INDIAN SCHOOL AL WADI AL KABIR
CLASS VII
DEPARTMENT OF SCIENCE 2014-15
WS NO.-8
TOPIC: RESPIRATION IN ORGANISMS
DATE: 17-8-2014
NAME:
1. Name the following.
(onemark)
a) Tiny air sacs at the ends of bronchioles.
b) The number of times air is inhaled or exhaled in one minute.
c) A large flat muscle forming the floor of the chest cavity.
d) Small openings that help the exchange of gases in insects.
e) Opening that guards the trachea.
2. Give reason for the following (one mark)
a) Even when we inhale cold air during winter, the exhaled air is warmer and misty.
b) Farmers turn the soil and make it loose.
c) We get muscle cramps when we stop doing a heavy physical activity.
d) Respiration is a vital process.
.
3. Answer the following questions in about 15-20 words (two marks)
a) Why hair and mucous are present in our nasal cavity.
b) What are lenticels?
c) Differentiate Breathing and Cellular respiration.
d) How do plants respire?
4. Answer the following in about 30-40 words (three marks)
a) Write an activity to show that exhaled air is rich in carbon dioxide.
b) Observe the experiment and answer the following questions.
i.
ii.
iii.
What happens to lime water after some time ?
What does this experiment prove ?
Write down the chemical reaction involved in this process
1
HIGHER ORDER THINKING SKILL QUESTIONS.
1.Riya holds a dragonfly by the sides of its abdomen,hr mother says not hold it by its
sides.Why
2. A slouching body posture affects your respiration.Give reason.
VALUE BASED QUESTION:
Roopam went to his town Agra 200 Km away from Delhi with his father in a car.On the way
there was lot of traffic jam.While reaching his town Roopam felt nausea and headache.He
had inhaled lots of toxic polluted gases.Which system/part of his body gets affected ?What
steps could be taken to reduse air pollution.
WORKSHEET BASED ACTIVITY (10 marks)
1) Label the parts marked: (any eight)
i)
(1/4 x 8=2)
A _______________________
B______________________________
C________________________
D_____________________________
E________________________
F_____________________________
G_________________________
H____________________________
I_________________________
2
2) Observe the diagram given below and explain the mechanism of breathing in
Humans.
(2)
3) Composition of inhaled and exhaled air is not the same .Justify
(2)
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
4) Differentiate
Aerobic
and
Anaerobic
Respiration(any
two)
(2)
5) Identify
(2)
the
organs
(a)
used
for
breathing
(b)
(c)
Prepared by Ms. Suma S
3
in
the
following
(d)
organisms.
4