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WorksheetsUnit 1: Scientific Method & Macromolecules
Total questions: 33
Worksheet time: 17mins
Name
Class
Date
1.
Bob wants to see if red M&Ms melt faster than blue ones. Which hypothesis is he testing?
a)
If M&Ms are heated, the color will change melting time.
b)
If M&Ms are heated, the size will change melting time
c)
If M&Ms are heated, the air temp will change melting time.
d)
If M&Ms are heated, the procedure will change melting time.
2.
Which of the following is NOT an example of a compound?
a)
NaHCO3
b)
HCl
c)
H2O2
d)
H2
3.
What is treated the same , but not exposed to the manipulated variable?
a)
Dependent Variable
b)
Independent Variable
c)
Controlled Variable
d)
None of the above
4.
A farmer wants his chicks to gain weight faster. Which of these questions are most relevant?
a)
What is the average lifespan of a chick?
b)
How many steps a day do chickens take on average?
c)
What type of food causes maximum weight gain?
d)
What breed of chicken weighs more?
5.
A solution is a _________ in a ________.
a)
solvent; solute
b)
solute; solvent
6.
Which step typically comes first in the scientific method?
a)
graph your data
b)
ask a question
c)
analyze your data
d)
make a hypothesis
7.
What do macromolecules all have in common?
a)
None of them contain phosphates.
b)
They all contain C, H O and N.
c)
They are all polymers made of monomers
d)
None of the above.
8.
A scientist found the pH of an unknown substance to be 2.5. This indicates:
a)
The solution is acidic.
b)
The solution is alkaline.
c)
The solution is neutral.
d)
The solution is basic.
9.
Which unit is part of the SI system?
a)
mile
b)
cup
c)
degree Fahrenheit
d)
cm
10.
. If people are given various amounts of vitamins, then those with more vitamins will live longer
a)
IV = how long the person lives
b)
IV= the amount of vitamin given
c)
IV= age of the person
d)
IV= type of vitamin
11.
Which is an inorganic compound?
a)
BaF2
b)
C4H8O
c)
C32H39NO4
d)
C5H8
12.
In an ionic bond, electrons are ______.
a)
transferred
b)
shared
c)
held
d)
eliminated
13.
Electrons shared between atoms are the result of _______ bonds.
a)
hydrogen
b)
covalent
c)
ionic
d)
no such bond
14.
Lori is studying the water level changes over 10 yrs. What's the best way to display her data?
a)
pie chart
b)
bar graph
c)
table
d)
line graph
15.
The pH of a solution becomes more resistant to change if :
a)
a buffer is added
b)
the temperature is lowered
c)
salt is added
d)
the temperature is raised
16.
There are 20 students in Science Club. 5 of these are seniors. What percentage are seniors?
a)
25%
b)
50%
50%
50%
c)
75%
d)
100%
17.
Which of the following units is NOT used in the SI system?
a)
kg
b)
mL
c)
in.
d)
km
18.
Pure water is a/an ______.
a)
acid
b)
base
c)
neutral
19.
Which of the following cannot be measured using a pH scale?
a)
strength of an acid or base
b)
concentration of hydroxide ions
c)
acidity of a solution
d)
concentration of solute in a solution
20.
Which of the following is NOT correct?
a)
The IV is changed by the DV.
b)
The DV is effected by the IV.
c)
The IV is manipulated so changes in the DV can be recorded.
d)
The IV is changed by the experimenter.
21.
What tool can most accurately determine the volume of a sample of water?
a)
graduated cylinder
b)
thermometer
c)
spring scale
d)
balance
22.
A building block of DNA.
a)
amino acid
b)
nucleotide
c)
monosaccharide
d)
fatty acid
23.
Fats, oils, and waxes are examples of
a)
carbohydrates
b)
lipids
c)
nucleic acids
d)
proteins
24.
Which of the following is an example of a protein?
a)
DNA
b)
enzyme
c)
saturated fat
d)
sugar
25.
A student is curious about the relationship of sleep to test scores. What should he do first?
a)
Go without sleep for 48 hrs before a test.
b)
Make a hypothesis about the effect of sleep on test scores.
c)
Take a survey of his classmates' test scores.
d)
Time how long he sleeps each night for two weeks.
26.
Which of the following comparisons between macromolecules is false?
a)
Carbohydrates and lipids both store energy.
b)
Proteins and nucleic acids both store information.
c)
Proteins and carbs both have roles in structural support.
d)
Nucleic acids and amino acids both contain monosaccharides.
27.
Which of these is an example of a quantitativeobservation?
a)
Bob's style of shirt
b)
Jenna's breed of dog
c)
The names of people in your biology class.
d)
Sue's body temperature
28.
What is the best statement concerning cohesion of water molecules?
a)
Water freezes into ice.
b)
Water molecules adhere to the glass window.
c)
Water molecules hydrogen bond to each other.
d)
Water evaporates into vapor.
29.
Which of the following is the DV of our Lifesaver lab?
a)
dissolving time
b)
Lifesaver color
c)
amount of saliva
d)
temperature of the classroom
30.
Which of the following is NOT due to water's surface tension?
a)
Rain falling in drops.
b)
Spilt water forming a puddle.
c)
Water bugs walking on water
d)
Icebergs floating in the ocean.
31.
Which of the following is found in the nucleus of an atom?
a)
protons
b)
electrons
c)
neutrons
d)
protons and neutrons
32.
Which is NOT a characteristic of a catalyst?
a)
A catalyst speeds up reactions.
b)
A catalyst speeds up reactions. Enzymes are catalysts.
c)
A catalyst gets used up in a reaction.
d)
A catalyst is reusable.
33.
_________ bonds form between water molecules.
a)
Ionic
b)
Hydrogen
c)
Covalent
d)
No
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