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Scientific Method Unit Test Review WS Answers
Scientific Method Unit Test Review
Question #1: 8 parts of the scientific method process in order:
1. ask a question or identify the scientific problem
2. make observations/conduct research
3. write a hypothesis4. write a procedure5. carry out the
experiment6. collect and organize
data7. analyze data8. draw conclusions
Scientific Method Unit Test Review
2. Use your own words to define the following words:
variable – any part of an experiment that changes
control – an experimental group that is used as a standard to compare results to
independent variable – a variable that you change ON PURPOSE
dependent variable – a variable that changes that you MEASURE
hypothesis - constant – a variable that
does NOT change/MUST stay the same/NOT allowed to change
Scientific Method Unit Test Review
3. On which axis on a graph do you put the dependent variable?
Y-axis
Scientific Method Unit Test Review
4. At the end of an experiment what does a scientist form?
Conclusions
Scientific Method Unit Test Review
5. Which part of the scientific method process is most likely to follow hypothesizing?
Write a procedure
Scientific Method Unit Test Review
6. What is the role of a control in an experiment?Serves as a standard so you can compare your
results to it
Scientific Method Unit Test Review
7. What is the name of the recorded measurements taken during an experiment?
data
Scientific Method Unit Test Review
8. If the amount of lighting is increased across a fish tank, then more brine shrimp will be found in the area where the light is the brightest. The dependent variable is the…
the number of brine shrimp
Scientific Method Unit Test Review
9. If mice are given food pellets high in salt content, then the mice should have an increase in urine output. Identify at least two constants in this experiment.
•mice of same gender, age, and species.• same amount of food pellets given to all mice
Scientific Method Unit Test Review
10. On which axis of a graph do you put the independent variable?
X axis
Scientific Method Unit Test Review
11. On which axis of a graph do you put the dependent variable?
Y axis
Scientific Method Unit Test Review
12. What is name of the question to be solved in an experiment?
scientific problem
Scientific Method Unit Test Review
13. What is the name of a statement that can be tested?
Hypothesis
Scientific Method Unit Test Review
14. What is the “factor” a scientist changes during a controlled experiment? In other words what is the variable called that he is testing?
independent variable
Scientific Method Unit Test Review
15. What is the format of a hypothesis?If D.V. is related to I.V., then specific prediction as the
I.V. increases/decreases the DV increases/decreases.
Scientific Method Unit Test Review
16. What are the characteristics of a hypothesis? In other words, what must a hypothesis include?
If, is related to, then
Scientific Method Unit Test Review
17. Which variable do you change on purpose?independent variable
Scientific Method Unit Test Review
18. Which variable do you measure?dependent variable
Scientific Method Unit Test Review
19. In a data table, which column (left or right) do you record the dependent variable?
right column
Scientific Method Unit Test Review
20. In a data table, which column (left or right) do you record the independent variable?
left column
Scientific Method Unit Test Review
21. The act of drawing a solution from the information found in an experiment is making a __________________.
conclusion
Scientific Method Unit Test Review
22. In an experiment, the variable that changes as a result of changes in the manipulated variable is the…
dependent variable
Scientific Method Unit Test Review
23. In an experiment, a scientist is studying how long it takes parachutes of different sizes to fall to the ground. What is the independent variable?
size of parachute
Scientific Method Unit Test Review
24. You want to know if the temperature of water affects how quickly a cube of sugar will dissolve. What would be the dependent variable?
time it takes sugar cube to dissolve
Scientific Method Unit Test Review
25. On which axis on a graph do you put the independent variable?
X axis
Scientific Method Unit Test Review
26. What is the most appropriate problem for this experiment?
(a) How do plants and animals get along in pond water?
(b) What type of gasses do different organisms give off as a waste product?
(c) Which pond water changes color? (d) What causes the water to turn color?
