Substances/Solution/Acids/Bases

What is a substance?

• Matter with a fixed composition and properties

• Matter that can be broken down by physical processes

• A type of chemical reaction

• A mixture of different elements.

An element cannot be broken down into simpler substances. Only a ______ process can change a substance into one or more new substances.

• A) physical

• B) chemical

• C) biological

• D) mechanical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a compound?

• Oxygen

• Water

• Nitrogen

• Helium

Tags

NGSS.MS-PS1-1

What is a mixture?

• A combination of substances bonded together

• A combination of substances not bonded together and can be separated by physical processes

• A single substance with a fixed composition

• A chemical compound

Fill in the blank: Two or more substances evenly mixed on a molecular level but not bonded together are called a ________ mixture.

• Heterogeneous

• Homogeneous

• Complex

• Simple

What is the substance called that dissolves in a solution?

• Solvent

• Solute

• Precipitate

• Mineral

A solid that falls out of a solution is called a ______.

• Solvent

• Solute

• Precipitate

• Mineral

Which of the following is an example of a liquid-solid solution?

• A) Vinegar

• B) Carbonated beverage

• C) Salt water

• D) Lemonade

Fill in the blank: Vinegar is a ______ solution made of water and acetic acid.

• A) liquid-solid

• B) liquid-gas

• C) liquid-liquid

• D) gas-liquid

What is the solvent in a gas-gas solution such as air?

• Oxygen

• Nitrogen

• Argon

• Carbon Dioxide