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UNIT 5 MATTER
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Once the objects are no longer useful, they become _____ that we must get rid of.
waste
Give me an example of what you can do to recycle:
put the waste into different containers...
Give me an example of what you can do to reduce:
Use less plastic, use a big plastic bag when you go shopping,...
Decide if this is a physical change or a chemical change: A foggy mirror in the bathroom.
Physical change
Which three things can we obtain from combustion?
smoke, light and heat
Oxidation happens because there is ...
Oxygen
What are the three strategies that we can apply to help the environment?
Reduce, reuse, recycle
Which substance is homogenous and which is heterogenous?
1. Heterogenous 2. Homogenous
Name these two processes:
solidification and melting
Name these two processes:
condensation and evaporation
Name these two processes:
sublimation and reverse sublimation
Name 3 products that can be obtained from plastic:
computer parts, bottles, boots...
Name 3 products that can be obtained from wood:
paper, decoration, floors, furniture...
Name 3 products that can be obtained from cotton:
clothes, towels, toys...
Name 3 products that can be obtained from metal
Computer parts, electrical cables, car parts, phones...
Choose the correct option: PHYSICAL / CHEMICAL changes produce new substances
Chemical
Choose the correct option: Chemical changes are REVERSIBLE / IRRREVERSIBLE
Irreversible
Choose the correct option: MELTING / BOILING always produces water vapour.
Boiling
Choose the correct option: TEMPERATURE / BACTERIA can cause physical changes in matter.
Temperature
Decide if this is a physical change or a chemical change: a metal chair with some rust on it
chemical change
Decide if this is a physical change or a chemical change: lava turning into a rock
physical change
Decide if this is a physical change or a chemical change: bread dough rising
chemical change
Decide if this is a physical change or a chemical change: trees after a wildfire.
chemical change
Decide if this is a physical change or a chemical change: Water boiling in a kettle.
physical change
Decide if this is a physical change or a chemical change: A solid turns into a gas
physical change
Name these 3 processes
Fermentation, oxidation and combustion
How is this process called?
Magnetic separation
How is this process called?
Evaporation
How is this process called?
Filtration
How is this process called?
Distillation
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