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Lesson Worksheet: Physical and Chemical Changes Science
In this worksheet, we will practice describing and identifying physical and chemical changes.
Amelia has matched some science words to their meaning.
Is she correct?
This photo shows iron that has been heated to a high temperature and has melted. Iron melting is an example of a physical change.
Fill in the blanks: During a physical change, the of a material changes, but not the .
- Aappearance, chemical structure
- Bchemical structure, appearance
Water can exist as ice, water, or water vapor.
Select the physical change that is happening at arrow 4.
Amelia has grouped 5 facts about chemical and physical changes:
Select the number of the fact that is in the wrong place.
Daniel added a few drops of acid to a spoonful of sodium bicarbonate. A new substance formed.
What type of change is this?
- AA chemical change
- BA physical change
Mason and Olivia add a sugar lump to a cup of tea. They stir the tea and then taste it. It tastes sweet.
They, then, grind up a sugar lump, add it to another cup of tea, and stir.
They talk about how the tea will taste.
Who is right?
Benjamin heats some salt solution to evaporate off the water and get back the salt.
Is this an example of a physical or a chemical change?
A class are investigating what happens when you mix together vinegar and bicarbonate of soda.
The photograph shows what happened when they tried.
The class placed a balloon over the mixture in the bottle and it inflated. This proves that a new substance was produced.
Which state of matter was produced?
- AA gas
- BA solid
- CA liquid
What evidence do the class have that the mixture reacted to produce a change of state?
- AThe bicarbonate of soda dissolved.
- BThe bicarbonate of soda melted.
- CThe balloon inflated.
Fill in the blank: A physical change is reversible because the chemical structure of the material altered.
- Bis not
Chocolate melting is an example of a physical change.
Which of these is also an example of a physical change?
- ABoiling an egg
- BFreezing orange juice
- CBurning wood
- DCooking a sausage