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Scientific
Method
Variables
Cell Structure
and Functions
Cellular
Reproduction
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Qualitative observation.
What type of observation is the following:
This plant has grown and now has green leaves
with yellow spots. There are also brown
thorns on the stem.
Row 1, Col 1
What is the independent variable
in the following experiment
Strawberry plant clones are given different
amounts of water for a 3-week period. First strawberry
plant receives 400 millilitres (ml) a day.
The second strawberry plant receives 200ml a day.
The third strawberry plant receives 100ml a day.
The fourth strawberry plant does not receive any
extra water; this plant only receives natural ways
of receiving water. The height of the strawberry
plants is recorded daily.
1,2
Cell membrane.
What structure keeps the cell’s organelles protected
and helps give the cell shape?
1,3
4.
How many cells are there
at the end of meiosis?
1,4
Draw a conclusion.
What is the last step
in the Scientific Method?
2,1
The amount of homework she completed.
What is the dependent variable in this situation:
Sara Lilia pulled out four different CD’s to find out
which type helped her to finish her homework the
fastest. The first CD was rock, the second reggaeton,
the third classical, and the fourth was cumbia.
At the end of the experiment, she found that she was
able to concentrate the most with the classical music,
then the rock, and the cumbia. She noticed that she
did not concentrate much at all with the reggaeton and
felt like dancing and singing along instead of working.
2,2
To collect and store light energy for the plant.
What is the function of
chloroplasts in plant cells?
2,3
Budding, fragmentation, parthenogenesis.
What are the types of asexual
reproduction we have learned
about this term?
Select one and describe.
2,4
To have more data to average and have more accurate
results.
Why do you perform multiple
trials in an experiment?
3,1
Some part of the experiment that stays the same for the
duration of the experiment.
What is the constant variable
in an experiment?
3,2
The movement of water across a semi-permeable
membrane.
What is osmosis?
3,3
46. All body cells have 46 chromosomes.
How many chromosomes can you
expect to find in a heart cell?
3,4
An observation is made by using your senses in an
experiment and an inference is what you think is
happening (explains the observation).
What is the difference between
an observation and an inference?
4,1
Plant growth, or plant height.
In a lab where you would
test plant growth in different
amounts of sunlight, what is
the dependent variable?
4,2
In a hypertonic solution water moves OUT of the cell
and into the surrounding liquid (water).
What happens to cells in a
hypertonic solution?
4,3
Interphase.
The cells spends most of its life in
which stage of the cell cycle?
4,4
D, F, B, E, C, A
List the following steps
of the scientific method in order:
A. Draw a conclusion
B. Carry out an experiment
C. Analysis of data
D. Identify the problem
E. Observe and record results
F. Form a hypothesis
5,1
To show what would happen in an experiment when
there is no independent variable.
Why do experiments
have a control?
5,2
Nucleus, cell membrane, cytoplasm, mitochondria,
vacuoles, lysosomes, golgi bodies, ribosomes,
endoplasmic reticulum.
What structures are found in
both plant and animal cells?
5,3
Metaphase.
In what stage of mitosis do the
chromosomes line up across
the center of the cell?
5,4