The Amazing World of Solutes, Solvents, and Solutions — Science STD 8 — Question

Why are metals considered elements?

What is the simplest form of matter?

Name the disease caused by the insufficient production of insulin hormone by pancreas.

Write the purest form of carbon.

Give examples to show that friction depends on the nature of two surfaces in contact.

Fill in the blanks in the following: Night birds have _________ cones than rods in their eyes.

Select the correct word from the following list and fill in the blanks. float, water, crop, nutrients, preparation The first step before growing crops is _________ of the soil.

Explain with four examples that sometimes, force of friction is desirable.

What kind of mixture is air?

Name one ‘single cell’ which behaves like a complete organism.