Unit 1 Chemistry

What vocabulary term is being described: Unique characteristic that helps identify a substance.

• matter

• substance

• property

• product

Tags

NGSS.MS-PS1-2

When calculating _____ you are determining the mass in a set volume of a substance.

• melting point

• solubility

• weight

• density

_________ is when on substance is able to dissolve in another.

• phase change

• substance

• density

• solubility

A ____ is made of 2 or more substances that DO NOT chemically combine.

• molecule

• mixture

• substance

• property

Something is considered a ________ when it is made of one type of material all the way through. An example could be water, chalk, vinegar, or copper.

• molecule

• chemical

• substance

• solvent

If you heat 1 tablespoon and 1 stick of butter, the amount of butter is different, but the ______________, or the temperature at which both samples of butter will begin to change to a liquid will remain the same.

• freezing point

• physical change

• chemical change

• melting point

Tags

NGSS.MS-PS1-4

Ice can change from a solid (ice) to liquid (water) to gas (water vapor). What vocabulary term does this describe?

• chemical reaction

• phase change

• melting point

• boiling point

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

According to scientific principle #6 properties (denstiy, hardness, melting point, solubility) of a substance will:

• change because it isn't possible to stay the same if the amount changes

• stay the same ONLY if the amount of the substance is the same

• stay the same, even if the amount of the substance is different

• change based on the amount of the substance present

Scientific principle #6 states: properties of a given substance are the same regardless of the amount of the substance. Based on this scientific principle, which options below will not change if the amount of a substance is increased?

• melting point of the substance

• volume of the substance

• mass of the substance

• density of the object

• solubility of the substance

A phase change IS NOT a chemical reaction. Choose the options that support this claim. You may choose more than one.

• The substance are mixed together and keep their properties

• The atoms making up the molecules are rearranged creating new substances

• The atoms and molecules are mixed together BUT do not create new molecules

• The atoms are rearranged creating a new product with a different arrangement of atoms

Tags

NGSS.MS-PS1-2