General Science Class: VII paper

Time: 2 hours 30 Mins     Total Marks: 100
Name: _____________                          Date: ___________
Subject: General Science                                                     Class: VII
Questions
1 2 3 4 5 6 7 8 Total Marks
Marks Obtained
Instruction:
 Attempt all Questions.
Overwritten/re-written answers will be considered wrong.
Objective Part
Time Allowed: 1 hr Total Marks: 60
Q.1. Write down the proper term/word against each statement. (12 x 1=12)
A change in size, shape or state of matter _____________________
Farmers use to increase crop production _____________________
A polymer that can be easily moulded _____________________
The process of breaking down of food _____________________
The process of getting air into and out of the lungs _____________________
The surface which absorbs and radiates heat better _____________________
The highness or lowness of a sound     ______________________
The unit of potential difference ______________________
Blood vessels which carry blood towards heart          ______________________
Transports food in a plant body           ______________________ 
Pores to exchange gases in plants _______________________
Transport water and minerals from roots to leaves ______________________


Q.2. Circle the letter of the best answer. (20 x 1=20)
i.  The place where digested food is absorbed:
 Small intestine      b)  large intestine c) stomach d)  mouth
ii.  What part of our body contracts and moves down when we inhale?
 bronchioles
alveoli
diaphragm
kidneys
iii. Air is moistened, filtered and warmed in the:
oesophagus       b)  nose  c) mouth    d) stomach
iv. The reverse process of peristalsis:
breathing      b)  burning    
c) vomiting     d)  blood circulation
v. Where does the exchange of food, oxygen and wastes occur in the human body?
in arteries
in veins
in capillaries
in lymph vessels
vi.  The speed of sound in air is:
greater than that of sound     b) 100 km / hour
c)   100 metres / hour        d) 330 meters / second
vii.  Objects that vibrate slowly have a pitch that is:
transverse waves      b) longitudinal waves
standing waves      d) radio waves
viii. The device to measure potential difference in a circuit is called:
ammeter      b) voltmeter
barometer      d) thermometer
ix. Which one is an insulator?
copper
glass
iron
aluminium
x. Star distances are usually measured in:
meters
kilometers
light-years
yards
xi.  Burning a match stick is an example of a:
 physical change
chemical change
change in pressure
change of colour
xii.  Which one is a physical change?
frying egg
breaking a wooden stick
burning of candle
toasting bread
xiii. An example of chemical change is:
boiling of water 
evaporation of water
c) burning of paper
d) melting of ice
xiv. The red colour of a rose turns brown. It is a:
physical change      b) chemical change
reversible change    d)  sudden change
xv. A chemical change results in a:
loss of matter b) solution
phase change d) different kinds of matter
xvi. Warm air rises because of:
light
convection
conduction
radiation
xvii. In a vacuum flask, the vacuum prevents the transfer of heat by:
conduction
convection
radiation
both a & b
xviii. Sound waves travel more quickly through:
solids 
gases
air
d) liquids
xix. Wind blows due to:
conduction of heat      b) convection of heat
radiation of heat     d)  emission of heat
xx. A chemical change results in a:
loss of matter
solution
phase change
different kind of matter
Q.3. Answer the following questions.                                                     (6 x 4=24)
i. What are alveoli?
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
ii. Briefly describe the mechanism of breathing.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
iii. Define chemical change.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
___________________________________________________________________________
iv. Describe the structure of human heart.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________


v. Compare fuses and circuit breakers.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
___________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
vi. Describe loudness & pitch of sound.
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
___________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Q.4. Complete the concept map given below. (1 x 4=4)
Travels as
m\s
hertz
metre
Characteristics/factors









Subjective Part
Instruction:
Attempt all the questions and follow the given instructions.
Use separate sheets for answers.
Time Allowed: 1 Hr 30 mins Total Marks: 40
Q.5.
(a) Explain reversible & irreversible changes with examples.           (6)
 (b) Write a brief note on change of vegetable oil into fat.           (4)
Q.6.
(a) Describe the three main types of galaxies.           (6)
 (b) Write a brief note on star distances.           (4)
Q.7.
(a) Describe the human respiratory system.           (6)
 (b) Write a brief note on constipation.           (4)
Q.8.
(a) Write a few everyday applications of conduction of heat.    (6)
(b) What is the advantage of gliding flight for a bird?     (4)









Answer key
Q.1. Write down the proper term/word against each statement.
A change in size, shape or state of matter physical change
Farmers use to increase crop production fertilizer
A polymer that can be easily moulded PVC 
The process of breaking down of food digestion
The process of getting air into and out of the lungs inhalation
The surface which absorbs and radiates heat better black / dull surface
The highness or lowness of a sound     pitch
The unit of potential difference volt
Blood vessels which carry blood towards heart          arteries
Transports food in a plant body           phloem tissues
Pores to exchange gases in plants stomata
Transport water and minerals from roots to leaves xylem tissues
Q.2. Circle the letter of the best answer.
Q# Right option Q# Right option
d a
c c
c c
d a
b a
d b
a d
b a
b b
c a



Q.3. Answer the following questions.                                                   
i. What are alveoli?
Open-ended
ii. Briefly describe the mechanism of breathing.
Open-ended
iii. Define chemical change.
Open-ended
iv. Describe the structure of human heart.
Open-ended
v. Compare fuses & circuit breakers.
Open-ended
vi. Describe loudness & pitch of sound.
Open-ended
Q.4. Complete the concept map given below.
Travels as
m\s
hertz
metre
Characteristics/factors



Q.5.
(a) Explain reversible & irreversible changes with examples.
Open-ended
 (b) Write a brief note on change of vegetable oil into fat.
Open-ended
Q.6.
(a) Describe the three main types of galaxies.          
Open-ended
 (b) Write a brief note on star distances.          
Open-ended
Q.7.
(a) Describe the human respiratory system.          
Open-ended
 (b) Write a brief note on constipation.          
Open-ended
Q.8.
(a) Write a few everyday applications of conduction of heat.
Open-ended
(b) What is the advantage of gliding flight for a bird?    
Open-ended