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WorksheetsMaterial changes
Total questions: 25
Worksheet time: 14mins
Burning of candle wax is a ________change
Reversible change
Irreversible change
Burning of paper is a _______________ change
Reversible change
Irreversible change
A popsicle is a.....
gas
liquid
solid
How to separate flour from iron nail?
Hand-picking method
Filtration method
Floatation method
Magnetic attraction
How to separate the jelly beans?
Filtration method
Sieving method
Hand-picking method
Floatation method
How to separate tea leaves from the water?
Magnetic attractions
Filtration method
Floatation method
Hand-picking method
jellatin powder in hot water
soluble
insoluble
oil-based paint in water
solute
insoluble
When a soluble substances dissolves, it usually leaves behind a __________________ liquid and we cannot ___________________ it.
cloudy, see
clear, taste
clear, see
cloudy, taste
Sugar is a __________________ and water is a __________________. Together, they make a ___________________.
solvent, solute, solution
solution, solvent, solute
solute, solvent, solution
When an insoluble substance cannot dissolve, it usually leaves behind a __________________ liquid with suspended particles and particles at the _________________ of the cup.
cloudy, bottom
clear, top
clear, bottom
cloudy, top
Flour is soluble in water.
True
False
Pink Lemonade Mix
Soluble
Insoluble
toasted bread
physical change
chemical change
nuclear change
molding clay into art
physical change
chemical change
nuclear change
chemicals reacting in a glow stick to cause a glow
physical change
chemical change
nuclear change
Sieving involves
Using only kitchen appliances to separate mixtures
Large particles getting caught in a barrier and smaller particles passing through
Small particles getting caught in a barrier and larger particles passing through
Separating a liquid from another liquid
The difference between sieving and filtering is
Sieving separates solid particles, filtration separates solids from liquids
One uses a spinning motion, while the other doesn't
Sieving separates solids from liquids, filtration separates solid particles
There are no differences
Separating sand and gravel is an example of
Sieving
Centrifuging
Decanting
Filtering
Magnetic separation separates ____________ materials from ___________ materials
Solid; Liquid
Magnetic; Non-magnetic
Small particle; Large particle
Liquid; Gas
Why can't filtration be used to separate sugar from water?
Sugar dissolves in water which makes it soluble
Sugar particles are too small and will fall through the holes of a filter
The water will tear the filter paper
It actually can separate sugar from water
How would you separate a mixture of sand and salt
Place the sand and salt in a pan and decant them with water
Add water to dissolve the sugar. Then use a filter to separate the sugar water from the sand
Place the sand and salt in a centrifuge. The spinning will cause separation
Magnetic separation will separate the magnetic sand and non-magnetic salt
You accidentally drop hundreds and thousands into flour your mum is using to bake a cake. How do I separate them?
Use a hand held vacuum cleaner
Use a colander. Only the flour will go through the holes
Use a sieve. Only the flour will go through the fine holes
Put them in a salad strainer- flour is the same as lettuce