Scientific Method Unit Test Review27. Write a Hypothesis for this experiment.If the color change of Bromthymol blue is related to the
presence of carbon dioxide, then as the amount of carbon dioxide increases the bromthymol blue becomes more green.
Scientific Method Unit Test Review28. Highlight the sentences in the experiment which
describe the procedure.Four Flasks were filled with pond water. Five drops of Bromthymol blue were added to each flask. Bromthymol blue turns green in the presence of carbon dioxide. A snail was placed in flask 2. A piece of Elodea, a plant, was placed in flask 3. Both a snail and a piece of Elodea were placed in flask 4. All four flasks were sealed with paraffin wax and placed in the light for 2 days. At the end of two days, the water in flask 2 was green. The water in flask 3 was blue. The water in flask 4 was blue at the top and green at the bottom.
Scientific Method Unit Test Review28. Highlight the sentences in the experiment which
describe the procedure.Four Flasks were filled with pond water. Five drops of Bromthymol blue were added to each flask. Bromthymol blue turns green in the presence of carbon dioxide. A snail was placed in flask 2. A piece of Elodea, a plant, was placed in flask 3. Both a snail and a piece of Elodea were placed in flask 4. All four flasks were sealed with paraffin wax and placed in the light for 2 days. At the end of two days, the water in flask 2 was green. The water in flask 3 was blue. The water in flask 4 was blue at the top and green at the bottom.
Scientific Method Unit Test Review29. Underline the sentences in the experiment that contain
observations.Four Flasks were filled with pond water. Five drops of Bromthymol blue were added to each flask. Bromthymol blue turns green in the presence of carbon dioxide. A snail was placed in flask 2. A piece of Elodea, a plant, was placed in flask 3. Both a snail and a piece of Elodea were placed in flask 4. All four flasks were sealed with paraffin wax and placed in the light for 2 days. At the end of two days, the water in flask 2 was green. The water in flask 3 was blue. The water in flask 4 was blue at the top and green at the bottom.
Scientific Method Unit Test Review29. Underline the sentences in the experiment that contain
observations.Four Flasks were filled with pond water. Five drops of Bromthymol blue were added to each flask. Bromthymol blue turns green in the presence of carbon dioxide. A snail was placed in flask 2. A piece of Elodea, a plant, was placed in flask 3. Both a snail and a piece of Elodea were placed in flask 4. All four flasks were sealed with paraffin wax and placed in the light for 2 days. At the end of two days, the water in flask 2 was green. The water in flask 3 was blue. The water in flask 4 was blue at the top and green at the bottom.
Scientific Method Unit Test Review
30. What purpose does Flask 1 have in the experiment?
Control
Scientific Method Unit Test Review
31. What is the independent variable in this experiment?
What is placed in each flask: the snail, the Elodea plant, the snail and the Elodea plant
Scientific Method Unit Test Review
32. What is the dependent variable in this experiment?
The color change of the pond water
Scientific Method Unit Test Review33. Name 6 constants in this experiment.1. Size of flask2. Kind of flask (same shape)3. Pond water taken from the same pond at the same
time4. same brand of Bromthymol blue5. same type of paraffin wax6. same gender/species/size of snail7. same size piece of Elodea plant.
Scientific Method Unit Test Review
34. Write a conclusion for this experiment. Make sure your conclusion contains everything a conclusion is supposed to have.
Scientific Method Unit Test ReviewI put pond water in four flasks, and added 5 drops of
Bromthymol blue. Then I put a snail, a piece of Elodea, and a snail and a piece of Elodea in 3 of the flasks. I sealed all 4 flasks with wax. My hypothesis was if the color change of Bromthymol blue is related to the presence of carbon dioxide, then as the amount of carbon dioxide increases the bromthymol blue becomes more green. My hypothesis was supported.
Scientific Method Unit Test ReviewIf I repeated this experiment, I would use a fish and a
different kind of water plant. I learned that even animals that live in water “exhale” oxygen and plants that live in water “exhale” carbon dioxide, just like land animals and plants.