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Review 1st Semester Diffusion
Test Description: NA
Instructions: Answer all questions to get your test result.
1) A drop of food coloring placed into a glass of water spreads out evenly, coloring all the water. What does this evidence suggest?
A
water can support many kinds of living things
B
water contains positive and negative charges
C
water flows inside a cup just like in a river
D
particles in water are moving
2) A bottle of perfume is opened and the smell travels across the room. What does this observation suggest? Particles of perfume
A
are always in motion
B
move faster when they are cold
C
move more slowly when cold
D
are large enough to see with a microscope
3) When the temperature of a substance increases, what happens to the speed of the molecules? They
A
increase in speed
B
decrease in speed
C
are not measureable
D
stays the same
4) What happens to the volume of most substances when the temperature increases? It
A
stays the same
B
is not measureable
C
increases
D
decreases
5) What happens to molecules in a liquid when it changes to a gas? The molecules have:
A
moved slowly enough to escape the liquid
B
moved fast enough to escape the liquid
C
moved toward the other molecules
D
moved around from the container
6) What would happen to a balloon if you put in in a freezer?
A
it will shrink
B
it will stay the same
C
it will grow
D
it will change color
7) Sidewalks have “cracks” which are imprinted every meter or two. What is the purpose of these cracks?
A
They have always been there.
B
The sidewalk looks better and can be more easily manufactured
C
They help prevent breaking when the cement is heated
D
It makes the sidewalk easier to measure
8) Why might a metal door be difficult to open during hot weather? The door
A
has contracted and the door frame has expanded
B
has expanded and the door frame has not
C
is changing phases and will melt if it gets hot enough
D
has hinges that rust in warm weather
9) An increase in temperature of a liquid causes it to change to which phase?
A
Liquid
B
Pick me I am the Wrong Answer
C
Gas
D
Solid
10) What color is the white house?
A
yellow with a dash of red
B
white
C
pink
D
Green
*select an answer for all questions
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