Light, Shadows and Reflections — Science STD 6 — Question

Why do we need abiotic factors?

Fill up the blank:
Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clear water was then poured off from the top. The process of separation used in this example is called ___________.

How will you separate pure water from a solution of salt in water?

Give one example each of the types of motion:
Linear

Fill in the blanks with appropriate words:
The process of settling of heavier particles is called ___________.

On what factors does our type of clothing depend?

How are bones of bird modified to move wings up and down?

How many millimetre (mm) a metre has?

What are the main reasons for separation of components of a mixture?

Mention one adaptation present in the following animals:
In dolphins and whales to breathe in air when they swim near the surface of water.