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Chemical Vs Physical Changes
Test Description: Chemical vs Physical Changes
Instructions: Answer all questions to get your test result.
1) Dissolving salt in water is a ______________
A
None of the above
B
Chemical Change
C
Physical Change
2) A straight piece of wire is coiled to form a spring. What type of change?
A
Physical Change
B
None of the above
C
Chemical Change
D
*
3) Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.
A
*
B
physical, chemical
C
chemical, physical
D
none of the above
4) In a fireworks show, the fireworks explode giving off heat and light. What type of change?
A
None of the above
B
Chemical Change
C
Physical Change
D
*
5) True or False. Changing the size and shapes of pieces of wood would be a chemical change.
A
*
B
*
C
True
D
False
6) True or False. When ice cream melts, a chemical change occurs.
A
*
B
False
C
*
D
True
7) Liquid water particles boiling and turning into a gas (water vapor). Physical or Chemical?
A
*
B
None of the above
C
Physical
D
Chemical
8) You blow dry your wet hair. What type of change?
A
Chemical change
B
*
C
*
D
Physical change
9) You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. (Rust)
A
Chemical Change
B
*
C
*
D
Physical change
10) _______________ changes happen when atomic bonds are broken or created during chemical reactions.
A
None of the above
B
Physical
C
Chemical
D
No
11) You step on a soda can and crush it. Why is this a physical change?
A
the molecules in the can are still the same
B
all of the above
C
you only changed the shape of the can
D
no chemical bonds were created or destroyed
12) Which of the following is evidence of a chemical change?
A
Color change
B
all of the above
C
Heat forming
D
Bubbles
13) baking soda + vinegar → gas + white solid Which of the following is a reactant in the equation?
A
Gas
B
none of the above
C
white solid
D
baking soda
14) Which of the following is NOT a chemical change?
A
antacid that neutralizes stomach acid
B
salt being mixed with water
C
silver tarnishing in open air
D
juice the ferments
15) Scientists study the characteristics of substances to better understand the natural world. Which of the following is not a chemical or physical characteristic of a substance?
A
density
B
odor
C
cost
D
color
16) What kind of chemical change might be observed in cars driven in coastal areas or in areas that use salt to treat icy roads?
A
corrosion
B
precipitation
C
formation of salt crystals
D
dents and dings
17) Which of the following is an example of a chemical change?
A
wood burning in a fireplace
B
ice melting in a glass
C
the addition of food coloring to a glass of water
D
defrosting food in a microwave oven
18) In a chemical equations, the compounds or elements on the left side of the arrow are called the _________________________.
A
Sum
B
Products
C
Reactants
D
Result
19) Which of the following is a physical change?
A
MIxing Cookie Dough
B
burning wood
C
Baking a Cake
D
Frying Eggs
20) Which of the following is NOT a physical change?
A
dying your hair
B
adding food coloring to water
C
breaking an egg
D
nailing together boards of wood
*select an answer for all questions
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