TBA 1 Review

In this diagram, Y represents...

• an element

• a molecule

• a mixture

• a compound

Tags

NGSS.MS-PS1-1

Wood is chopped into small pieces. Then, it is burned to cook food. This is an example of a ____ change followed by a ____ change.

• chemical, physical

• physical, chemical

• physical, physical

• chemical, chemical

Tags

NGSS.MS-PS1-2

This picture represents which of the following?

• element

• compound

• mixture

Tags

NGSS.MS-PS1-1

Which example is a compound?

• N₂

• Cu

• O₂

• H₂O₂

Tags

NGSS.MS-PS1-1

Which observations prove a chemical change occurred?

• State of matter change and boiling water bubbles

• Dissolving and expected color change

• Mixing and dissolving

• 
  Unexpected color change and temperature change

Tags

NGSS.MS-PS1-2

What is the difference between Co and CO?

• CO is an element but Co is a compound

• Nothing is different. They are the same thing.

• CO is two elements and Co is only one element

• Co is not a pure substance

Tags

NGSS.MS-PS1-1

A change that alters the identity of a substance resulting in a NEW substance with different properties. 

• physical change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How many different elements are in the compound?

• 1

• 3

• 24

• 12

Tags

NGSS.MS-PS1-1

Which of the following situations provides evidence that a chemical change has taken place?

• Water, when boiled, evaporates and turns into vapor.

• Sugar, when added to iced tea, dissolves into the liquid.

• Two liquids are mixed, and a solid substance forms.

• A piece of paper is cut into many small pieces.

Tags

NGSS.MS-PS1-2

True or False: Compounds are pure substances.

• True

• False