Structure of the Atom — Science STD 9 — Question

Give the scientific name of the following:

1. Roundworm.
2. Filarial worm.

State whether the following objects possess kinetic energy, potential energy, or both:

1. A man climbing a hill.
2. A flying aeroplane.
3. A bird running on the ground.
4. A ceiling fan in the off position.
5. A stretched spring lying on the ground.

What is the function of ciliated epithelium?

1. Sodium ion, Na⁺
2. Oxide ion, O^2-

What is the reason of increasing concentration of carbon dioxide in the atmosphere?

What happens to the work done when the displacement of a body is at right angles to the direction of force acting on it? Explain your answer.

Distinguish between algae and fungi.