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Biology Midterm 1
What are the two types of data?
______ solutions have a pH below 7.
Biology Midterm 1
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1
______ solutions have a pH below 7.
basic
acidic
buffering
neutral
2
What are the two types of data?
quantitative & qualitative
numbers & graphs
sight & numbers
measurement & time
3
______ is a substance that accepts hydrogen ions.
A neutralizer
An acid
A buffer
A base
4
Which is NOT a property of an acid?
feels slippery
some react strongly with metal
corrosive
Tastes sour
5
The uneven distribution of charges across a molecule making one end positive & the other negative is called ______
polarity
non polar
saturated
capillary action
6
A _____ is two or more elements or compounds physically mixed together.
mixture
solvent
solute
suspension
7
______ solutions have a pH above 7.
basic
acidic
neutral
buffering
8
What is NOT an example of quantitative data?
your level of pain
Taking a temperature
Timing a runner
Measuring a jump
9
A reaction between an acid and a base is called ______.
equilibrium
neutralization
buffers
homeostasis
10
Things that do not like water are called _________.
hydrophobic
oil
hydrophilic
repellants
11
What are the 6 steps of the Scientific Method in order?
question, hypothesis, data, experiment, conclusion, research
Question, research, hypothesis, experiment, data, conclusion
Hypothesis, research, question, conclusion, data, experiment
research, question, experiment, hypothesis, conclusion, data
12
______ is data based on measurement or numbers.
inference data
qualitative data
observational data
quantitative data
13
A(n) _________ group is the group in an experiment that receives the variable being tested.
independent
control
dependent
experimental
14
What is the “cause” in the experiment?
inference
dependent variable
independent variable
observation
15
A pH scale runs from ______
1-100
0-14
0-25
1-10
16
_______ is the attraction of molecules of a different substance.
adhesion
basic
cohesion
acidic
17
In lab, you should _______ a chemical instead of directly smelling it.
taste
guess
waft
ask what it is
18
What is the “effect” in the experiment?
independent variable
inference
dependent variable
observation
19
A ________ is a mixture with the components evenly distributed throughout.
solution
solute
solvent
suspension
20
The amount of energy needed to raise the temperature of a substance is its ________.
heat limit
melting point
boiling point
heat capacity
21
What are the two types of observations?
sight & hearing
intuitive & inference
quantitative & qualitative
measurement & time
22
T or F- Always return unused chemicals to the original containers.
True. It helps with the cleanup
False. There could be contaminants in the chemicals.
True. Chemicals are expensive
False. Just pour it down the drain
23
_______ has a normal pH of 7.4
pure water
human blood
vinegar
milk
24
What is a curved surface in a graduated cylinder called?
capillary action
surface tension
concaved
meniscus
25
What is the biggest error in scientific experimentation?
judgement calls
accidents
human error
not researching
26
A compound that releases H+ ions in a solution is a(n) ________.
solution
gas
acid
base
27
What is NOT an example of qualitative data?
your level of pain
Explaining a color
Determining the feel of a rock
Taking a temperature
28
What is an educated guess?
observation
conclusion
inference
hypothesis
29
_________ is the use of prior knowledge to make a statement.
control
inference
observation
cause
30
Both adhesion and cohesion allow water to move in one continuous column in an upward movement called ____
meniscus
capillary action
polarity
surface tension
31
A(n) ________ is any compound that releases OH- ions in a solution
base
acid
gas
solution
32
Which is NOT a property of a base?
feels slippery
tastes sour
corrosive
can conduct electricity
33
______ is data based on descriptions.
inference data
quantitative data
qualitative data
observational data
34
Which is NOT safety equipment?
goggles
lab apron
gloves
face mask
35
_____ is the group that does not receive the new treatment being studied.
experimental
control
dependent
independent
36
Observation is based on _______
our 5 senses
prior knowledge
what we see only
inferences
37
The substance doing the dissolving is the _______.
solute
solvent
suspension
solution
38
_______ is the attraction of molecules of the same substance.
basic
cohesion
adhesion
acidic
39
If one solution has a pH of 1 and a second solution has a pH of 2, the first solution is _______.
100 times more acidic
10 times more acidic
2 times more acidic
5 times more acidic
40
T or F - You should never clean up broken glass.
False. You will get in trouble for breaking things.
True. You should act like it never happened
True. You should have Ms. Lucas clean it up to avoid injury
False. You should pick up all the pieces you see.
41
What is considered neutral on a pH scale?
milk
vinegar
human blood
pure water
42
________ is the substance being dissolved.
solute
solution
suspension
solvent
43
What is considered neutral on a pH scale?
baking soda
milk
human blood
pure water
44
A compound that prevents sudden changes in pH is a(n) _______.
acid
buffer
base
gas
45
Which is NOT an example of an acid?
lemon juice
oranges
bleach
vinegar
46
Which is NOT an example of a base?
baking soda
chalk
bleach
vinegar
47
________ is a mixture of water and nondissolved material.
solute
solvent
suspension
solution
48
The more H + ions, the more ________ the solution.
it buffers
it neutralizes
basic
acidic
49
Water is called the
________
because it can dissolve more substances than any other known substance.
universal solute
universal mix
universal solution
universal solvent
50
_____
is a force that acts on the particles at the surface of a liquid.
capillary action
polarity
surface tension
meniscus
