Question

1. Wind doesn't help in the movement of?
2. Why usually Mountaineers carry oxygen cylinders with them?
3. Explain the composition of air.
4. What are the factors that affect the evaporation at a faster rate.
5. Define following terms?
a. Wind b. Breeze c. Storm
6. Explain the types of breeze that take place during the day and night time.
7. List out the natural calamity that occurs
8. On what factors natural disasters may occur.
9. What are the properties of air?
10.What is the role of long chimney in factories?
11.What is the important of oxygen in our daily life?
12.What happens if the percentage of the oxygen becomes 70%?
Fill in blanks
a. The Oxygen helps in breaking down the digested food in the body to release the______ b. Initial drops of first rain bring a lot of_____________ along with them.
c). the method of separating two components of a mixtures based upon the wind is ______ d). Nitrogen of the air is used on a large scale to manufacture ________
e). _________ air is used in tyres of vehicles.
f). Air is present in atmosphere, water and _________

I.
1. 2. 3. 4. 5.
II.
Fill in the blanks
Frog has lungs and ______________ a respiratory organ.
Closing and opening of stomata is controlled by ________________
Saliva is secreted in the mouth by __________________
Amoeba digests its food in the _______________
A flower may have either male or female reproductive parts is called _____________ How the following animals do takes in their food?
BIOLOGY
Name of the animals
Mouth parts to catch prey
Hydra
Paramecium
Frog
Butterflies and house flies
III.
Define sexual reproduction? Define nutrition?
Give an example of saprophytes?
What type of venation is seen in maize leaf?
IV.
What are different components of food?
Write the importance of of forest?
Why plants required nutrition?
Name the cell organell responsible for photosynthesis? Write about hinge joint?
V.
Draw stomata
Draw structure of kidneys Draw the diagram of amoeba

Answer 1

Answer:

Mountaineers carry an oxygen cylinder along with them. It is because when they climb mountains, as altitude increases, the amount of oxygen level in the atmospheric air decreases as trees are not found at higher altitudes. As a result, mountaineers suffer from dizziness. It can also lead to hypoxia. Hypoxia is a condition wherein a region of the body is deprived of sufficient supply of oxygen at the tissue level. Hence, to avoid such issues arising due to insufficient oxygen, mountaineers carry oxygen cylinders.