Unit 1 - Review

A mixtures is a combination of two or more____________ in which no new kinds of matter are formed.

•  subtances
• parts
• leaves
• pebbles

Making a mixture results in ___________________ only.

• chemical reactions
• separate parts
• physical changes
• two subtances

Two substances physically combined and that appears the same throughout is classified as

• A homogeneous mixture
• A heterogeneous mixture
• An element
•   A compound

Cookies and cream ice cream would be classified as

• A homogenous mixture
• A heterogenous mixture
• An element
• A compound

Two elements chemically combined defines

• A homogeneous mixture
• A heterogeneous mixture
• An element
• A compound

Tags

NGSS.MS-PS1-1

What type of mixture is this?

• heterogeneous 
• homogeneous

What type of mixture is this?

• heterogeneous 
• homogeneous

Identify the method used in separating the following substances?

• Decantation

• Centrifugation

• Distillation

Amy and her brother, Sam, were on a school trip to a nearby seashore.Back at school Sam asked Amy, "How can we get the seaweed out?"

What do you think Amy and Sam should do to separate the seaweed and sand from their seawater?

• filter it

• evaporate it

• condense it

Tags

NGSS.MS-ETS1-2

"Is it safe to drink now?" asked Sam. "Oh no," exclaimed Amy, "it's still full of salt!"

"How can we get the salt out then?" Sam wanted to know. "Oh that's easy!" laughed Amy.

Here's the apparatus Amy set up:

What happened when Amy heated the seawater gently?

• Sam saw all the water boil away

• Sam saw steam leaving the dish

• Sam saw the water turn blue