For each graph that is shown you will be expected to identify the following: 1.Independent Variable 2.Dependent Variable 3.Appropriate scientific question

Graph 1. A container of seeds (all of the same type) are exposed to a plant growth chemical. The seeds are divided into groups. Each group receives a different concentration of the chemical. Scientists measure the percent of seeds that sprout in each group.

Seed Germination (%) Concentration of the Hormone Gibberellic Acid (ppm) 1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 2. A “fit” person’s heart rate is monitored as he/she exercises for a period of time. An “unfit” person’s heart rate is also monitored as he/she exercises for a period of time.

1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 3. The average annual amount spent by US families is represented. The amount spent is broken down into nine household spending categories, such as “Food”.

Annual Family Expenditures ($) Spending Category 1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 4. The density of the atmosphere is recorded by a robot as in goes up the side of a mountain (increasing altitude.)

Density of the Atmosphere: % of density at sea level 1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 5. The amount of caffeine is recorded for a variety of different beverages such as Coca-Cola.

Caffeine Concentration (mg) Beverage Type 1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 6. The running speeds of 28 different animals are compared.

1.Independent Variable 2.Dependent Variable 3.Appropriate scientific question 4.Summary of the trend (pattern of data 5. Control Group??

Graph 7. The boiling point of water is monitored by a robot as elevation increases.

1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?

Graph 8. How plants (exposed to two different concentrations of carbon dioxide) change their rates of photosynthesis as leaf temperatures increase.

1.Independent Variable? 2.Dependent Variable? 3.Appropriate scientific question?