P-1 Lenses — Science STD 10 — Question

A potted plant having straight parts A and B was placed horizontally on its side as shown in figure (i). After a few days it was observed that the parts A and B of the plant acquire new positions as shown in Figure (ii).

1. Name the phenomenon exhibited by the position of plant parts A and B in Figure (ii).
2. Name the stimulus (other than sunlight) which causes plant part A to grow and bend upwards, and plant part B to bend downwards.

Distinguish between butterfly and bat with the help of four distinguish properties.

Complete the following table:

Type of Satellite		The names of Indian Satellite and launcher
1.	Navigational Satellite	Satellite : ___________ Launcher: __________
2.	Earth observation Satellite	Satellite : __________ Launcher: _________

Write some of the important uses of electromagnets.

Explain concept with example/explain with the help of a balanced equation.
Ores

Old vehicles fit to be thrown away.

What is meant by the heating effect of current? Give two applications of the heating effect of current.

Aluminium foils are used to wrap food items.

Give one example of an oxidation-reduction reaction which is also:

1. A combination reaction.
2. A displacement reaction.

What will happen if another similar glass prism is placed upside down behind the first prism?