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8.5 D & E Pre-test

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Napomena autora:

8.5 D-E: Pretest on Elements vs Compounds (6th), Chemical Formulas, and Chemical vs. Physical Change (6th/7th)

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Pitanje 1
1.

Sort the following as either an ELEMENT or a COMPOUND

  • Oxygen

  • Water

  • Gold

  • Sugar

  • ELEMENTS

  • COMPOUNDS

Pitanje 2
2.

Idenitfy which of the following describe a compound. Choose ALL that apply.

Pitanje 3
3.
Pitanje 4
4.

How many TOTAL ATOMS are in this compound?

Pitanje 5
5.

How many ELEMENTS are in this compound?

Pitanje 6
6.

How many ATOMS of HYDROGEN (H) in this compound?

Pitanje 7
7.

Select all examples of chemical changes.

Pitanje 8
8.

Which of the following groups contains only examples of physical changes?

Pitanje 9
9.

A chemical change can best be defined as...

Pitanje 10
10.

Look at each situation and determine whether it is an example of a physical change or a chemical change:

Physical Change

Chemical Change

No change takes place

Cake batter to cake

Dissolving drink powder into water

Rubbing alcohol evaporates

Fireworks exploding