Primary 5 Science Tutorial 1.2

Name:_________________________ Date:_______________

Different Types Of Changes (1.2)

A. Write the number of the correct answer in the brackets.

1. Heating a dish of salt solution is a reversible change because ________. ()
(1)
(2)
(3)
(4)

the salt doesn't dissolve in water
the salt can be recovered
heating causes chemical change
water is evaporated
2. When sugar interact with heat, ________. ()
(1)
(2)
(3)
(4)

it turns brown then black.
the process is reversible
it becomes a sweet solution
brown sugar is formed
3. Which of the following statement is correct? ()
(1)
(2)
(3)
(4)

Weather changes are cyclical.
Weather and climatic changes are the same.
Climatic changes are unpredictable
Climatic changes are cyclical.
4. Muddy water can be made clear by filtration. Filtration is a process to ________. ()
(1)
(2)
(3)
(4)

remove germs and bacteria
remove suspended particles in the water
clean the water chemcially
change the colour of the water
5. Which of the following change takes the longest time? ()
(1)
(2)
(3)
(4)

A wriggler into a mosquito.
An egg hatching into a chick.
Boiling a kettle of water.
A puppy growing into a dog.
6. In which process is a new substance formed? ()
(1)
(2)
(3)
(4)

Melting of ice.
Burning a match stick.
Dissolving salt in water.
Using clay to make a pot.
7. In a physical change, ________ is formed and it is usually reversible. ()
(1)
(2)
(3)
(4)

new substance
new property
no new substance
new chemcial
8. Which of the following is an irreversible process? ()
(1)
(2)
(3)
(4)

Inflating a basketball.
Freezing water into ice.
Melting iron.
Toasting bread.
9. When blue litmus paper turned to red in an acidic solution, it is a ________ change. ()
(1)
(2)
(3)
(4)

physical
chemical
reversible
bio-chemical
10. Which statement about a solution is true? ()
(1)
(2)
(3)
(4)

It is opaque.
Filtration can separate the particles.
It is homogeneous.
The solvent is always water.
B. Write "T" for true and "F" for false.

1. Melting of solid wax is a change in state.

()
2. Aging of human being is a change in state.

()
3. When a new substance is formed, it is always an irreversible process.

()
4. Burining of petrol in a car engine is a reversible process to produce heat energy.

()
5. Digestion of food in the body is a change in substance.

()
6. Movement of a car on a road is a change of position.

()
7. The rust on an iron nail can dissolve in water.

()
8. Soot is formed when paper is burned.

()
9. Homogeneous means the properties are not the same throughout.

()
10. All kinds of changes are visible.

()
C. Fill in the blanks with the most suitable word.

1. A change in state of a substance is usually caused by a change in the ____________.

2. Inflating and deflating a ballon is an example of a change in ____________.

3. When living things undergo changes during growth. These changes are termed ____________ changes.

4. Changes from day to night are predictable and ____________ changes.

5. Egg -> maggot -> pupa -> imago. This is a ____________ ____________ of a housefly.

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1.	Heating a dish of salt solution is a reversible change because ________.		()
	(1) (2) (3) (4)	the salt doesn't dissolve in water the salt can be recovered heating causes chemical change water is evaporated
2.	When sugar interact with heat, ________.		()
	(1) (2) (3) (4)	it turns brown then black. the process is reversible it becomes a sweet solution brown sugar is formed
3.	Which of the following statement is correct?		()
	(1) (2) (3) (4)	Weather changes are cyclical. Weather and climatic changes are the same. Climatic changes are unpredictable Climatic changes are cyclical.
4.	Muddy water can be made clear by filtration. Filtration is a process to ________.		()
	(1) (2) (3) (4)	remove germs and bacteria remove suspended particles in the water clean the water chemcially change the colour of the water
5.	Which of the following change takes the longest time?		()
	(1) (2) (3) (4)	A wriggler into a mosquito. An egg hatching into a chick. Boiling a kettle of water. A puppy growing into a dog.
6.	In which process is a new substance formed?		()
	(1) (2) (3) (4)	Melting of ice. Burning a match stick. Dissolving salt in water. Using clay to make a pot.
7.	In a physical change, ________ is formed and it is usually reversible.		()
	(1) (2) (3) (4)	new substance new property no new substance new chemcial
8.	Which of the following is an irreversible process?		()
	(1) (2) (3) (4)	Inflating a basketball. Freezing water into ice. Melting iron. Toasting bread.
9.	When blue litmus paper turned to red in an acidic solution, it is a ________ change.		()
	(1) (2) (3) (4)	physical chemical reversible bio-chemical
10.	Which statement about a solution is true?		()
	(1) (2) (3) (4)	It is opaque. Filtration can separate the particles. It is homogeneous. The solvent is always water.


1.	Melting of solid wax is a change in state.	()
2.	Aging of human being is a change in state.	()
3.	When a new substance is formed, it is always an irreversible process.	()
4.	Burining of petrol in a car engine is a reversible process to produce heat energy.	()
5.	Digestion of food in the body is a change in substance.	()
6.	Movement of a car on a road is a change of position.	()
7.	The rust on an iron nail can dissolve in water.	()
8.	Soot is formed when paper is burned.	()
9.	Homogeneous means the properties are not the same throughout.	()
10.	All kinds of changes are visible.	()


1.	A change in state of a substance is usually caused by a change in the ____________.
2.	Inflating and deflating a ballon is an example of a change in ____________.
3.	When living things undergo changes during growth. These changes are termed ____________ changes.
4.	Changes from day to night are predictable and ____________ changes.
5.	Egg -> maggot -> pupa -> imago. This is a ____________ ____________ of a housefly.