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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
particles in water are moving
B
water flows inside a cup just like in a river
C
water contains positive and negative charges
D
water can support many kinds of living things
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
are large enough to see with a microscope
D
move more slowly when cold
3) When the temperature of a substance increases, what happens to the speed of the molecules? They
A
are not measureable
B
stays the same
C
decrease in speed
D
increase in speed
4) What happens to the volume of most substances when the temperature increases? It
A
increases
B
stays the same
C
decreases
D
is not measureable
5) What happens to molecules in a liquid when it changes to a gas? The molecules have:
A
moved around from the container
B
moved slowly enough to escape the liquid
C
moved toward the other molecules
D
moved fast enough to escape the liquid
6) What would happen to a balloon if you put in in a freezer?
A
it will change color
B
it will stay the same
C
it will grow
D
it will shrink
7) Sidewalks have “cracks” which are imprinted every meter or two. What is the purpose of these cracks?
A
They help prevent breaking when the cement is heated
B
The sidewalk looks better and can be more easily manufactured
C
It makes the sidewalk easier to measure
D
They have always been there.
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
is changing phases and will melt if it gets hot enough
C
has hinges that rust in warm weather
D
has expanded and the door frame has not
9) An increase in temperature of a liquid causes it to change to which phase?
A
Solid
B
Gas
C
Liquid
D
Pick me I am the Wrong Answer
10) What color is the white house?
A
pink
B
Green
C
white
D
yellow with a dash of red
*select an answer for all questions
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