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WorksheetsReversible or irreversible
Total questions: 38
Worksheet time: 19mins
How would the material be different after it change?
Liquid into solid
Solid into liquid
Solid into gas
Butter is melting. Is it Reversible or Irreversible?
Reversible
Irreversible
If something the same as the image is heated up, the changes included ....
Reversible
Irreversible
Solid
The material can be changed back to the way it was before the change happened. We called this...
Evaporation
Melting
Reversible
Irreversible
Which are irreversible changes?
Ice cube is melting
Salt dissolves in the water
Iron is rusty
Chocolate is freezing
What changes have happened to camphor?
Solid into liquid
Solid into gas
Liquid into solid
Gas into slid
Which of the following are examples of a reversible change?
freezing of water
melting of ice
rusting
evaporation of water
condensation of water
What are the manifestations that a chemical change has happened?
bubbles are formed
change in colour
change in odour
change in temperature
Mixtures can be made of.......
a solid and a gas
a solid and a liquid
a liquid and a gas
What should you use to separate the mixture rice and flour?
What forms when the oxygen reacts with iron?
(a)
Which of the following is an example of an irreversible change?
A log of wood has been burned on the fire
A fruit smoothie has been frozen
A bar of chocolate has been left in the sunshine and has melted
Which of the following is a sign of an irreversible change taking place?
A change in colour
A sudden change in temperature
Vigorous bubbling
All of the above
Name how this (ice to water) has changed state
Melting
Burning
Freezing
All of the above
Name the process that has been used to change this state from solid chocolate to melted chocolate
Cooling
Freezing
Heating
Rusting
Dissolving salt in water is an example of
Reversible Change
Irreversible Change
True or false: Dissolving is a reversible change. The solid (solute) and liquid (solvent) can be separated.
TRUE
FALSE
Which of these are irreversible changes?
Salt dissolved in water.
Plaster of Paris dissolved in water.
Wood that has been burnt.
An egg that has been boiled.
Which of these changes are reversible?
Sand mixed in water.
Rice mixed in sand.
potato that has been baked.
An effervescent tablet (e.g. Alka-Seltzer®) dissolved in water.
Which description best describes what happens when a material is burnt?
The process is reversible.
The process is irreversible: the original material is destroyed to
produce new
The material being burnt disappears.
The material being burnt always turns completely into a
gas.
Lolly is freezing. Is it Reversible or Irreversible?
Reversible
Irreversible
Brown sugar is dissolving. Is it Reversible or Irreversible?
Reversible
Irreversible
A4 paper is burning. Is it Reversible or Irreversible?
Reversble
Irreversible
What is an irreversible change?
Something you can change back.
Something you cannot change back.
Which of these is NOT a reversible change?
Cooking an egg is a..
Irreversible
Reversible
Melting chocolate is a....
Irreversible
Reversible
burning wood is ........... change
Reversible
Irreversible
When orange juice is frozen to make popsicles, can the popsicles change back to orange juice?
Yes
No
i like ......
cutting paper is
Reversible change
irreversible change
Reversible change
irreversible change
irreversible change
reversible change
irreversible change
reversible change
reversible change
irreversible change
Burning of candle wax is a ________change
Reversible change
Irreversible change
Boiling of rice is a _______________ change
Reversible change
Irreversible change
