Matter and Mixtures

Kevin wants to create a mixture, but NOT a solution. He looks in his kitchen and finds milk, salt, water, some chocolate syrup, and some peanuts. Which of the following describes ingredients that Kevin could use to create the mixture?

• salt and water

• peanuts and milk

• milk and chocolate syrup

• water and milk

Mom makes a drink solution that looks too light in color. How could you describe her solution?

• concentrated

• diluted

• evaporated

• heated

The Ace Sand Company separates the sand they mine from quarries into different grades- coarse, fine, and extra-fine. What process does the company use to separate the particles of sand.

• evaporation

• filtration

• magnetic attraction

• sifting or screening

People often put sugar in their tea to make it sweet. When will the sugar dissolve the fastest?

• when the tea is in a tall glass

• when the tea is dark

• when the tea is cold

• when the tea s hot

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

How does the particle size of a substance affect the way it dissolves?

• The larger the particles, the quicker they will dissolve.

• The smaller the particles, the quicker they will dissolve.

• The larger the particles, the less solvent there is to dissolve them.

• The smaller the particles, the fewer of them there are to dissolve.

Which of the following would be an appropriate way to use chromatography to separate a solution?

• to separate salt from ocean water

• to separate inks used in a marker

• to separate a sugar water solution

• to separate red food coloring from the sugar in a punch drink

Which of these is an example of a chemical change?

• Wood burns in a fire

• A window breaks when hit by a baseball

• A tree falls when pushed by wind

• Water evaporates when boiled

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Jamal is camping near a mountain stream. He collects a bucket of water to use for drinking. Before he boils it, he notices small bits of leaves at the bottom of the container. What is the best way to separate the leaves from the water so that he can drink it?

• Use a magnet to collect the bits of leaf.

• Skim the leaves off if they float to the top of the water.

• Filter the water through a piece of fabric.

• Evaporate the water which will leave the bits of leaf at the bottom of the container.

Tara is working with solutions in the science lab. If she wants to concentrate her solution, she must ___________.

• add more solute

• add more solvent

• separate the solution

• stir the solution faster

Solvent= _________________

• two or more substances which are combined but can be taken apart again

• the amount of solute in a solvent determines this

• occurs when two or more substances are combined and form create a new substance that cannot easily return to its original form

• the part of a solution that is in the greatest amount and is usually a liquid