questions

2 x 2 = 4
23. Water: kerosene :: ________ : Aluminium

24. velocity : metre/ second : : acceleration : ________

25. Part - G

Answer each of the following questions

1 x 2 = 2
26. Assertion: Iron ball sinks in water.
Reason: water is denser than iron.
a. If both assertion and reason are true and reason is the correct explanation of assertion.
b. If both assertion and reason are true, but reason is not the correct explanation of assertion.
c. Assertion is true but reason is false.
d. Assertion is false but reason is true.

27. Part - H

Answer each of the following questions

3 x 5 = 15
28. A circular disc has a radius 10 cm. Find the area of the disc in m2. (Use π = 3.14).

29. A sphere of radius 1cm is made from silver. If the mass of the sphere is 33g, find the density of silver. (Take π = 3.14)

30. A car started from rest and travelling with velocity of 20 m /s in 10 s. What is its acceleration?

31. Part - I

Answer each of the following questions

1 x 2 = 2

32. CLUES – ACROSS
1. SI unit of temperature
2. A derived quantity
3. Mass per unit volume
4. Maximum volume o liquid a container can hold
CLUES – DOWN
a. A derived quantity
b. SI unit of volume
c. A liquid denser than iron
d. A unit of length used to measure very long distances

33. Part - J

Answer each of the following questions

1 x 2 = 2
34.  S.No First Move Seconde Move Distance (m) Displacement 1. Move 4 meters east Move 2 meters west 6 2 m east 2. Move 4 meters north Move 2 meters south 3. Move 2 meters east Move 4 meters west 4. Move 5 meters east Move 5 meters west 5. Move 5 meters south Move 2 meters north 6. Move 10 meters west Move 3 meters east
()

35. Part - K

Answer each of the following questions

5 x 2 = 10
36. Give the formula to find the density of objects.

37. What is the area of 10 squares each of side of 1 m.

38. Find the area of the following regular shaped figures: (Take $\pi$ = 22/7)
(a) A rectangle whose length is 12 m and breadth is 4 m.
(b) A circle whose radius is 7 m.
(c) A triangle whose base is 6 m and height is 8 m.

39. Find the volume of (Take $\pi$ = 22/7)
i. a cube whose side is 3 cm.
ii. a cylinder whose radius is 3 m and height is 7 m.

40. Correct your friend who says “The acceleration gives the idea of how fast the position changes”.

41. Part - L

Answer each of the following questions

4 x 3 = 12
42. What are derived quantities?

43. A sphere is made from copper whose mass is 3000 kg. If the density of copper is 8900 kg/m3, find the volume of the sphere.

44. Distinguish between speed and velocity.

45. What do you mean by constant acceleration?

46. Part - M

Answer each of the following questions

2 x 5 = 10
47. How will you determine the density of a stone using a measuring jar?

48. Explain the types of stability with suitable examples.