S8P1a Practice Test- Pure Substances vs. Mixtures

Which is an example of a heterogeneous mixture?

• gasoline

• diet soda

• grape juice

• flour and water

The chemical formula for glucose is C₆H₁₂O₆, so it is classified as a(n)

• element

• pure substance

• mixture

• solution

Tags

NGSS.MS-PS1-1

A pure substance that cannot be broken down by chemical or physical means is a(n)

• element

• compound

• mixture

• acid

Comparing Orange Juice, salt water, skim milk, and distilled water, which of the four is a compound.

• OJ

• Salt water

• Skim milk

• Distilled water

Tags

NGSS.MS-PS1-1

Which of the following is a compound? Sodium (Na), Water (H₂O), Nitrogen (N₂), and Chlorine (Cl)

• Sodium

• Water

• Nitrogen

• Chlorine

Tags

NGSS.MS-PS1-1

If I mix together some sand and salt, what type of mixture would I have?

• not a mixture

• mixture

• compound

• elements

Salt, NaCl, is a pure substance, while salt water is a mixture. What this means is that the ratio of sodium to chlorine in salt _________________, and the ratio of salt to water in the saltwater solution _________________________.

• is constant; can be altered

• can be altered; is constant

• is constant; is constant too

• can be altered; can be altered too

A mixture is what you get when combine two substances in such a way that no chemical reaction occurs between the components. A solution is a mixture that looks exactly the same everywhere. Which of these mixtures is a solution?

• a fruit salad

• a chocolate chip cookie

• a mixture of sugar and salt

• a mixture of sugar and water.

Ice cream in a bowl with whipped cream and sprinkles is BEST described as

• a mixture

• an element

• a compound

• a substance

A student drops some metal paper clips in a box of sand. The student uses a magnet to separate the metal paper clips from the sand. The reason this works is that the sand and paper clips together are a

• mixture

• element

• compound

• substance