Explain in what way noise pollution is harmful to humans.

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.

Write short notes on the following:
(a) Cytoplasm
(b) Nucleus of a cell

A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

What is the difference between noise and music? Can music become noise sometimes?

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

Do all the stars in the sky move? Explain.

Explain how you can take care of your eyes.

What is metamorphosis? Give examples.

Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself?

Explain the differences between pure air and polluted air.

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