CEM 141- exam 1 Questions with complete solution 2026/2027
1. lecture 1
2. scientific theory 1) ask questions
2) design experiments
3) gather and analyze data and evidence
4) make claims
5) develop models and explanations
3. scientific doing experiments
questions can be making observations
answered by taking measurements
***all must be done in a replicable way
4. claim the target of your explanation
5. evidence the data or scientific principle you are using to support your claim
6. reasoning the connection between your claim and evidence
7. explain why coffee Cottee cools down when milk is added
cools down when
milk is added
claim
8. explain why coffee because the temperature of the milky cottee is intermediate between
the
cools down when milk milk and cottee.
is added
evidence
9. explain why coffee
,cools down when milk
, CEM 141- exam 1
is added The molecules at higher temperatures collide with molecules at
lower tem-peratures and transfer energy. Hot molecules slow down
reasonin
and cold molecules tend to speed up.
g The best available explanation of the existing
10. scientific theory evidence/data/observations. Explains how and/or why.
ex-plained
Makes testable predictions.
Is falsifiable (ie can be proven false by experiments and
data). May change over time as new evidence
becomes available.
11. law vs theory A law describes the phenomenon.
(A law tells you what.)
A theory explains the
phenomenon. (A theory tells
you why.)
12. lecture 2
13. why leaves are Claim: "A plant's leaves are green in the summer because..."
green in the
summer
Evidence: "...they contain chlorophyll."
(this is evidence because it is the data she uses to support her claim)
Reasoning: "Chlorophyll is a natural pigment that absorbs all
wavelengths in the visible spectrum except green. The reflected
green light is the color our eyes see."
(this is reasoning because it explains how having chlorophyll
, makes the leaves green)
1. lecture 1
2. scientific theory 1) ask questions
2) design experiments
3) gather and analyze data and evidence
4) make claims
5) develop models and explanations
3. scientific doing experiments
questions can be making observations
answered by taking measurements
***all must be done in a replicable way
4. claim the target of your explanation
5. evidence the data or scientific principle you are using to support your claim
6. reasoning the connection between your claim and evidence
7. explain why coffee Cottee cools down when milk is added
cools down when
milk is added
claim
8. explain why coffee because the temperature of the milky cottee is intermediate between
the
cools down when milk milk and cottee.
is added
evidence
9. explain why coffee
,cools down when milk
, CEM 141- exam 1
is added The molecules at higher temperatures collide with molecules at
lower tem-peratures and transfer energy. Hot molecules slow down
reasonin
and cold molecules tend to speed up.
g The best available explanation of the existing
10. scientific theory evidence/data/observations. Explains how and/or why.
ex-plained
Makes testable predictions.
Is falsifiable (ie can be proven false by experiments and
data). May change over time as new evidence
becomes available.
11. law vs theory A law describes the phenomenon.
(A law tells you what.)
A theory explains the
phenomenon. (A theory tells
you why.)
12. lecture 2
13. why leaves are Claim: "A plant's leaves are green in the summer because..."
green in the
summer
Evidence: "...they contain chlorophyll."
(this is evidence because it is the data she uses to support her claim)
Reasoning: "Chlorophyll is a natural pigment that absorbs all
wavelengths in the visible spectrum except green. The reflected
green light is the color our eyes see."
(this is reasoning because it explains how having chlorophyll
, makes the leaves green)
