Different Types Of Changes
A.
(1.1)
Write the number of the correct answer in the brackets.
1.
When a substance changes its state, it is a ________
process.
(1) reversible
(2) useful
(3) irreversible
(4) chemical
(
)
2.
Which statement is false?
(1) Changes are caused by interactions
(2) Living things go through changes.
(3) All changes take same amount of time.
(4) Non-living things can undergo changes.
(
)
3.
Mixing sugar with a cup of hot tea is ________.
(1) a reversible physical process
(2) an irreversible physical process
(3) a reversible chemical process
(4) an irreversible chemical process
(
)
4.
Morning dew on the leaves of plants in the garden
comes from ________.
(1) plants through their stomata
(2) photosynthesis the day before
(3) water vapour in the atmosphere
(4) condensation of clouds
(
)
5.
When a ball is kicked, the moment the foot comes into
contact with the ball, there ________ of the ball.
(1) is no change
(2) is change in size
(3) is change in volume
(
)
(4) is change in size and volume
6.
A change in state takes place when ________.
(1) a balloon is inflated
(2) a piece of paper is burnt into ashes
(3) a chalk stick is pounded into powder
(4) a piece of wood is cut into smaller pieces
(
)
7.
When a cup of water is spilled onto the floor, there are
changes in ________.
(1) shape and volume
(2) weight, shape and volume
(3) colour and shape
(4) weight and shape
(
)
8.
Which of the following process is reversible?
(1) Frying an egg.
(2) Litmus paper changing colour.
(3) Heating sugar strongly.
(4) Dissolving salt in water.
(
)
9.
The growth of a caterpillar to a moth has ________
pattern.
(1) an unpredictable
(2) no definite
(3) an easy
(4) a definite
(
)
10.
Metal gates are painted to prevent rust from
developling because the paint ________.
(1) masks the rust
(2) has a chemical reaction with the metal
(3) shields the metal from oxygen
(4) replaces the metal
(
)
B.
Write "T" for true and "F" for false.
1.
Fire requires oxygen to continue burning.
(
)
2.
When water is boiling, the temperature of the water
increases.
(
)
3.
All changes are reversible.
(
)
4.
Aging of man is an irreversible process.
(
)
5.
Water can cause rusting because it contains oxygen.
(
)
6.
Climatic changes does not follow a definite pattern.
(
)
7.
All changes take time to happen. Some changes are
fast while others are slow.
(
)
8.
The particles in a solute can pass through a filter
paper.
(
)
9.
The rotation of the Earth is a physical change.
(
)
10.
In a brine solution, the salt is the solvent.
(
)
C.
Fill in the blanks with the most suitable word.
1.
Living organisms undergo changes during growth, these are termed
____________ changes.
2.
When steam condenses into water, ____________ is given off.
3.
Limewater turns chalky when it interacts with ____________.
4.
To move a stationary object, a ____________ has to be applied.
5.
A solution is homogeneous if its properties are the __________
throughout.