Mixing materials
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Solids, Liquids and gasses
SubtopicSolids, Liquids and gasses under Mixing materials for Grade 3 IGCSE.
Preview questions (no answers)
- 1.
Which material is best for making a container to hold a liquid?
A.A sieve
B.A solid plastic cup
C.A piece of paper with holes
D.A gas balloon
- 2.
What happens when you mix vinegar (liquid) and baking soda (solid)?
A.They turn into a big solid rock
B.They create bubbles of gas
C.They freeze instantly
D.Nothing happens
- 3.
Which of these is a pure substance, not a mixture?
A.Salt water
B.Air
C.Pure Gold
D.Soil
- 4.
What do we use to separate a mixture of raisins and flour?
A.A magnet
B.A sieve
C.A filter
D.A heater
- 5.
Which material will dissolve in water?
A.Plastic
B.Wood
C.Honey
D.Glass
- 6.
What is the best description of a 'mixture'?
A.A single type of material
B.Two or more materials put together
C.When a solid turns into a gas
D.When something is heated
- 7.
Which of these tools uses a mesh to separate materials by size?
A.Filter paper
B.Sieve
C.Magnet
D.Tweezers
- 8.
Which of the following is a reversible change?
A.Toasting bread
B.Melting chocolate
C.Frying an egg
D.Burning a match
- 9.
A student adds a teaspoon of salt to water and it dissolves. Then they add another, and it dissolves. They keep adding until salt remains at the bottom. What could they do to make that remaining salt dissolve?
A.Cool the water down
B.Add more water or heat the water
C.Take the water out
D.Wait for the water to evaporate
- 10.
What would happen if you tried to filter a solution of salt and water?
A.The salt would stay on the filter paper
B.The salt and water would both pass through the filter paper
C.The filter paper would catch the water and let the salt through
D.The filter paper would dissolve
Download the worksheet for Mixing materials - Solids, Liquids and gasses to practice offline. It includes additional chapter-level practice questions.
Separating Mixtures
SubtopicSeparating Mixtures under Mixing materials for Grade 3 IGCSE.
Preview questions (no answers)
- 1.
A student finds that after evaporating a clear liquid, no solid is left behind. What can they conclude?
A.The solid was invisible
B.The solid evaporated too
C.The liquid was likely a pure substance, not a solution with a solid
D.The filter paper caught the solid earlier
- 2.
Which of these mixtures requires the most steps to separate completely?
A.Sand and water
B.Iron filings and sand
C.Salt, sand, and iron filings
D.Sugar and water
- 3.
What is the residue in a filtration experiment?
A.The liquid that goes through
B.The solid that stays on the paper
C.The container holding the liquid
D.The gas that escapes
- 4.
- Separating Mixtures: practice question 1 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 5.
- Separating Mixtures: practice question 2 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 6.
- Separating Mixtures: practice question 3 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 7.
- Separating Mixtures: practice question 4 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 8.
- Separating Mixtures: practice question 5 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 9.
- Separating Mixtures: practice question 6 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
- 10.
- Separating Mixtures: practice question 7 for Mixing materials?
A.Option A
B.Option B
C.Option C
D.Option D
Download the worksheet for Mixing materials - Separating Mixtures to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
What is left on a filter paper if you pour a mixture of sand and water through it?
A.Salt
B.Water
C.Sand
D.Nothing
- 2.
Which of these statements is correct?
A.Dissolving is the same as melting
B.Dissolving involves a liquid and a solid mixing
C.Only sand dissolves in water
D.Salt becomes invisible because it is gone
- 3.
If you mix oil and water, do they dissolve into each other?
A.Yes, perfectly
B.No, they stay as separate layers
C.Yes, but only if you stir
D.No, the oil turns into salt
- 4.
Which is NOT a mixture?
A.Salt and water
B.Sand and pebbles
C.Pure water
D.Sugar and salt
- 5.
Why is water called a 'universal solvent' in many science books?
A.It can dissolve many different substances
B.It is found in space
C.It is always blue
D.It never mixes with anything
- 6.
If a student wants to dissolve salt as fast as possible, they should use:
A.Cold water and no stirring
B.Warm water and no stirring
C.Cold water and stirring
D.Warm water and stirring
- 7.
Which of these is a way to see if a solid has dissolved without using your eyes?
A.Listening to it
B.Feeling the water for lumps
C.Smelling the water
D.Using a ruler
- 8.
A student adds a mysterious white powder to water. It fizzes and then the powder disappears. Is this just 'dissolving'?
