Advertisements
Advertisements
Question
Complete the statement given below by filling in the blank with the correct word from the words given below
The ______ is a layer which extends up to about 10-50 km. above the earth.
Options
atmosphere
troposphere
stratosphere
Advertisements
Solution
The stratosphere is a layer which extends upto about 10-50 kms. above the earth.
RELATED QUESTIONS
Describe a simple experiment to show that l/5th of air is oxygen.
Statement given below is incorrect. Write the correct statement :
Symbiotic bacteria are present in nodules of cereal plants such as wheat.
What happens when Carbon burns in oxygen ? Also give the balanced chemical equation for the reaction.
Write ‘True’ or ‘False’ in front of following statement.
The catalyst used in laboratory preparation of oxygen gas from hydrogen peroxide gas is magnesium oxide
State the utility of oxygen for respiration in living organisms
The diagrams below represents an experiment to show the presence of a component of air.

- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
What is the presence of harmful substance in the air called?
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
Garima observed that when she left her tightly capped bottle full of water in the open sunlight, tiny bubbles were formed all around inside the bottle. Help Garima to know why it so happened?
