Complete the following word puzzle with the help of clues given below. 

Down
1. Providing water to the crops.
2. Keeping crop grains for a long time under proper conditions.
5. Certain plants of the same kind grown on a large scale.

Across
3. A machine used for cutting the matured crop.
4. A rabi crop that is also one of the pulses.
6. A process of separating the grain from chaff.

Describe with the help of a diagram an instrument which can be used to detect a charged body.

Sketch larynx and explain its function in your own words.

Arrange the following boxes in proper order to make a flow chart of sugarcane crop production.

Make a labelled diagram of a candle flame.

What is metamorphosis? Give examples.

The following Table shows the total power shortage in India from 1991– 1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.

Make sketches of animal and plant cells. State three differences between them.

What is a constellation? Name any two constellations.

Describe the construction of a kaleidoscope.

Complete the crossword with the help of clues given below:
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.

Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.

Why should paper be saved? Prepare a list of ways by which you can save paper.

Explain the importance of reproduction in organisms.

Make a sketch of the human nerve cell. What function do nerve cells perform?

The bulb does not glow in the setup shown in Fig.14.10. List the possible reasons. Explain your answer.

Draw sketches to show the relative positions of prominent stars in
(a) Ursa Major and (b) Orion

Differentiate between internal fertilization and external fertilization.

Can you store lemon pickle in an aluminium utensil? Explain.

Explain why the sliding friction is less than the static friction.

Give two examples of situations in which applied force causes a change in the shape of an object.

Give examples which indicate that nylon fibres are very strong.