WorksheetsChemistry test 2 Review Chemical Changes and Elements/Compounds
Total questions: 50
Worksheet time: 42mins
Name
Class
Date
1.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties
2.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
3.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
4.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
5.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
6.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
7.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
8.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
9.
Kim puts an ice cube in a beaker and it melts. This is a good example of:
a)
a physical change.
b)
a chemical change.
c)
an experiment.
d)
an analysis.
10.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
11.
When you break a cracker into pieces it is a
a)
Chemical change
b)
Physical change
c)
Chemical Weathering
d)
Physical Weathering
12.
Adding baking soda and vinegar together and it fizzes and creates carbon dioxide.
a)
Chemical
b)
Physical
13.
Which is a physical change?
a)
burning match
b)
vinegar in baking soda
c)
melting butter
d)
cooking an egg
14.
Which is a Chemical property?
a)
Thermal Conductivity
b)
Density
c)
Malleability
d)
Flammability
15.
Liv lit a match and said it was a physical change. Is she correct?
a)
Yes
b)
No
c)
I dunno...
d)
...
16.
Jayden asked Gabe what she could do to an egg for a chemical change. Gabe answered correctly and said...
a)
You can drop the egg.
b)
You can cook the egg.
c)
You can crack the egg.
d)
You can paint the egg.
17.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
18.
what is the definition of chemical change?
a)
any change that results in the formation of new chemical substances.
b)
changing clothes
c)
matter cannot be created or destroyed, only change form
d)
changes affecting the form of a chemical substance, but not its chemical composition.
19.
what is burning?
a)
physical change
b)
physical property
c)
chemical change
d)
chemical property
20.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change
c)
evaporation; physical change
d)
condensation; chemical change
21.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
22.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical
b)
Chemical
23.
Is mold growing on cheese a physical or chemical change?
a)
Physical
b)
Chemical
24.
Is sharpening a pencil a physical or chemical change?
a)
Physical
b)
Chemical
25.
Is copper tarnishing a physical or chemical change?
a)
Physical
b)
Chemical
26.
Which of these grouping of elements could have the characteristic of brittle?
a)
Metal
b)
Nonmetal
27.
Iron is a good conductor, malleable and magnetic. What type of element is Iron?
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
28.
Which element is a metalloid?
a)
Titanium
b)
Selenium
c)
Potassium
d)
Polonium
29.
What does brittle mean?
a)
shiny
b)
able to be hammered into different shapes
c)
able to be drawn into a wire
d)
breaks or shatters easily
30.
What does it mean to be ductile?
a)
able to be hammered into different shapes
b)
able to be drawn into a wire
c)
heavy for their size
d)
break or shatter easily
31.
A substance that is dull, brittle, and a nonconductor would be classified as a
a)
metal
b)
nonnmetal
c)
metalloid
d)
metallica
32.
Metals are located on the
a)
right side of the zig-zag line
b)
left side of the zig-zag line
c)
along the zig-zag line
33.
Green color represents
a)
metals
b)
nonmetals
c)
metalloids
34.
Purple color represents
a)
metals
b)
nonmetals
c)
metalloids
35.
Peach or orange color represents
a)
metals
b)
nonmetals
c)
metalloids
36.
Metalloids are well known for being
a)
dense
b)
poor conductor
c)
good conductor
d)
semiconductor
37.
Students test an object. Its shiny, bends easily and conduct electricity. The object is a _________.
a)
metal
b)
nonmetal
c)
metalloid
d)
atom
38.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
39.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
40.
The law of conservation of matter states that
a)
chemical reactions change matter.
b)
in chemical reactions, the identity of reactants and products is conserved.
c)
atoms are neither created nor destroyed in chemical reactions.
d)
a chemical equation must be balanced.
41.
How many elements are in the compound below?
H2SO4
H2SO4
a)
6
b)
9
c)
3
d)
2
42.
Which of the following is an element?
a)
O2
b)
H2O
c)
NaCl
d)
C6H2O3
43.
How many elements are in the compound below?
Mg(NO3)2
Mg(NO3)2
a)
7
b)
5
c)
2
d)
3
44.
How many elements are in the compound below?
Cr(NH3)6(NO3)3
Cr(NH3)6(NO3)3
a)
3
b)
4
c)
15
d)
6
45.
How many elements are present in this compound?
Mg2As3COHNi2
Mg2As3COHNi2
a)
2
b)
4
c)
6
d)
10
46.
Green bananas turning yellow on their own as they ripen.
a)
Chemical Change
b)
Physical Change
47.
Baking a cake by mixing flour, sugar, chocolate powder, eggs, and milk, and then heating them in the oven.
a)
Chemical Change
b)
Physical Change
48.
Blue liquid and yellow liquid mixed to make a green liquid
a)
Chemical Change
b)
Physical Change
49.
Boiling water
a)
Chemical Change
b)
Physical Change
50.
hydrochloric acid reacts with magnesium to produce hydrogen gass
a)
physical change
b)
chemical change
100 %
