ACT Science

• decrease, because soil quality is likely to increase.

• decrease, because soil quality is likely to decrease.

• increase, because soil quality is likely to increase.

• increase, because soil quality is likely to decrease.

• Suppose a new crop rotation for Field B included legumes and other deep-rooted and high-residue crops. The SOM of this field will most likely change in which of the following ways? The SOM will:

• Yes; based on SOM, Field B had a soil quality rating of fair and Field A had a soil quality rating of poor.

• Yes; based on SOM, Field B had a soil quality rating of excellent and Field A had a soil quality rating of fair.

• No; based on SOM, Field B had a soil quality rating of poor and Field A had a soil quality rating of fair.

• No; based on SOM, Field B had a soil quality rating of fair and Field A had a soil quality rating of excellent.

• As soil quality improves, the number of earthworms increases. Students hypothesized that more earthworms would be found in Field B. Are the data presented in

  Table 2 consistent with this hypothesis?

• Field A in Year 1

• Field A in Year 3

• Field B in Year 4

• Field B in Year 5

• If 8 tons or fewer in crop yields were considered a failed harvest, in which year and in which field would there have been a failed harvest?

• Figure 1

• Figure 2

• Table 1

• Table 2

• Q: Which set of data best supports the claim that Field A has lower soil quality than Field B?

• Field A Field A

• Field B Field B

• Field A Field B

• Field B Field A

• Based on Figures 1 and 2, consider the average bulk density and the average crop yields for Fields A and B over the study period. Which site had the lower average crop yield, and which site had the higher average bulk density?

  Lower crop yield Higher bulk density

• H₂O was produced.

• H₂ was produced.

• Fe was produced.

• FeO was produced.

• In the experiments shown in

  Table 1 and Figure 1, by measuring the rate at which Fe₂O₃ was formed every day, the experimenters could also measure the rate at which:

• less than 0.56 g

• between 0.59 g and 0.72 g.

• between 1.23 g and 1.84 g.

• greater than 1.84 g.

• Table 1, if the amount of Fe₂O₃ produced on Day 9 had been measured for the salt solution, it would most likely have been:

• 0.08 g

• 0.11 g

• 0.19 g

• 0.30 g

• According to Table 1, what was the amount of Fe₂O₃ produced by the sugar solution from the time the amount was measured on Day 6 until the time the amount was measured on Day 8?

• Day 10

• Day 6

• Day 3

• Day 1

• Consider the amount of Fe₂O₃ produced by the salt solution on Day 2. Based on Table 1 and Figure 1, the water buffered to pH = 10.0 produced approximately the same amount of Fe₂O₃ on which of the following days?

Which liquid had the highest molecular mass?

• Hexane

• Petroleum Ether

• Ethanol

• H20