How is an embryo developed?

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.

What is menstruation? Explain.

What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to the incident ray?

State the laws of reflection.

Explain how you can locate the Pole Star with the help of Ursa Major.

Explain why plastic containers are favoured for storing food.

List conditions under which combustion can take place.

Give two difference between a zygote and a foetus.

Give two examples each of situations in which you push or pull to change the state of motion of objects.

What will happen if:
(a) we go on cutting trees.
(b) the habitat of an animal is disturbed.
(c) the top layer of soil is exposed.

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