ICAS Interpreting Scientific Data 5

Question 1

A data table records the speed of a car at 5-second intervals: 0, 10, 20, 30, 40 km/h. What does this data set show about the car's motion?

Accepted Answer

The car is accelerating uniformly

Answer

Equal increases in speed over equal time intervals indicate uniform acceleration.

Question 2

A graph shows two overlapping bell curves. Curve A is centered at 50 and Curve B is centered at 65. What does the difference in centers indicate?

Accepted Answer

Group B has a higher average value than Group A

Answer

The center of a bell curve represents the mean, so Group B's mean (65) is higher than Group A's mean (50).

Question 3

A scientist measures how long it takes for different volumes of water to boil. She tests 100 mL, 200 mL, and 300 mL. What is the controlled variable in this experiment?

Accepted Answer

Temperature of the heat source

Answer

The temperature of the heat source must remain constant (controlled) to ensure a fair test.

Question 4

A results table shows that Plant A grew 8 cm in two weeks with sunlight, while Plant B grew 2 cm with no sunlight. What conclusion is most directly supported?

Accepted Answer

Sunlight promotes faster plant growth

Answer

The only difference between the plants was sunlight exposure, so the difference in growth is attributed to sunlight.

Question 5

A meteorologist plots daily high temperatures for July on a line graph. The graph shows a generally upward trend with a few dips. What does the overall trend suggest?

Accepted Answer

Daily temperatures increased on average throughout July

Answer

An overall upward trend with minor dips indicates that average temperatures increased over the month.

(ICAS) ICAS Practice Test

(ICAS) ICAS Practice Test

ICAS Interpreting Scientific Data 5