Diversity In Living Organisms — Science STD 9 — Question

Draw a plant cell and name seven important organelles found in it.

Name the process you would use to separate a mixture of two miscible liquids (like acetone and water).

How many chanbers are present in the heart of:

1. Fishes.
2. Frog?

What do we call those particles which have:
Less electrons than the normal atoms?

Name the laws involved in the following situation:
a body of mass 5kg can be accelerated more easily by a force than another body of mass 50kg under similar conditions.

What is the nature of the ocean waves in deep water?

Name four animals which provide us food.

State one instance where water undergoes a physical change and one in which it undergoes a chemical change.

Name the device or machines which convert:
Electrical energy into sound energy.

Which one of the following is a micronutrient for the crop plants?

1. Calcium.
2. Iron.
3. Magnesium.
4. Potassium.