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Chemistry

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

An electron is

a)

positively charged

b)

neutral

c)

negatively charged

2.
Freezing Juice?
a)
Physical Change
b)
Chemical Change
3.
Rotting bananas?
a)
Physical Change
b)
Chemical Change
4.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
5.
Is sqeezing organges to make orange juice a phyical or chemcial change?
a)
physical
b)
chemical
6.

Is melting butter for popcorn a chemical or physical change?

a)

chemical

b)

physical

7.

Rust on an iron bar is an example of chemical change.

a)

True

b)

False

8.

A pure substance containing only one kind of atom.

a)

element

b)

mixture

c)

compound

9.
Can only be separated by chemical means.
a)
element
b)
mixture
c)
compound
10.
The ability of a substance to be pounded or rolled into thin sheets
a)
State
b)
Ductility
c)
Malleability
d)
Thermal Conductivity
11.
Physical or Chemical?  Water is nonflammable
a)
Physical
b)
Chemical
c)
Neither
12.
Physical or Chemical Property?  The temperature of boiling water is 100 degrees Celsius.
a)
Physical
b)
Chemical
c)
Neither
13.

The amount of matter something contains is its ______________.

a)

gas

b)

solid

c)

weight

d)

mass

14.

__________ are the building blocks of life.

a)

ions

b)

molecules

c)

atoms

d)

none

15.
What kind of change is a phase change?
a)
Physical - it's still the same substance
b)
chemical - it's made of chemicals 
16.
Which of the following reactions is a combustion reaction ? 
a)
MgCO3 + O2 → MgO + CO2  
b)
C3H8 + 5O2 → 3CO2 + 4H2O 
c)
6CO2 + 6H2O → C6H12O6 + 6O2 
d)
6CO2 + 6H2O → C6H12O6 + 6O2 
17.

what is an atom

a)

smallest part of the universe

b)

smallest part of a substance

c)

smallest part of anything

d)

smallest part of water

18.

protons

a)

negative charge, nucleus

b)

positive charge, shells

c)

positive charge , nucleus

d)

neutral charge, nucleus

19.

a charged atom

a)

neutral

b)

isotope

c)

ion

d)

nucleus

20.

Which of the following indicate that a chemical reaction has occurred?

a)

The formation of gas bubbles

b)

An odor

c)

a change in color

d)

all of these indicate a chemical reaction

21.

Which is an example of a chemical reaction?

a)

Ice melting

b)

wood burning

c)

salt stirred into water

d)

rain falling

22.

Using a magnet is one way to separate a mixture of sand particles and water

a)

True

b)

False

23.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

24.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
25.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0

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