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WorksheetsChanges Around us - 3_2
Total questions: 51
Worksheet time: 26mins
Evaporation is the change of state from ___________ to __________
liquid to gas
solid to liquid
gas to liquid
Evaporation takes place at any temperature
True
False
During evaporation, water ___________
loses heat
gains heat
Sara heats a salt solution. What is the name of the process happening at X?
boiling
evaporation
freezing
Air contains water vapour
True
False
Water vapour is water in the solid state.
True
False
Ali pours water into a glass dish. He leaves the dish in a warm place for 8 days. After 8 days, there is less water in the dish. Why does the dish contain less water?
The water evaporated
The water froze
The water condensed
Evaporation happens
throughout the liquid
at the surface of a liquid
Evaporation
A gas changes into a liquid
A solid changes into a liquid
A liquid changes into a gas
A liquid changes into a solid
Drying clothes in sunlight is the example of ______
condensation
evaporation
evaporation is a_______ change
reversible
irreversible
How would you show that setting of curd is a chemical change? what is the 1 sentence
Setting of curd is a chemical change because
Once curd is formed it cannot be reversed back into milk.
Curd and milk have different properties.
How would you show that the setting of curd is a chemical change? what is the 2 sentence
Once curd is formed it cannot be reversed back into milk.
Curd and milk have different properties.
Setting of curd is a chemical change because
How would you show that the setting of curd is a chemical change? what is the 3 sentence
Curd and milk have different properties.
Once curd is formed it cannot be reversed back into milk.
Iron blade of tools has a ring in which the wooden handle is fixed. Why the ring is made slightly smaller in size than the wooden handle? What is the first statement of the audio clip?
Iron blade of tools has a ring in which the wooden handle is fixed.
The ring is made slightly smaller in size than wooden handle
because handle fits easily as it expands on heating and contracts on cooling.
Iron blade of tools has a ring in which the wooden handle is fixed. Why the ring is made slightly smaller in size than the wooden handle? What is the second statement of the audio clip?
Iron blade of tools has a ring in which the wooden handle is fixed.
The ring is made slightly smaller in size than wooden handle
because handle fits easily as it expands on heating and contracts on cooling.
Iron blade of tools has a ring in which the wooden handle is fixed. Why the ring is made slightly smaller in size than the wooden handle? What is the third statement of the audio clip?
Iron blade of tools has a ring in which the wooden handle is fixed.
The ring is made slightly smaller in size than wooden handle
because handle fits easily as it expands on heating and contracts on cooling.
Why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized?
What is the first statement of the audio clip?
When water is added to Plaster of Paris, it sets into a hard mass
thus it keeps the fractured bone on its place and prevents it from moving while it heals.
That’s why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized.
Why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized?
What is the second statement of the audio clip?
When water is added to Plaster of Paris, it sets into a hard mass
thus it keeps the fractured bone on its place and prevents it from moving while it heals.
That’s why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized.
Why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized?
What is the third statement of the audio clip?
When water is added to Plaster of Paris, it sets into a hard mass
thus it keeps the fractured bone on its place and prevents it from moving while it heals.
That’s why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized.
Cooking an egg is a..
Irreversible
Reversible
Changes
Melting chocolate is a....
Irreversible
Reversible
Changes
The change happening in the picture is...
Irreversible
Reversible
Changes
Irreversible changes cannot go backwards
True
False
Reversible changes can change back to its original form....
True
False
What change is happening within this picture?
Reversible
Irreversible
When orange juice is frozen to make popsicles, can the popsicles change back to orange juice?
Yes
No
Which of these is NOT an irreversible change?
Burning
Melting
Rusting
Why are these shapes are considered as 2-dimensional shape?
Because they have length and height
Because they have width and height
Because they have length and width
I am a 3-dimensional shape.
I have one curved side and one curved edge.
I have one vertex, but it also called as apex.
Who am i?
Why are these shapes considered as 3-dimensional shapes?
Because they have length, width, and height.
Because they have length, width, and weight.
Chemical changes...
Always form a new substance.
May change shape or size.
May absorb or release heat.
May change colour, produce odor, create sound, release gas or produce light.
Can often be undone.
Physical Changes...
Do not form a new substance.
May change shape or size.
May absorb or release heat.
May change state of matter.
Can often be undone.
Leaves in autumn undergo a chemical change.
TRUE
FALSE
Fireworks exploding in the sky undergo a physical change.
TRUE
FALSE
Choose the answers that respond to a physical change.
Burning wood.
Chopping wood.
Melting ice.
Rotten bananas.
Choose the answers that respond to a chemical change.
Fireworks.
Cutting fabric to make a dress.
Making a cake.
Chopping onions.
Mixing and dissolving are examples of reversible change.
TRUE
FALSE
Rusting is an irreversible change.
TRUE
FALSE
Tick the three main things you need to start a fire.
An extinguisher.
A fuel.
Oxygen.
Ignition.
The change happening in the picture is...
Irreversible
Reversible
Changes
Baking a cake is an example of:
a reversible change
an irreversible change
Choose the TWO reversible changes:
When a substance changes from a liquid to a gas, this is called...
Melting
Evaporation
Condensation
Freezing
