Q.1. Write down the important of atmosphere. Q.2. Write down the uses of oxygen. Q.3. Define the terms- a-Filtration b-Evaporation Q.4. Write down two slogans on"SAVE WATER".
Answers
You must have come across the problem of air pollution in Beijing, Delhi and Mumbai, and all the havoc it is causing. There are daily articles in the newspapers about the deteriorating Air Quality Index and its disastrous health effects. But how does the air get this much polluted? Why are some areas affected more and others less? Let us take a look at this topic of Air Pollution.
Answer:
1.The atmosphere is an important part of what makes Earth livable. It blocks some of the Sun's dangerous rays from reaching Earth. It traps heat, making Earth a comfortable temperature. And the oxygen within our atmosphere is essential for life.
2.Oxygen is used by animals and plants in the respiration (breathing) process. Tanks of oxygen are used in medicine to treat people with breathing problems. They are also used as life support for astronauts and scuba divers. The majority of the oxygen used in industry is used in the manufacturing of steel.
3.a.)Filtration is a process used to separate solids from liquids or gases using a filter medium that allows the fluid to pass through but not the solid. The term "filtration" applies whether the filter is mechanical, biological, or physical. The fluid that passes through the filter is called the filtrate b.)Evaporation is the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. Evaporation is a fundamental part of the water cycle and is constantly occurring throughout nature.
4. a. "Don't let life slip down the drain."
b. "Don't flush our planet's most valuable resource."
Explanation:
mark this as BRAINLIEST