Methods of Separation in Everyday Life — Science STD 6 — Question

Observe the activities in your house for a day. Identify the activities that involve evaporation. How does understanding the process of evaporation help us in our daily activities?

How is common salt obtained from sea?

Charan says that a wooden log is non-living as it cannot move. Charu counters it by saying that it is living because it is made of wood obtained from trees. Give your arguments in favour or against the two statements given by Charan and Charu.

Differentiate between exoskeleton and endoskeleton.

Fill in the blanks to complete the life story of cotton fibre.
My parents, cotton plants were grown in _____________ soil and _____________ climate. The plants bore fruits called _____________ I, the cotton fibre was separated from seeds in the cotton bolls by the process of _____________ Other cotton fibres and myself were made into yarn by the process of _____________ The yarn was _____________ to give beautiful colours and then _____________ to get cotton fabric.

Explain the process of making yarn from fibre.

Explain the principle behind the Kelvin scale and its significance in scientific measurements.

What are the significant differences between traditional and modern culinary practices?