Sound — Science STD 8 — Question

Name the first artificial satellite launched by India.

Fill in the following blanks with suitable words:
The two common methods of asexual reproduction in animals are ______________ and ______________.

Name two methods of irrigation with conserve water.

Which stage comes earlier in the development of a human baby from zygote: foetus or embryo?

Name the scientist who discovered the vaccine for smallpox.

Name the force which always opposes motion.

Name the outermost layer of an animal cell.

Why should we not put a pin or pencil in our ears?

What the three types of protected area which have been earmarked for the conservation of forest and wildlife.

Write one word for:
Variety of plants, animals and microorganisms found in an area.