Mixtures

Which tools are best for separating a mixtures of sand, iron filings, and water?

• Hot plate and filter

• Tweezers and filter

• Filter and magnet

• Magnet and hot plate

Which substances, when mixed together, maintain their original physical properties?

• gravel and water

• wood chips, water and sand

• sand and water

• all of the above

All of the following are examples of containers filled with mixtures EXCEPT -

• a jar filled with trail mix

• a glass filled with lemonade

• a bowl of cereal with milk

• a cup of fruit salad

A student makes a garden salad by stirring lettuce, tomatoes, carrots, and croutons together in a bowl. Why is the garden salad a mixture?

• the student cut the vegetables into equally sized pieces

• the vegetables are combined by maintain their physical properties

• the croutons cannot be taken out of the salad

• the salad grew from a garden

When separating saltwater using a hot plate, what precaution should students use?

• unplug the hot plate if water splashes on the cord

• follow the teacher's instructions and wear safety goggles

• leave the hot plate plugged in after the investigation is complete

• follow the teacher's instructions to record results in a notebook

Which mixture can be separated using a filter?

• sand and iron filings

• saltwater

• sand and water

• none of the above

A cup of orange juice with pulp is poured into a glass. Which of these procedures could be done to separate the juice from the pulp?

• pour the juice through a coffee filter

• heat the juice in a pot until boiling

• pour the juice in another cup

• allow the mixture to settle, leaving the pulp at the bottom of the glass

Which of the following mixtures can be separated with a magnet?

• sand and salt

• sand and iron filings

• sugar and water

• saltwater

All of these can be separated easily EXCEPT -

• nuts, bolts, and screws

• powdered drink mix, sugar and water

• sand and water

• iron filings and sand

A mixture of iron filings and chalk dust is placed on a plate. Which of the following could be done to gather the iron filings?

• Pour the mixture into a funnel

• Put the mixture in a pot on the stove

• Run a magnet over the mixture

• Filter the mixture through a strainer