1. Yeast breaks down glucose into and carbon dioxide.
2. The is the largest gland in the human body.
3. The stage in which caterpillar spins fine silk filament around it to form cocoon is _
_
4. Tearing of paper Change.
5. It is a current carrying coil of an insulated wire wrapped around a piece of iron. It is called a/an _
6. The outer coarse hair of sheep is known as __________
Q. II. Choose the correct answer. (7 x 1 = 7 marks)
7. Depositing a layer of zinc on iron is called
(a) Galvanization (b) Crystallization (c) Sublimation (d) Layering
8. Which of the following is not digested by humans?
(a) Protein (b) Fats (c) Glucose (d) Cellulose
9. Another name of B-horizon is
(a) Topsoil (b) Parent rock (c) Subsoil (d) Bedrock
10. Pranati has set up a circuit as shown below. Which of the following should she put in the blank
box marked X to make the bulb glow more brightly?
(a)Bulb (b) Cell (c) Key (d)Wire
11. Observe the given figure. What do you conclude from this?
(a) Reduced air pressure can lift objects. (b) High wind speed reduces air pressure.
(c) Air expands on heating. (d) Atmospheric pressure increases with a decrease in temperature.
12. Electric bell is based on ____________principle.
a) motion b) electromagnetism c) electric circuit d) magnetic device
13. The acid present in the stomach
a) kills the harmful bacteria that may enter along with the food.
b) protects the stomach lining from harmful substances.
c) digests starch into simple sugars.
d) makes the medium alkaline.
Q. III. Match the following. (6 x1 = 6 marks)
Column A Column B
14. Magnetic effect of current a. Wind carrying water
15. Farming & gardening b. Operculum
16. Monsoon c. Cutaneous
17. Earthworm d. Oersted
18. Fish e. Funnel shaped
19. Cyclone f. Loamy soil
Q. IV. State whether the given sentence is True or False. (6 x1 = 6 marks)
20. The solution in which no more solute can be dissolved is called super saturated solution
21. 17. Air moves from a region of lower air pressure to a region of higher air pressure.
22. The distance-time graph for non-uniform motion is a straight line.
23. During heavy exercise the breathing rate of a person slows down.
24. The largest chamber of a ruminant stomach is rumen.
25. Sandy soil has 60% clay and 10% sand.
Q. V. Name the following and Label the parts in the diagram given below. (5 x1 = 5 marks)
26.
SECTION B
Q.VI,Answer the following in one or two sentences ( 5x 2= 10 marks)
27. Physical change can be reversible as well as irreversible. Explain both conditions with one example
for each.
28. What is mean by percolation rate of a soil? How we can determine the percolation rate of a given
soil?
29. Arun made an electromagnet by winding 50 turns of wire over an iron screw. Raj also made an
electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attract
more pins? Give reason.
30. Give the names of three leguminous plants.
31. Where does exchange of gases take place in lungs?
Q VII. Answer the following questions in three or four sentences ( 5 x 3= 15 marks)
32. Differentiate physical change and Chemical changes with one help for each.
33. What is soil profile? Write the names various horizons of soil with the help of a neat labeled
diagram.
34. With the help of neat labelled diagrams, explain open and closed circuit.
35. Explain the formation of cyclone.
36. Briefly explain the process of digestion in Amoeba.
37. Distinguish aerobic respiration from anaerobic respiration.
Q. VIII. Answer in detail. (5 x 5 = 25 marks)
38. The decomposition of animal waste by anaerobic bacteria produces biogas (change A). The biogas is
then burnt fuel (change B). What are the similarities between two changes.
39. a) What is soil erosion?
b) Mention any two causes of soil erosion.
c) Suggest any four measures to prevent soil erosion.
40. Explain the formation of thunderstorm. List some precautions to be taken during a thunderstorm.
41. a) Explain uniform and non-uniform motion with an example.
b) How the time period of a pendulum be increased or decreased?
42. a) Explain the factors on which the heating effect of electric current depends?
b) Prove with the help of an activity that an electric current can deflect the needle of a magnetic compass
Biology,chemistry,physics
I will mark as brainleast