Unit 1 Test Review Warm up

What is a valid observation ("I See") statement for this graph? Select all that apply.

• The 1 hour line is the lowest.

• The 9 hour line is the highest.

• All plants grow best with 9 hours of sunlight.

• The highest point on the 6 hour line is at 90.

• Tomato plants don't get very tall without much sunlight.

If the "I See" statement is "The 3 hour line is the higher and the 1 hour line is lower", what is a valid "It means" statement for this graph?

• No plants grow when they only have 1 hour of sunlight a day.

• Tomato plants grow better when they have 3 hours of sunlight a day than when they only have 1 hour of sunlight a day.

• All plants grow best when exposed to 3 hours of sunlight a day.

• Sunlight has no impact on plant growth.

If the "I See" statement is, "The 9 hour line is the highest", what is a valid "It means" statement for this graph? Choose all that apply.

• Sunlight is needed for plant growth.

• All plants grow best when given maximum hours of sunlight.

• Tomato plants grew the most when exposed to sunlight for 9 hours a day.

• As the daily amount of sunlight increased, the height of the tomato plants increased.

Write an "I See" statement for this graph.

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If the "I See" statement is "The line peaks at 30 on the x-axis", write an "It means" statement for that observation.

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Compare the increase in carbon dioxide between 1960 - 1970, and the increase in carbon dioxide between 2000 - 2010.

• The increase in carbon dioxide from 1960-1970 was about 20 ppm, while from 2000-2010 it was about 15 ppm.
• The increase in carbon dioxide from 1960-1970 was a greater increase than it was from 2000-2010.

• The increase in carbon dioxide happened at a slower rate between 2000 - 2010, than it did between 1960 - 1970.

• The increase in carbon dioxide happened at a faster rate between 2000 - 2010, than it did between 1960 - 1970.

Scientists measured the rate of photosynthesis for a single oak tree over the period of 5 days. They concluded that not much oxygen was produced on day 4, because it was raining and there was a lot of cloud cover.

What is an alternative conclusion supported by the data?

• It was not raining on day 4.

• The high temperature on day 4 reduced oxygen production

• There was not enough oxygen left in the plant on day 4.

• The decreased sunlight on day 4 reduced oxygen productoin

What is the independent variable and the dependent variable in this data?

• Independent variable: temperature; Dependent variable: average number of new leaves.

• Independent variable: average number of new leaves; Dependent variable: temperature.

• Independent variable: temperature; Dependent variable: number of daylight hours.

• Independent variable: average number of new leaves; Dependent variable: number of daylight hours.

What is the relationship between the temperature and the average number of new leaves?

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What can you infer about the temperature for E.coli bacterial growth?

• E. coli does not grow well at low and high temperatures.
• E coli will continue to grow at very high temperatures.
• E.coli grows best at very low temperatures
• E.coli grows best at very high temperatures.