CBSE Class 9 Science Worksheet
Unit 1-Matter - Its Nature & Behaviour - Matter in our surroundings
1.
Fill in the blanks: The fluorescent tubes and neon sign bulbs glow because of _________.
A)
high current
B)
high pressure
C)
high voltage
D)
presence of charged particles
2.
Why solids have definite shape
A)
Because they are rigid in nature
B)
Because of high molecular force of attraction between it's constituent particles
3.
What conditions is required for CNG preparation?
A)
Low temperature, low pressure
B)
High temperature, low pressure
C)
High temperature, High pressure
D)
Low temperature, high pressure
4.
Fill in the blanks: As the temperature increases __________ energy of the particles increases.
5.
On heating, diffusion becomes ____
6.
With every dillution of Potassium Permanganate with water the color becomes ______
A)
dark
B)
light
C)
bright
7.
Why the density of ice is lower than that of water?
8.
The SI unit of mass is _____
A)
cm
B)
milligram
C)
Kilogram
D)
mm
9.
State true or false: Gas has maximum space among the particles among the state of matter.
A)
true
B)
false
10.
Which of the following SI unit is not matched to the physical quantity?
A)
Pascal – Pressure
B)
Kelvin – Temperature
C)
Gram – Mass
D)
Cubic meters – Volume
11.
Which of the following is the only non metallic liquid element at room temperature?
A)
Chlorine
B)
Iodine
C)
Bromine
D)
Sodium
12.
Fill in the blanks: As the surface area of the body increases the rate of evaporation __________.
A)
increases
B)
decreases
C)
remains same
D)
none of these
13.
State true or false: Evaporation causes cooling.
A)
true
B)
false
14.
A small crystal of Potassium Permanganate can contain _________
A)
many of tiny particles
B)
few of large particles
C)
few of tiny particles
D)
millions of tiny particles
15.
Which property of CNG helps it to be remain in large volume in small cylinders?
A)
High density
B)
High compressibility
C)
High pressure
D)
High temperature
16.
Fill in the blanks: Melting point of ice is ________.
A)
273K
B)
0K
C)
373K
D)
100°C
17.
Particles of matter _____ each other
18.
Fill in the blanks: The zig-zag movement of the small particles suspended in a liquid or a gas is called________.
19.
Just a few crystals of Potassium Permanganate can _______ a large volume of water
A)
defuse
B)
heat
C)
color
D)
spread smell
20.
Why does a gas fill completely the vessel in which it is kept?
CBSE Class 9 Science Worksheet
Unit 1-Matter - Its Nature & Behaviour - Matter in our surroundings
Answers
1.
Option D
2.
Option B
3.
Option D
4.
kinetic
5.
Option B
6.
Option B
7.
When water changes into ice, space between particles increases. These spaces are larger as compared to the spaces present between the particles of water. Thus, the volume of ice becomes greater than that of water. Hence, the density of ice became lower than that of water.
8.
Option C
9.
Option A
10.
Option C
11.
Option D
12.
Option A
13.
Option A
14.
Option D
15.
Option B
16.
Option A
17.
Option B
18.
Brownian motion
19.
Option C
20.
because the molecules of the gas have very high kinetic energy due to which they keep moving in all directions.
