SAT Practice55af0cb2-1f16-4184-a04f-f39d41958743
Practice one SAT question at a time
Questions come from the Bluebook question bank.
- For each data category, the following bars are shown:
- grass cover
- bare soil
- forest cover
- All values are approximate.
- The data for the 3 categories are as follows:
- 1987:
- grass cover: 57,000 square meters
- bare soil: 65,000 square meters
- forest cover: 75,000 square meters
- 1993:
- grass cover: 95,000 square meters
- bare soil: 16,000 square meters
- forest cover: 57,500 square meters
- 2006:
- grass cover: 130,000 square meters
- bare soil: 35,000 square meters
- forest cover: 45,000 square meters
- 1987:
The Jordanelle Dam was built on the Provo River in Utah in 1992. Earth scientist Adriana E. Martinez and colleagues tracked changes to the environment on the banks of the river downstream of the dam, including how much grass and forest cover were present. They concluded that the dam changed the flow of the river in ways that benefited grass plants but didn’t benefit trees.
Which choice best describes data from the graph that support Martinez and colleagues’ conclusion?