Pure Substances and Mixtures

The picture above shows several different compound models. What is true of compounds?

• Compounds are made of only one chemical element.

• Compounds are made of two or more different chemical elements.

• Compounds always contain at least hydrogen.

• Compounds must have at least three atoms that are chemically bonded.

Tags

NGSS.MS-PS1-1

Grape juice is an example of a solution in nature. What is the solvent in grape juice?

• Grapes

• Water

• Sugar

• Salt

Jasmine is making some macaroni and cheese for dinner. To begin, she places water in a pot on the stove. She adds salt to the water and heats the solution. What is the solute and solvent in this solution?

• Salt is the solvent and the water is the solute.

• Salt is the solute and the water is the solvent.

• Salt is the solute and heat is the solvent.

• Salt is the solvent and heat is the solute.

Jasmine is making some macaroni and cheese for dinner. To begin, she places water in a pot on the stove. She adds salt to the water and heats the solution. She then adds the noodles and cooks them until they are done. She adds cheese, butter, and milk. She stirs it completely. The substance in the pot is a(n)

• element

• compound

• homogenous mixture

• heterogenous mixture

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Trish brought trail mix to a party and Tim brought Soda. Which of the following statements is true about each item.

• They both brought mixtures but only Tim brought a solution.

• They both brought solutions but only Trish brought a mixture.

• They both brought mixtures but only Trish brought a solution.

• They both brought solutions but only Tim brought a mixture.

N (Nitrogen) is an example of a(n)

• compound

• element

• mixture

• photon

OH is an example of a(n)

• compound

• element

• mixture

• photon

Tags

NGSS.MS-PS1-1

Which is an example of a compound

• NO

• Fe

• Mg

• C

Tags

NGSS.MS-PS1-1

A substance that is made of only one type of atom is called a(n)

• compound

• element

• mixture

• solution

Tags

NGSS.MS-PS1-1

Two or more different types of atoms that are chemically combined in a fixed amount.

• compound

• element

• mixture

• photon

Tags

NGSS.MS-PS1-1