Science, asked by saritakhade157, 14 days ago

Q5.A). Answer the following 1. What are two types of disaster. Give their examples. 2. Write the adaptation in aquatic plant. Q5.B). Write short note on "Thermos flask.'​

Answers

Answered by Anvi02407
0

Answer:

1. What are two types of disaster. (Give their examples)

ans : Natural and man-made are the two types of disaster. Natural disasters are drought, flood, volcanic eruption, earthquake etc on the other hand man-made disasters are nuclear blast, chemical explosions, groundwater contamination etc.

2. Write the adaptation in aquatic plant.

a) Aquatic plants have their roots fixed in soil

b) Unlike land plants, their roots are small.

c) The stems of aquatic plants are long, hollow, and light.

d) Supported by their buoyancy in water and do not need a rigid stem

e) the presence of lightweight internal packing cells, aerenchyma

3. Write short note on "Thermos flask.'​

ans : A thermos flask is used to keep a hot liquid hot and a cold liquid cold for a long time. The thermos flask was invented by Sir James Dewar in 1892. Hence, it is also known as Dewar's flask or a vacuum flask. A thermos flask prevents the loss or gain of heat energy due to conduction, convection and radiation. It consists of a glass vessel with double walls. The glass vessel is enclosed by a metal or plastic cover for protection against damage.

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