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(i) Wild buffalo is an endangered species because |
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(ii) The thread-like structures present in the nucleus are: |
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(iii) After fertilisation, the resulting cell which gives rise to a new individual is the: |
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(iv) Structure present in the cell which is responsible for determination of the sex of a baby is: |
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(v) Adrenaline is produced by the: |
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(vi) An object is vibrating at 50 Hertz. What is its time period? |
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(vii) Which one of the following solutions will not conduct electricity? |
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(viii) Major earthquakes are likely to occur in: |
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(ix) Which of the following is NOT a member of the solar system? |
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(x) Sun appears to move from east to west around the earth. This means that earth rotates from: |
Hydrochloric acid is taken in a test tube and a piece of zinc metal is put into it. The collected gas evolved in the test tube is tested by bringing it near the burning matchstick. |
(a) Which is the gas evolved in the test tube after the reaction? |
(b) What happened to the burning matchstick when it is brought near to the mouth of the test tube. |
Fig. shows a man with a parachute. Name the force which is responsible for his downward motion. |
Will he come down with the same speed without the parachute? |
Column A | Column B | ||
(a) | Protozoa | (1) | Nitrogen fixation |
(b) | Rhizobium | (2) | Root nodules |
(c) | Legume | (3) | Paramecium |
(4) | Curd formation |
Categorize the following materials into 'can be recycled' and 'cannot be recycled' : |
Telephone instruments, toys, cooker handles, carry bags, ball point pens, plastic bowls, electric wire covering, plastic chairs and electrical switches. |
Observe the following figures. | |
(a) | (b) |
(c) | (d) |
(i) Identify the stages (a) to (d) in figures during development of human baby. | |
(ii) Arrange the stages in correct sequence of development. | |
(iii) Explain the development that takes place in any one stage. |
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