GROUP 1
Which of the following is NOT matter?
a) Air
b) Water
c) Thought
d) Chair
Answer: c
When sugar dissolves in water, it:
a) Vanishes
b) Settles down
c) Mixes completely
d) Floats
Answer: c
Which shows particles are very small?
a) Cutting wood
b) Dissolving salt
c) Boiling water
d) Freezing
Answer: b
The particles of matter are:
a) Very big
b) Very small
c) Visible always
d) Square in shape
b) Very small
Smell of perfume spreading shows:
a) No movement
b) Movement of particles
c) Solid formation
d) Cooling
b) Movement of particles
Why does salt disappear in water?
a) It evaporates
b) It melts
c) It occupies spaces between water particles
d) It reacts chemically
c) It occupies spaces between water particles
A student lights an incense stick in one corner of the room. After some time, students sitting far away can smell it. This shows:
a) Air is heavy
b) Particles are at rest
c) Particles move and mix
d) Smell travels by light
c) Particles move and mix
The smell of incense stick spreads because:
a) Heat increases
b) Particles move continuously
c) Gravity acts
d) Light spreads
b) Particles move continuously
A student adds a drop of ink into water and leaves it undisturbed. After some time, the color spreads evenly. This shows:
a) Particles are large
b) Particles move on their own
c) Water evaporates
d) Ink is heavier
b) Particles move on their own
If we keep dissolving a substance again and again in water, but still observe its effect, it indicates:
a) Particles are big
b) Particles are very small
c) Water changes color permanently
d) Reaction occurs
b) Particles are very small
Which condition will increase the motion of particle the most?
a) Lower temperature
b) Higher temperature
c) No movement
d) Closed container
b) Higher temperature
Why does smell of hot food spread faster than cold food?
a) More smell particles
b) Increased kinetic energy of particles
c) Less air resistance
d) Food evaporates
b) Increased kinetic energy of particles
If particles of matter had no space between them, what would NOT be possible?
a) Heating
b) Diffusion
c) Dissolving substances
d) Cooling
c) Dissolving substances
Which experiment best proves that particles intermix on their own?
a) Breaking chalk
b) Mixing ink in water
c) Cutting paper
d) Freezing water
b) Mixing ink in water
Which observation proves that particles are always in motion even without external force?
a) Stone breaking
b) Smell spreading in room
c) Writing on paper
d) Heating iron
b) Smell spreading in room