Answer:
1. Interstellar cloud is an accumulation of dust and gas in between stars .
2 . The outer planets are composed of low density gas .
3 . Meteorites is the most important source for determining the age of our Solar System .
Explanation:
1 . Interstellar cloud
It is formed by the accumulation of plasma , gas and dust in the galaxy .
An interstellar clouds are more sense than the interstellar medium .
The cloud are classified according the size , density and temperature of the cloud . The interstellar cloud is formed by dust and gas particles from a red giant .
2 . The composition of the outer planets are from , the low density gases.
3 . Meteorites -
A meteorites originates from the outer space , and is a solid piece of debris . it can pass through the surface of a moon or planet , and due to high pressure and chemical interactions , can make the meteorite burn , and hence is seen as a shooting star or falling star.
Answer:
Certain process that deals with atmospheric emission are given as under.
Explanation:
Atmospheric emission is the root cause of diffusion pollutant gases in the earth's environment. Mostly caused due to the contamination the air by aerosols.
Certain process used to deal with such type of atmospheric emissions. Like
1. Measuring the pollutant content of air.
2. Keeping a check on vehicular emissions.
3. Meeting the set targets or goals set up by the United nations.
4. Proper disposal of wastes and proper solid waste management.
5. Cleaning and purification of rivers on a daily basis.
6. reducing the use of fertilizers, pesticides and insecticides.
7. Controlling the impact of fossil fuels, and banning plastic burning.
8. Reducing global warming and climate change impacts.
Answer: D. changes direction
Explanation: A lens works by refraction: it bends light rays as they pass through it so they change direction.
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Gravels are the largest particles formed from the breakdown of rocks.
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