When the free ends of a tester are dipped into a solution, the magnetic needle shows deflection. Can you explain the reason?

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.

Give two examples of each.
(a) Kharif crop
(b) Rabi crop

Make a labelled diagram of a candle flame.

In which female reproductive organ does the embryo get embedded?

Alida runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be :

(a) Wet marble floor, dry marble floor, newspaper and towel.
(b) Newspaper, towel, dry marble floor, wet marble floor.
(c) Towel, newspaper, dry marble floor, wet marble floor.
(d) Wet marble floor, dry marble floor, towel, newspaper

Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room. Explain.

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

Describe the construction of a kaleidoscope.

Explain why some fibres are called synthetic.

Explain why chloroplasts are found only in plant cells?

How are babies produced through IVF technique? What are such babies called?