MEDIUM
8th CBSE
IMPORTANT
Earn 100

Make a flowchart depicting the endocrine system.

Important Questions on Test Yourself

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q E

Give a reason for the following:

Granaries are always kept clean and dry.

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q E
Hydrogen is not used as a domestic fuel, why?
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q E
Bells are made of metals but not wood. Explain about the statement.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q E

Give reasons for the following:

Curd turns sour faster in summer than in winter.

MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q E
Fossil fuels cannot be made in a laboratory.
HARD
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q F

If the following substances are mixed, will it be a displacement reaction? Give reasons for your answer. Also, write the reactions.

 Iron sulphate and Copper.

HARD
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q F
If the following substances are mixed, will it be a displacement reaction? Give reasons for your answer. Also, write the reactions.
Iron sulphate and Zinc.
MEDIUM
8th CBSE
IMPORTANT
Expanded Universal Science>Chapter 19 - Test Yourself>Test Yourself>Q F
Explain the nitrogen cycle with the help of a diagram. Also, explain nitrification and denitrification.