Properties and changes of materials - Homework quiz

Scientists talk about the properties of different materials. Materials are . . .

• a piece of cloth used for making clothes.

• the substances that objects are made from.

You can see through _ _ _ _ _ _ _ _ _ _ _ materials. They let light through and are completely clear.

• glass

• opaque

• transparent

• translucent

Imagine you are building a table. Which two properties of wood make it a good material to use?

• strong

• flammable

• opaque

• rigid

• flexible

An electrical _ _ _ _ _ _ _ _ _ allows electricity to pass through it.

• insulator

• conductor

When a solid dissolves in a liquid, a _ _ _ _ _ _ _ _ is formed.

• solushun

• solution

• mixture

• soluble

When you are mixing a solid with a liquid, how do you know when the solid has completely dissolved?

• The liquid starts to fizz.

• You can't see any solid.

• The solid sinks to the bottom.

• The liquid goes cloudy.

Tom stirs sugar into a cup of iced coffee and times how long it takes to dissolve. He notices that when he stirs the same amount of sugar into a cup of hot coffee, the sugar takes . . .

• more time to dissolve.

• the same amount of time to dissolve.

• less time to dissolve.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When you separate a mixture, you . . .

• split it up into the different materials it was made from.

• mix two or more different materials together.

• pour it into different containers.

What are two uses for a sieve?

• to separate a mixture of two liquids

• to separate a mixture of a solid and a liquid

• to separate a mixture of similar-sized solids

• to separate a mixture of a gas and a liquid

• to separate a mixture of different-sized solids

Which of these mixtures can't you separate by sieving or filtering?

• sand and water

• salt and water

• marbles and sand

• salt and marbles