EASY
7th CBSE
IMPORTANT
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Why are forests called the green lungs?
 

Important Questions on Yearly Examination Test Paper-1

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
List two similarities between respiration and combustion.
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
Give reasons:
We breathe faster when we need extra energy.
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C

Give reasons

During inhalation, ribs move up and outwards and diaphragm moves down

MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C

Give reasons

Yeast is an anaerobe.

EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
When crushed boiled rice is put in a test tube and a few drops of iodine solution are added to it, a blue- black colour shows the presence of A in rice. If however boiled rice is chewed thoroughly and then the same test performed, blue black colour does not appear. This shows that saliva converts A into B that doesn't change colour with iodine solution. (a) Identify A and B. (b) Discuss the role of saliva in digestion of food
 
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
When crushed boiled rice is put in a test tube and a few drops of iodine solution are added to it, a blue- black colour shows the presence of A in rice. If however boiled rice is chewed thoroughly and then the same test performed, blue black colour does not appear. This shows that saliva converts A into B that doesn't change colour with iodine solution. (a) Identify A and B. (b) Discuss the role of saliva in digestion of food
 
MEDIUM
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C
Draw and label the human excretory system
 
EASY
7th CBSE
IMPORTANT
Exam Guru Science>Chapter 23 - Yearly Examination Test Paper-1>Yearly Examination Test Paper-1>Q C

What is seed dispersal? How is it beneficial for plants?