Question

Naudu units lor measement Why?
to-day lile
4. What is a solar cell? Mention its application
5. Name the animals that give us milk. Name any four food products that can be made from
milk.
6. The solubility of a solute in a solvent can be increased low?
7. Write any three safety precautions to be taken while dealing with electricity
III. Answer the following HOTS:
2136
1. We know that the Earth is moving around the Sun When we look at the sky we see that the
Sun rises in the east, slowly moves towards the west and sets there Why?
2.
How do scavengers help in cleaning the environment?
SECTION -
IV. Answer the following questions:
314
1. Differentiate between evaporation and condensation​

Answer 1

What is a solar cell? Mention its application

➡Solar cells produce direct current electricity from the sun's rays, which can be used to power equipment or to recharge batteries. Many pocket calculators incorporate a single solar cell, but for larger applications, cells are generally grouped together to form PV modules that are in turn arranged in solar arrays.

Name the animals that give us milk. Name any four food products that can be made from milk.

➡World milk production is almost entirely derived from cattle, buffaloes, goats, sheep and camels. Other less common milk animals are yaks, horses, reindeers and donkeys

The solubility of a solute in a solvent can be increased low?

➡Temperature can also increase the amount of solute that can be dissolved in a solvent. Generally speaking, as the temperature is increased, more solute particles will be dissolved. ... For all gases, as the temperature increases, the solubility decreases. The kinetic molecular theory can be used to explain this phenomenon.

Write any three safety precautions to be taken while dealing with electricity.

➡Electrical safety tips for kids

1. Never put fingers or other objects in an outlet.
2. Keep metal objects out of toasters.
3. Never use anything with a cord or plug around water.
4. Never pull a plug out by its cord.
5. Stay away from substations and power lines.
6. Don't climb on power poles.
7. Never fly kites near power lines

We know that the Earth is moving around the Sun When we look at the sky we see that the Sun rises in the east, slowly moves towards the west and sets there Why?

➡The Sun, the Moon, the planets, and the stars all rise in the east and set in the west. And that's because Earth spins -- toward the east.

For a moment, let us ignore Earth's orbit around the Sun (as well as the Sun's and solar system's revolution around the center of the Galaxy, and even the Galaxy's journey through the universe). For the moment, let us just think about one motion - - Earth's spin (or rotation) on its axis.

How do scavengers help in cleaning the environment?

➡Scavengers play an important role the food web. They keep an ecosystem free of the bodies of dead animals, or carrion. Scavengers break down this organic material and recycle it into the ecosystem as nutrients. ... They use these keen senses to locate rotting carrion while they are soaring high over land.

Differentiate between evaporation and condensation.

➡Answer in image attached....

Answer 2

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