science chapter 2-3 multiple choice Flashcards
1
Q
which of the following are pure substances A. solutions B. compounds C. homogenous mixtures D. colloids
A
compounds
2
Q
which of the following is a NOT a pure substance A. milk B. oxygen C. water D. carbon dioxide
A
milk
3
Q
a substance that is made up of only one kind of atom A. compound B. homogenous mixture C. element D. solution
A
element
4
Q
that is the symbol for aluminum A. AL B. Al C. Au D. A
A
Al
5
Q
the symbol for gold is... A. Au B. Al C. GI D. Go
A
Au
6
Q
water is a compound because it…
A. can be broken down into simpler substances
B. always has two hydrogen atoms for each oxygen atoms
C. is made of water atoms joined together
D. both A and B
A
both A and B
7
Q
which of the following is a heterogenous mixture... A. water in a swimming pool B. sugar water C. a jar of mixed nuts D. stainless steel
A
a jar of mixed nuts
8
Q
which of the following is a mixture... A. carbon dioxide B. silicon C. silicon dioxide D. sand
A
sand
9
Q
a mixture can be classified as a solution, suspension, or colloid based on the.... A. number of particles it contains B. size of its largest particles C. color of its particles D. size of its smallest particles
A
size of its largest particles
10
Q
you are about to open a container of soy milk, but notice that there are instructions to "shake well before serving" The soy milk is most likely a.... A. solution B. pure substance C. colloid D. suspension
A
suspension
11
Q
which of the following has the highest viscosity... A. corn syrup B. milk C. water D. orange juice
A
corn syrup
12
Q
a substance has a melting point of 0 degrees C and a boiling point of 100 degrees C the substance is most likely.... A. water B. hydrogen C. gold D. table salt
A
water
13
Q
a material that is malleable and conducts electricity is most likely... A. wood B. ice C. a metal D. motor oil
A
a metal
14
Q
filtration can be used to separate mixtures based on... A. their boiling points B. their densities C. their melting points D. the size of their particles
A
the size of their particles
15
Q
when a physical change in a sample occurs, which of the following does NOT change... A. shape B. volume C. temperature D. composition
A
composition
16
Q
which of the following is a physical change…
A. sawing a piece of wood in half
B. burning a piece of wood
C. rust forming on an iron fence
D. a copper roof changing color from red to green
A
sawing a piece of wood in half
17
Q
flammability is a materials ability to burn in the presence of... A. hydrogen B. nitrogen C. oxygen D. carbon dioxide
A
oxygen
18
Q
a substance that has high reactivity... A. easily combines chemically with other substances B. burns in the presence of water C. displaces dissolved oxygen D. has a high boiling point
A
easily combines chemically with other substances
19
Q
which of the following is NOT a clue that a chemical change has occurred? A. change in color B. production of gas C. formation of a precipitate D. change in shape
A
change in shape
20
Q
which of the following is a chemical change…
A. ice melting
B. ice being carved
C. water boiling
D. water breaking down into hydrogen and oxygen
A
water breaking down into hydrogen and oxygen
21
Q
a gas has…
A. a definite shape but no definite volume
B. a definite volume but no definite shape
C. no definite shape or definite volume
D. a definite volume and definite shape
A
no definite shape or definite volume
22
Q
99% of all the matter that can be observed in the universe exists as... A. gases B. plasmas C. liquids D. solids
A
plasmas
23
Q
matter that has a definite volume but no definite shape is a... A. liquid B. solid C. gas D. plasma
A
liquid
24
Q
in which of the substances in figure 3-1 are the forces attraction among the particles so weak that they can be ignored under ordinary conditions... A. substance A B. substance B C. substance C D. all of the above
A
substance C
25
```
forces of attraction limit the motion of particles most in...
A. a solid
B. a liquid
C. a gas
D. both b and c
```
a solid
26
```
what is the result of a force distributed over an area?
A. temperature
B. volume
C. pressure
D. mass
```
pressure
27
```
collisions of helium atoms with the walls of a closed container cause...
A. condensation
B. gas pressure
C. a decrease in volume
D. and overall loss of energy
```
gas pressure
28
which of the following will cause a decrease in gas pressure in a closed container?
A. increase
B. decrease
C. remain constant
D. cause a decrease in the average kinetic energy of the particles
increase
29
```
which of the following will cause a decrease in as pressure in a closed container?
A. lowering the temperature
B. reducing the volume
C. adding more gas
D. both a and b
```
lowering the temperature
30
```
what type of change occurs when water changes from a solid to a liquid?
A. a phase change
B. a physical change
C. an irreversible change
D. both a and b
```
both a and b
31
```
the phase change that is revise of condensation is...
A. freezing
B. sublimation
C. vaporization
D. melting
```
vaporization
32
```
during a phase change, the temperature of a substance...
A. increases
B. decreases
C. does not change
D. increases or decreases
```
does not change
33
```
if a solid piece of naphthalene is heated and remains at 80 degrees C until it is completely melted, you know that 80 degrees C is the...
A. freezing point of naphthalene
B. melting point of naphthalene
C. boiling point of naphthalene
D. both a and b
```
both a and b
34
```
during which phases change doe the arrangement of water molecules become more orderly?
A. melting
B. freezing
C. boiling
D. condensing
```
freezing
35
```
the phase change in which a substance changes from a liquid to a gas is...
A. deposition
B. sublimation
C. condensation
D. vaporization
```
vaporization
36
```
the phase change in which a substance changes from a solid to a liquid is...
A. freezing
B. melting
C. sublimation
D. condensation
```
melting
37
```
the phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is...
A. sublimation
B. deposition
C. vaporization
D. melting
```
deposition
38
```
the phase change in which a substance changes from a gas directly to a solid is...
A. condensation
B. vaporization
C. deposition
D. sublimation
```
deposition
