G. SHORT ANSWER TYPE QUESTIONS: (6×2=12m)
1. How are biodegradable wastes different from non-biodegradable wastes?
2. What is the composition of air?
3. How do drought and floods affect aquatic life?
4. What are the three necessary conditions to form a shadow?
5. What do you mean by poles of magnets?
6. What is circular motion? Give examples.
Answers
Explanation:
1.Biodegradable material contains food waste like vegetable and fruit peels, dead plants and animals, egg shells, chicken, garden waste paper materials, etc. Non-biodegradable things include of plastics, polystyrene, plastic, metals, and aluminum cans, toxic chemicals, paints, tyres, etc
2.It's a mixture of different gases. The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
3.The water flows over the terrestrial land and affects the life. The drought will dry up the water body this will expose the aquatic animals to terrestrial animals and may kill them due to dryness. The flood also expose the aquatic animals to the terrestrial region which may be killed due to human intervention.
4.The following three things are required for a shadow to form:
a source of light.
an opaque object.
a screen or surface behind the object
5.Magnetic pole, region at each end of a magnet where the external magnetic field is strongest. A bar magnet suspended in Earth's magnetic field orients itself in a north–south direction. The north-seeking pole of such a magnet, or any similar pole, is called a north magnetic pole.
6. Examples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a ceiling fan's blades rotating around a hub, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, ...
1.Biodegradable material contains food waste like vegetable and fruit peels, dead plants and animals, egg shells, chicken, garden waste paper materials, etc.
Non-biodegradable things include of plastics, polystyrene, plastic, metals, and aluminum cans, toxic chemicals, paints, tyres, etc.
2.The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.
3.The water flows over the terrestrial land and affects the life. The drought will dry up the water body this will expose the aquatic animals to terrestrial animals and may kill them due to dryness. The flood also expose the aquatic animals to the terrestrial region which may be killed due to human intervention
4. a source of light.
an opaque object.
a screen or surface behind the object.
5.