Question

CLASS - IV
OUR ENVIRONMENT
ite the answers to the questions given below :
1.
The tigers are on the brink of extinction. Why do you think that this is happenin
2.
What are the undesirable constituents of air?
3.
How would you separate sand and water from their mixture?
4.
What measures should we take to keep the teeth healthy?
5.
Write the name of your favourite season and two of its characteristics.​

Answer 1

Answer:

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Answer 2

Answer:

1. Tigers are threatened by many factors, including "poaching, habitat loss, poorly planned development and illegal trafficking," the WWF said in a statement. "And there are few regulations to keep those tigers from ending up on the black market." Demand for tiger parts in areas of Asia is a key factor, campaigners said.
2. There are five primary pollutants that together contribute about 90 percent of the global air pollution. These are carbon oxides (CO and CO2), nitrogen oxides, sulfur oxides, volatile organic compounds (mostly hydrocarbons) and suspended particulate matter (SPMs)
3. In a mixture of sand and water, the heavier sand particles settle down at the bottom and the water can be separated by decantation. Filtration can be used to separate components of a mixture of an insoluble solid and a liquid.
4. Take care of your teeth. Achieving healthy teeth takes a lifetime of care. ...

• Don't go to bed without brushing your teeth. ...
• Brush properly. ...
• Don't neglect your tongue. ...
• Use a fluoride toothpaste. ...

5. The winter season is my favourite because

it has a week full of festivities and we

get.our vacations at that time. Our school

closes for a vacation of two weeks for

Christmas and New Year. In the winter

season, people put on warm clothes and

woollens to save themselves from the

severe cold.

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