The Ever-Evolving World of Science — Science STD 7 — Question

State some adaptation of animals living in tropical rain forest.

Classify the given motion:

Motion of your hands while running.

• straight line motion

• circular motion

• oscillatory motion

What property of materials do we test using batteries, lamps and wires?

Name two substances that do not change the colour of red or blue litmus paper.

What is ‘onsite sewage disposal system’?

Life would be impossible without plants. Explain, how?

Mention two adaptive features of penguin that help it in swimming.

Explain the process of breathing in fish.

Define the term breathing rate.

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.