Soil — Science STD 7 — Question

Name the secretions of stomach, that help to digest food.

Mention the year which is celebrated as international year of freshwater?

What happens when light falls on a polished or shiny surface?

How fuses are useful?

Mark the following statements as True or False. If false, write the correct statements. All heterotrophs have a similar basic process of nutrition.

Suggest two methods to prevent rusting.

Why are organic matters added to the soil?

I once watched a part of marathon on a straight road stretch. I noticed that some people seemed to be running at the same speed during that distance while some people would speed up or slow down. How were their motion different?

Name the goats which are found in Tibet and Ladakh.

What is the motion of our hands while running?