Tissues — Science STD 9 — Question

1. Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E.
2. Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as?
3. Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.
4. Name the most common substance belonging to state A.
5. Which state of matter makes the sum and other stars to glow.

A body is moving uniformly in a straight line with a velocity of 5m/s. Find graphically the distance covered by it in 5 seconds.

What is the contribution of Margulis and Schwartz?

Write down four main characters of Annelida.

Explain various effects of weeds on crop plants.

Give any two ways in which these tissues differ functionally from each other.