ACT Extrapolation and Estimation

Extrapolation and Estimation

There will be questions on the ACT Science section the require you to extend the trend of a figure or table beyond its given boundaries. For line graphs, extend the line with your pencil to ensure the best estimation. For table or bar graphs, look for the best answer choice that fits your drawn estimation. The majority of these questions have only one answer choice that fits the correct range.

Multiple Choice

According to Figure 1, at 90°C, the mass of NaNO₃ that is soluble in 100mL of H₂O is

• less than 40 kg

• between 40 kg and 50 kg

• 50 kg and 60kg

• greater than 60kg

Multiple Choice

According to Figure 1, at -10°C, the mass of NaCl that is soluble in 100mL of H₂O is

• less than 0 kg

• between 0 kg and 30 kg

• 30 kg and 60kg

• greater than 60kg

Multiple Choice

According to Figure 1, at 100°C, the mass of HCl that is soluble in 100mL of H₂O is

• less than 0 kg

• between 0 kg and 30 kg

• between 30 kg and 60kg

• greater than 60kg

Multiple Choice

Suppose Trial 3 had been repeated with a block mass of 10 kg. According to Table 1, the block speed measured would most likely have been:

• less than 1.7 m/s

• between 1.7 m/s and 2.2 m/s

• between 2.2 m/s and 2.4 m/s

• greater than 2.4 m/s.

Multiple Choice

Suppose Trial 4 had been repeated with an incline elevation of 35°. According to Table 1, the block speed measured would most likely have been:

• less than 3.7 m/s

• between 3.7 m/s and 4.4 m/s

• between 4.4 m/s and 4.8 m/s

• greater than 4.8 m/s.

Data Bridge

The data bridge skill links multiple figures or tables to arrive at the correct answer. Here is how you can identify that you will be using this skill and what to do after you've recognized the question type.

Based on Figures 1 and 2, when the resistance of Device 2 is 3 Ω, the current, I, is approximately:

A. 3 mA. B. 4 mA. C. 5 mA. D. 6 mA.

Multiple Choice

Based on Figures 1 and 2, when the current of Device 1 is 1 mA, the resistance is approximately:

• 2 $$\Omega$$

• 3 $$\Omega$$

• 4 $$\Omega$$

• 5 $$\Omega$$

Multiple Choice

Which variable represents the "bridge"?

• Rock Cluster

• Av percentage

• Power

• None of the Above

Multiple Choice

Based on Tables 1 and 2, a power of 300 W is most likely associated with which rock cluster?

• Rock Cluster I

• Rock Cluster II

• Rock Cluster III

• Rock Cluster IV

Multiple Choice

Based on Tables 1 and 2, which rock cluster most likely has the greatest power?

• Rock Cluster I

• Rock Cluster II

• Rock Cluster III

• Rock Cluster IV

Multiple Choice

Based on Tables 1 and 2, which of the following values is closets to the power of Rock cluster II?

• Rock Cluster I

• Rock Cluster II

• Rock Cluster III

• Rock Cluster IV