MEDIUM
10th CBSE
IMPORTANT
Earn 100

What is ten percent law? Explain with an example.

Important Questions on Our Environment

MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 17
Write the full form of CFC. Give one of its harmful effects.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 18
Explain how, harmful ultraviolet radiations of sunlight are prevented from reaching the earth's surface.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 19
What are the causes of depletion of ozone layer? Which diseases are likely to be caused if the ozone layer will become thinner?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 20
Explain how harmful chemicals enter our bodies.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 21
'If we excessively use pesticides to protect the crops from diseases, then it may cause long-term damage to mankind'. Justify this statement.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 22
What is meant by biological magnification? With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 23
What is meant by the bioconcentration of pesticides? Which common pesticide has accumulated in the human body in considerable amounts?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Short Answer Type Questions>Q 24
What is garbage? What does garbage consist of?