PHYSICS CH6 Light — Science STD 9 — Question

What is crossing over?

What is rancidity?

Higher Order Thinking Skill.

There are 3 plants A, B and C. The flowers of A open their petals in bright light during the day but closes when it gets dark at night. On the other hand, the flowers of plant B open their petals at night but closes during the day when there is bright light. The leaves of plant C fold up and droop when touched with fingers or any other solid object.

1. Name the phenomenon shown by the flowers of plant A and B.
2. Name one plant each which behaves like the flowers of plant A and B. 
3. Name the phenomenon exhibited by the leaves of plant C. 
4. Name the plant which behaves like the leaves of plant 'C'?

Define latent heat of fusion?

Numerical problem.

A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located? (Ans: 21 cm in front of the mirror)

How tall does a mirror have to be to fit an entire person’s body?

What is Application software? How is it utilised?

State Faraday’s laws of electromagnetic induction.

What are the p-block elements?

Give an example for the movement of plant part which is very quick and can be observed easily.