Question

quiz: representing data - part 1
part a: multiple choice (questions 1 - 10)

1. which variable is changed (manipulated) on purpose in an experiment?

a) dependent variable b) independent variable c) control variable d) y - axis

1. which variable is measured or observed in an experiment? it is the result of the experiment.

a) independent variable b) dependent variable c) x - axis d) model

1. on a graph, the independent variable is usually placed on the:

a) y - axis b) x - axis c) circle graph d) bar graph

1. on a graph, the dependent variable is usually placed on the:

a) x - axis b) y - axis c) scatter graph d) model

1. which type of graph is best for showing parts of a whole?

a) bar graph b) circle graph c) scatter graph d) line graph

1. which type of graph uses bars to compare amounts?

a) circle graph b) scatter graph c) bar graph

1. which graph shows how two variables are related using points?

a) bar graph b) circle graph c) scatter graph d) pie chart

1. a model is:

a) a type of graph b) a smaller or simpler representation of something
c) always a circle graph d) only used in math

1. if you are testing how sunlight affects plant growth, what is the independent variable?

a) plant height b) amount of sunlight c) soil type d) water amount

1. in the same experiment, what is the dependent variable?

a) amount of sunlight b) plant height c) soil type d) water amount
part b: true or false (questions 11 - 15)

1. the x - axis usually shows the dependent variable. ________
2. a circle graph is also called a pie chart. ________
3. a scatter graph uses dots to show data points. ________
4. a model can help explain something that is too big or too small to see easily. ________
5. the dependent variable is the one you change in an experiment. ________

Explanation:

1. In an experiment, the independent variable is the one that is deliberately changed.
2. The dependent variable is what is measured or observed as a result of the experiment.
3. By convention, the independent variable is placed on the X - axis of a graph.
4. The dependent variable is usually placed on the Y - axis of a graph.
5. A circle graph (or pie chart) is used to show parts of a whole.
6. A bar graph uses bars to compare amounts.
7. A scatter graph shows the relationship between two variables using points.
8. A model is a smaller or simpler representation of something.
9. In the experiment of how sunlight affects plant growth, the amount of sunlight is the independent variable.
10. The plant height is the dependent variable as it depends on the amount of sunlight.
11. The X - axis usually shows the independent variable, not the dependent variable. So this statement is False.
12. A circle graph is indeed also called a pie chart. So this statement is True.
13. A scatter graph uses dots (data points) to represent data. So this statement is True.
14. A model can help explain things that are too big or too small. So this statement is True.
15. The independent variable is the one changed in an experiment, not the dependent variable. So this statement is False.

Answer:

1. B. Independent variable
2. B. Dependent variable
3. B. X - axis
4. B. Y - axis
5. B. Circle graph
6. C. Bar graph
7. C. Scatter graph
8. B. A smaller or simpler representation of something
9. B. Amount of sunlight
10. B. Plant height
11. False
12. True
13. True
14. True
15. False