A.Yes, it just dissolved fast
B.No, the fizzing indicates a chemical reaction occurred
C.Yes, fizzing always happens during dissolving
D.No, because the water stayed the same color
- 9.
What do we call the solid that is left behind on the filter paper after filtration?
A.Filtrate
B.Residue
C.Solvent
D.Solution
- 10.
Why does hot water usually dissolve more solid than cold water?
A.Hot water is lighter
B.Water particles move faster and have more space between them when hot
C.Hot water is more colorful
D.Cold water is too hard
Download the worksheet for Mixing materials - Dissolving to practice offline. It includes additional chapter-level practice questions.
Preview questions (no answers)
- 1.
Which of these mixtures is BEST separated by sieving rather than paper filtering?
A.Mud and water
B.Rocks and sand
C.Salt and water
D.Sugar and water
- 2.
When setting up a filter, why do we wet the filter paper slightly first?
A.To make it dissolve
B.To help it stick to the funnel
C.To make the water go faster
D.To change the color
- 3.
Which of these can pass through a filter paper?
A.Small stones
B.Soil particles
C.Water molecules
D.Twigs
- 4.
Filtering is based on the difference in ________ of the materials.
A.Color
B.Size
C.Weight
D.Taste
- 5.
If you want to separate salt from water, filtering won't work. What should you do instead?
A.Sieve the water
B.Freeze the water
C.Evaporate the water
D.Use a magnet
- 6.
When you filter a mixture of flour and water, the liquid that comes through is clear. Is the flour soluble or insoluble?
A.Soluble
B.Insoluble
C.Both
D.Neither
- 7.
What is the purpose of the tiny holes in filter paper?
A.To let only the solid pass through
B.To let only the liquid pass through
C.To make the paper lighter
D.To help the paper dissolve
- 8.
Which of these mixtures would require the FINEST filter to separate?
A.Bacteria in water
B.Pasta in water
C.Seashells in water
D.Bouncing balls in water
- 9.
What is the difference between filtering and evaporation for a salt-water mixture?
A.Filtration cannot remove the salt, but evaporation can
B.Filtration removes the salt, but evaporation does not
C.Both remove the salt equally well
D.Neither can remove the salt
- 10.
If a student uses a sieve with holes that are too big for the mixture they are trying to separate, what will happen?
A.The solid and liquid will both go through the sieve
B.The liquid will get stuck
C.The sieve will break
D.The solid will disappear
Download the worksheet for Mixing materials - Filtering to practice offline. It includes additional chapter-level practice questions.
Separating materials from Rocks
SubtopicSeparating materials from Rocks under Mixing materials for Grade 3 IGCSE.
Preview questions (no answers)
- 1.
If you use a sieve with 1cm holes, which of these will stay in the sieve?
A.Water
B.Fine sand
C.A rock that is 2cm wide
D.A tiny dust particle
- 2.
Which of these is the most likely to be found in a soil mixture?
A.Chocolate
B.Twigs and small stones
C.Plastic beads
D.Glass marbles
- 3.
What is a 'solution'?
A.A mixture where a solid dissolves in a liquid
B.A pile of rocks
C.A broken tool
D.A type of gas
- 4.
When sorting rocks by hand, which feature is most helpful?
A.Weight
B.Color and shape
C.Sound
D.Taste
- 5.
What do we call a mixture where a solid has completely dissolved in a liquid?
A.A suspension
B.A solution
C.A residue
D.An ore
- 6.
Which of these processes is a physical change where materials are combined but not chemically bonded?
A.Burning wood
B.Mixing sand and water
C.Baking a cake
D.Rusting iron
- 7.
Which of these materials is obtained by separating it from seawater?
A.Iron
B.Coal
C.Salt
D.Gold
- 8.
In the process of 'Panning for Gold', what acts as the 'sieve' to help separate materials?
A.The movement of the water and the shape of the pan
B.A piece of paper placed in the water
C.A magnet at the bottom of the pan
D.The heat of the sun
- 9.
A mixture of rice and flour is given to you. Which tool is best to separate them?
A.A fine-mesh sieve
B.A magnet
C.A filter paper and funnel
D.A large spoon for stirring
- 10.
Which statement about sieving is TRUE?
A.A sieve separates solids based on their size
B.A sieve separates materials based on their color
C.A sieve only works if the material is magnetic
D.A sieve can separate dissolved salt from water
Download the worksheet for Mixing materials - Separating materials from Rocks to practice offline. It includes additional chapter-level practice questions.