G3 Ca 2 Revision

A pair of students are discussing if a jar containing peanuts, pecans, and walnuts is a mixture. The student's ideas are listed below.

Student 1- "All of the items are nuts. The jar does not contain a mixture."

Student 2 - "There are different kinds of nuts in the jar. They make a mixture."

Which student provides the best explanation?

• Student 1 has the best explanation because all of the items are nuts.

• Student 1 has the best explanation because the nuts are the same size.

• Student 2 has the best explanation because the nuts are not all the same kind.

• Student 2 has the best explanation because the nuts are the same color.

A student puts metal paper clips, metal screws, and metal washers into a container. Which of the following best describes these materials?

• mixture

• plastic

• liquid

• magnets

A mixture can be created by –

• pouring some water into a glass.

• combining two or more materials.

• blowing air through a straw.

• melting a solid to form a liquid.

What tool can be used to easily separate a mixture of iron filings and plastic paper clips?

• Beaker

• Strainer

• Balance

• Magnet

How do we know that a salad is a mixture?

• The salad is made up of different types of food.

• Bits of the salad can be picked up with a fork.

• The salad’s mass can be measured with a balance.

• The items in the salad are mostly solid.

The sieve can separate ___________ from water.

• sand

• salt

• coffee powder

• stones

Which of these can be removed using a filter paper?

• pebbles

• soap powder

• coffee powder

• milk powder

Which is the correct meaning for the word dissolve?

• method of separating solid from a liquid

• method to separate 2 solids

• when a substance breaks into smaller pieces and as if its 'disappear'.

• contains one material

Filter paper can separate solids that have not dissolved. Which can be separated using filtering?

• vinegar and water

• sugar and water

• tea leaves and water

• baking powder and water

Which is the method used to separate the solids?

• Filtration

• Sieving

• Evaporation

• Sinking