Download scientific method

WEEK 3 CCA REVIEW – Test on Wednesday, Sept.12
MATCHING
1. Inference _____
a. small unit that can join together with other small units to form
polymers
2. observation _____
b. compound made up of carbon, hydrogen, and oxygen atoms;
major source of energy for the human body
3. hypothesis _____
c.
4. independent variable _____
d. macromolecule made mainly from carbon and hydrogen
atoms; includes fats, oils, and waxes
5. dependent variable _____
e. Monomer of proteins
6. organic compounds _____
f.
7. monomer _____
g. single sugar molecule. Monomer of carbohydrates
8. polymer _____
h. macromolecule that contains carbon, hydrogen, oxygen, and
nitrogen; needed by the body for growth and repair and to
make up enzymes
9. carbohydrate _____
i.
nucleic acid that contains the sugar deoxyribose
10. monosaccharide _____
j.
element or compound produced by a chemical reaction
11. polysaccharide _____
k.
use of one or more of the senses—sight, hearing, touch,
smell, and sometimes taste—to gather information
12. lipid _____
l.
monomer of nucleic acids
13. fatty acid _____
m. factor in an experiment that a scientist wants to observe,
which may change in response to the manipulated variable
14. nucleotide _____
n. process that changes one set of chemicals into another set of
chemicals
15. nucleic acid _____
o. reactant of an enzyme-catalyzed reaction
16. deoxyribonucleic acid (DNA) ____
p. protein that acts as a biological catalyst
17. protein _____
q. logical interpretation based on prior knowledge and
experience
18. amino acid _____
r.
large compound formed from combinations of many
monomers
19. chemical reaction _____
s.
An idea you can test
20. Reactant _____
t.
Building block of lipids
21. Product ______
u. substance that speeds up the rate of a chemical reaction
22. catalyst _____
v.
23. enzyme _____
w. macromolecule containing hydrogen, oxygen, nitrogen,
carbon, and phosphorus
24. substrate _____
x.
energy needed to get a reaction started
25. activation energy _____
y.
The compounds containing carbon that are typically found in
living systems.
large macromolecule formed from monosaccharides
factor in an experiment that a scientist purposely changes;
also known as manipulated variable
element or compound that enters into a chemical reaction
BIOMOLECULES (Chapter 2 – Section 3)
 Read Chapter 2 – Section 3
 Fill out this table. (You are not done studying until you can reproduce this table from memory)
Organic
Macromolecule
Monomer Unit
(Building Block)
Polymer
(Yes or No)
Function
Examples
Carbohydrates
(polysaccharides)
Lipids
Proteins
Nucleic Acids
ENZYMES (Chapter 2 – Section 4)

Read Chapter 2 – Section 4

You MUST understand enzymes very well to be successful on the test. Read the chapter at least 2 times
and study all of the figures closely.
1. What is an enzyme? What is a substrate?
2. What does an enzyme do, and how does it work?
3. Why is an enzyme’s shape important?
4. How can heat and pH affect an enzymes shape and function?
5. Find an example of an enzyme in your book or on the internet. Describe what this enzyme does.
6. Draw an enzyme and its substrate. Label the enzyme, substrate, and the enzyme’s active site.
SAFETY

Study all the safety rules
True or False
1. _____ Broken glass should be thrown away in the trash can.
2. _____ Students should never return equipment to its proper place.
3. _____ Students can improvise in lab and design their own experiments
4. _____ A metal calorimeter is heated with a Bunsen burner. As soon as you turn off the flame, it is ok to pick
up the calorimeter with your hands.
5. _____ You should wash your hands before you leave the lab.
6. _____ The fire blanket should be used when you are cold.
SCIENTIFIC METHOD
Read the paragraphs below and answer the questions 1-7.
Joe baked a cake for his mother's birthday. When he removed the cake from the oven, Joe noticed that the cake
had not risen. Joe guessed that the baking powder he had used was too old. He designed the following
experiment to test his idea.
Joe prepared two cakes – one using the same ingredients as his first cake and one using fresh baking powder.
After preheating oven to 350F, he placed both cakes in the oven for 30 minutes. After 30 minutes, he removed
both cakes and noticed that neither one had risen. He decided that the baking powder wasn’t the cause of his
problem.
For 1-3, Match the statements to the appropriate letter below: Each may be used once, more than once or not at
all.
A. hypothesis.
B. conclusion.
C. observation
D. problem
1. _____ The baking Powder wasn’t the cause of his problem.
2. _____ Joe noticed neither cake had risen.
3. _____ The baking powder was too old
For 4-7, Match the statements to the appropriate letter below: Each may be used once, more than once, or not at
all.
A. Independent variable
4.
5.
6.
7.
B. Dependent variable
_____ Age of Baking Powder
_____ Cake with same ingredients as original cake
_____ Amount each cake rose
_____ Ingredients other than baking powder
C. Constant(s)
D. Control(s)