1. Unit 1 Test Prep
Complete the following questions to test your knowledge in preparation for your upcoming test!
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2. What is an explanation of an observation ?
Hypothesis
Inference
Qualitative Observation

3. Incorrect
Remember: A Hypothesis is an “educated guess” that you make about what will happen in your experiment.
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4. Correct By definition:
An Inference is an explanation of an observation.
Example: The lady is holding her head, she must have a headache.
Why it is an inference: we are explaining why she is holding her head.

5. Incorrect
Remember: A qualitative observation is an observation that describes or notes characteristics. Example: The dog is grey. Why it is qualitative: Grey describes the color of the dog.
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6. What are quantitative observations?
Observations made using a measuring device
Observations made using descriptions or characteristics
Observations made that are always precise and accurate

7. Correct By definition:
A quantitative observation is one that uses a measuring device and/or includes a quantity (#).
Example: The class has 25 students.
Why it is quantitative: We have a quantity of 25
Example 2: The room is 10 feet long.
Why it is quantitative: there is a measure of 10 feet.

8. Incorrect
Remember: A qualitative observation is an observation that describes or notes characteristics. Example: The dog is grey. Why it is qualitative: Grey describes the color of the dog.
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9. Incorrect
Remember: A quantitative observation could be inaccurate. For example: someone could miscount, someone could read the measuring device wrong.
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10. What is a variable? A factor or condition that stays the same
An aspect of an experiment that the experimenter changes
A factor or condition that can change

11. Incorrect Consider Your Answer Choice:
A factor or condition that stays the same
The reason this is wrong is because a variable can change!
Controlled variables, a specific type of variable, are the variables that remain the same.
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12. Incorrect
Consider Your Answer Choice: An aspect of an experiment that the experimenter changes The reason this is wrong is because a variable doesn’t have to change, nor does it need to be changed by the experimenter. Remember: responding or dependent variables change as a result of the experiment.
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13. Correct By definition:
A variable is a factor or condition that can change
Manipulated/Independent: Experimenter changes
Responding/Dependent: changes based on the experiment
Controlled: Stay the same

14. Which of the following examples is a qualitative observation?
The large dog has black and brown spots over its body.
The large dog has twenty-seven brown and black spots over its body.
The dog has a spot around his eye that is five inches in diameter.

15. Correct
Remember: A qualitative observation is an observation that describes or notes characteristics. Your Answer: The large dog has black and brown spots over its body Why it is qualitative: It describes the dog as large and with black and brown spots.

16. Incorrect Consider Your Answer Choice:
The large dog has twenty-seven brown and black spots over its body.
The reason this is wrong is because there is a quantity (27) in the statement.
If there is a quantity, a number or measurement, the observation is quantitative.
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17. Incorrect Consider Your Answer Choice:
The dog has a spot around his eye that is five inches in diameter.
The reason this is wrong is because there is a measurement (five inches) in the statement.
If there is a quantity, a number or measurement, the observation is quantitative.
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18. When Setting up a graph, the manipulated variable is located where?
X-axis
Y-axis

19. Correct
Remember The manipulated variable always goes on the x-axis! The manipulated variable is also known as the independent variable. This is the variable that the experimenter is changing.

20. Incorrect
Remember The y-axis is where the responding/dependent variable is placed. The responding variable/dependent variable is what you are measuring as a result of what you have changed.
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21. Operational Definition
The words “The hypothesis was refuted / The hypothesis was supported” would be found in which part of the scientific method?
Operational Definition
Conclusion
Research Question

22. Correct
Remember The conclusion comes after the experiment and your analyzing of your data. It should express whether your hypothesis was supported or refuted. It is written in the form “As the…”

23. Incorrect
By Definition The operational definition tells other scientists what tools were used to perform the experiment. It includes the tool and the unit in which you are measuring, if possible.
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24. Incorrect
By definition The research question is what we are trying to answer by our experiment. It is written in the form: How does the manipulated variable affect the responding variable.
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25. What is the relationship between the variables?
Direct Linear
Inverse Linear

26. Incorrect
As the mass increases, the acceleration decreases. Therefore, it is an inverse relationship.
For the answer to be direct linear, both mass and acceleration need to increase. See Below
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27. Correct
As the mass increases, the acceleration decreases. Therefore, it is an inverse relationship.

28. What is the slope of the following graph?
kg/m/s2
m/s2/kg
m/s2

29. Correct
m/s2/kg
The equation for slope is y2-y1 / x2-x1; since acceleration is on the y-axis, it’s unit label (m/s2) goes over the x-axis label (kg)

30. Incorrect
Kg/m/s2
The equation for slope is y2-y1 / x2-x1; since acceleration is on the y-axis, it’s unit label (m/s2) goes over the x-axis label (kg)
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31. Incorrect
m/s2
The equation for slope is y2-y1 / x2-x1; since acceleration is on the y-axis, it’s unit label (m/s2) goes over the x-axis label (kg). None of the units cancel out!
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32. Good Luck on your test!
Don’t Forget to Study!!!