Question

during breathing
Q-2: Attempt any five parts. All carry equalm arks.
[5x5=25]
a)
What is the difference between anaerobic and aerobic respiration
Give one example of each.
Is a rainbow an example ofs pectrum? Justify
b)
c)
What are gears? How do input& output wheels work?
d)
Give reasons for the following statements
i)
Why do we see the flash ofl ight earlier than thunder?
ii)
Why the pulse is clearer in wristt han in ankles?
iii)
Why muscle cells have more mitochondria than bone cells?
iv)
Why our breathing rate at rest is different than when we are
exercising?
v)
Why walking on pebbles with bare feet does not hurt as
muchw hen you enter the sea.
e)
Briefly mention the components ofb lood and their functions?
f)
How balanced forces enable an object to float? Give example.​

Answer 1

Answer:

a) Aerobic respiration is done with the usage of oxygen. No energy is gained or lost . ex :- respiration by human beings

Anerobic respiration is done without the usage of oxygen. lot of heat energy is lost.

ex :-' formation of co

b) a rainbow is an example of spectrum because it has a band of seven colours in it formed by the passing of white light through the prism

c) when buoyant force is equals to the density of the object floats above the surface of the container

when buoyant force is more than the density of the object the object float in the liquid

when buoyant force is less than the density of the object the object sink in the liquid