Fill in the blanks : 1) The angle of reflection is ………… to the angle of incidence. 2) The image formed by a plane mirror is ………….. inverted with respect to the object. 3) The …………….. uses two plane mirror strips each of which is kept inclined at 45° to the axis of the tube.

This planet, _______ is yellowish in colour and has many rings and satellites.

A. Uranus

B. Jupiter

C. Neptune

D. Saturn

Pasteurized milk does not need to be boiled. Why?

Write the $pH$ value of the

1. Saliva (before meal)

2. Saliva (after meal)

3. Lemon juice

4. Colourless aerated drink

5. Carrot juice

6. Coffee

7. Tomato juice

8. Tap water

What are natural things? Give an example?

Group of animals which gives wool are:

A. Sheep, goat, camel, yak

B. Sheep, camel, lion, rabbit

C. Rabbit, silkworm, buffalow, cow

D. Goat, cat, sheep, camel