10 free Iowa Assessments practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
Iowa Assessments Practice Test 12Tutor mode
Question 1 of 10
Science
Ravi studied brine shrimp, tiny animals that live in salty lakes. He set up five containers. Each held 1 liter of water at 25°C and 100 brine shrimp eggs. He added a different amount of salt to each container. After 2 days, he counted how many eggs had hatched in each container.
Brine Shrimp Eggs Hatched After 2 Days
Salt (grams per liter)
Eggs hatched (out of 100)
0
2
15
40
30
78
45
65
60
20
Which question was Ravi's investigation designed to answer?