P-2 Animal Classification — Science STD 10 — Question

Complete the chart - Classification of living organisms

What are the advantages of hydroelectric power generation? 

Explain why, though both a plane mirror and a sheet of paper reflect light but we can see the image of our face in a plane mirror but not in a sheet of paper.

A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.

1. In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
2. Which organism will have the maximum amount of pesticides accumulated through the food chain? What is this process known as?
3. Write the food chain comprising all the organisms mentioned above.
4. Which other organism you could write in place of bird in the above food chain?

Match the columns in the following table and explain them:

Column 1	Column 2	Column 3
Farsightedness	Nearby object can be seen clearly	Bifocal lens
Presbyopia	Faraway object can be seen clearly	Concave lens
Nearsightedness	Problem of old age	Convex lens

What is colourblindness?

Renewable energy is, energy produced from sources that do not deplete or can be replenished within a human’s life time. The most common examples include wind, solar, geothermal, biorhass, and hydroelectric power. This is in contrast to non-renewable sources such as fossil fuels. Most renewable energy is derived directly or indirectly from the sun. Sunlight can be captured directly using solar technologies. The sun’s heat drives winds, whose energy is captured with turbines. Plants also rely on the sun to grow and their stored energy can be utilized for bioenergy. Not all renewable energy sources rely on the sun. For example, geothermal energy utilizes the Earth’s internal heat, tidal energy relies on the gravitational pull of the moon, and hydroelectric power relies on the flow of water.
Questions and Answers :
(1) What is renewable energy?
(2) Give the examples of renewable energy.
(3) Why will energy from fossil fuel be over soon?
(4) Name the renewable sources of energy which are not dependent on sun. What are they dependent upon?
(5) Which type of energy do we mostly use in India?

What will be the effect on yourself and surrounding, if any accident-like disaster occurs during the sports on playground or in school?