3rd Grade Mixtures

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

TRUE or FALSE

A Plastic Ball, a Paperclip, a Wood Block and a Glass Marble put together in a bowl is a mixture.

• True

• False

A student makes the following observations in their notebook.

Which of the containers is most likely a mixture?

• 3

• 4

• 1

• 2

A group of students is exploring what happens when rocks, soil, and water are combined. What safety tool should they use and what was created when the material was combined.

• graduated cylinder, mixture

• goggles, mixture

• computer, solid

• microscope, solid

Tags

NGSS.5-PS1-4

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 and plastic paper clips?

• Beaker

• Strainer

• Balance

• Magnet

All of the following are mixtures EXCEPT

• iron filings in sand.

• crushed rock and glass.

• glass marbles in a pile.

• peanuts and raisins together.

How can a student make a sample of sand part of a mixture?

• Place the sample in a closed container and shake it.

• Add gravel to the sand sample and stir them together.

• Pour the sample into a bowl and warm it in sunlight.

• Spread out the sample of sand on a paper towel.

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.