Paheli had heard that rainwater is as go | Class 8 Science Chapter Chemical Effects of Electric Current, Chemical Effects of Electric Current NCERT Solutions

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.

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

What are sex hormones? Why are they named so? State their function.

List three states in India where earthquakes are more likely to strike.

Define asexual reproduction. Describe two methods of asexual reproduction in animals.

What is menstruation? Explain.

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

How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm?

Make a labelled diagram of a candle flame.

How is an embryo developed?

Explain how deforestation leads to reduced rainfall.