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8.5 D & E Pre-test

Last updated over 3 years ago

10 questions

Note from the author:

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6

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2

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3

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

Question 1

1.

Sort the following as either an ELEMENT or a COMPOUND

Oxygen
Water
Gold

Question 2

2.

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

Two or more elements chemically bonded together 

One element chemically bonded together 

Question 3

3.

In the chemical formula above, there are _______ atoms of Calcium, _______ atoms of Carbon, and _______ atoms of oxygen. 

Question 4

4.

How many TOTAL ATOMS are in this compound?

Question 5

5.

How many ELEMENTS are in this compound?

Question 6

6.

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

Question 7

7.

Question 8

8.

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

bread baking, bread being sliced, bread being digested

Water boiling, a paper being ripped, wood being burned

a piece of metal being bent, a piece of metal rusting, a piece of metal tarnishing

Alcohol evaporating, a tree branch cracking, a car getting a dent

Question 9

9.

A chemical change can best be defined as...

a change in which a new substance is formed

a change that occurs in which a reaction occurs

a change that causes the chemical formula of the matter to be rearrange into new matter

all of the choices can be used to define chemical change

Question 10

10.

Sugar

ELEMENTS 

COMPOUNDS

One single atom 

Has at least two capital letters in the chemical formula 

Has one capital letter in the chemical formula 

Select all examples of chemical changes.

Boiling water

Cooked pancakes

Soured Milk

Pencil shavings

Ice melting

Ash left after a fire

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