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WorksheetsAct Science Prep
Total questions: 25
Worksheet time: 25mins
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:
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:
Which set of data best supports the claim that Field A has lower soil quality than Field B?
Figure 1
Figure 2
Table 1
Table 2
Which set of data best supports the claim that Field A has lower soil quality than Field B?
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?
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:
Which day of the week had the lowest temperature?
Monday
Thursday
Tuesday
Wednesday
Based on the information in Table 1 and Figure 1, what is the most likely explanation for the relatively small change in net productivity between 64 successional years and 256 successional years?
The tree successional period is relatively stable in terms of productivity.
Shrubs are continuing to be dominant.
Herbs are continuing to be dominant
The birds prevent net productivity from increasing,
What is the most likely hypothesis explaining succession, based on the data in Table 1 and Figure 1?
As time goes on, a plot of land subjected to slash and burn agriculture produces less and less biomass.
Smaller, less productive plants become dominant once the ecosystem created by larger, more productive plants can support them.
Larger, more productive plants become dominant once the ecosystem created by smaller, less productive plants can support them.
All of the above.
Most of the questions on the Science Section of the ACT are from information stated directly on the page.
True
False
You should use your outside knowledge of Science to answer most of the questions in the Science section of the ACT.
True
False
Which of the following means a unit is multiplied by 1000?
Deci-
Centi-
Milli-
Kilo-
Which of the following terms fits this definition?
Process in which two or more molecules interact with each other and produce something new.
Chemical Reaction
Chemical Equation
Atoms
Molecules
Which of the following terms fits this definition?
Written expression of what happens in a chemical reaction.
Chemical Reaction
Chemical Equation
Atoms
Molecules
Which of the following terms fits this definition?
The smallest possible unit of a chemical element.
Chemical Reaction
Chemical Equation
Atoms
Molecules
Which of the following terms fits this definition? A group of atoms that are stuck together.
Chemical Reaction
Chemical Equation
Atoms
Molecules
Which of the following terms fits this definition?
In a chemical equation, this signifies the chemicals that exist before the reaction occurs.
reagent or reactant
Arrow
Products
Which of the following terms fits this definition?
In a chemical equation, this signifies the chemicals that exist after the reaction occurs.
reagent or reactant
Arrow
Products
Based on the information in Table 1 and Figure 1, what is the most likely explanation for the difference in net productivity between 1 successional year and 4 successional years?
The slash and burn techniques continue.
The bird species become less varied.
The ecosystem becomes more dense and more sophisticated.
The ecosystem becomes less dense and less sophisticated.
Which of the following is a method used to separate a mixture of liquids based on their boiling points?
Distillation
Filtration
Decantation
Evaporation
What is the primary gas found in Earth's atmosphere?
Oxygen
Carbon Dioxide
Nitrogen
Hydrogen
In an experiment, what is the variable that is changed or controlled to test its effects on the dependent variable?
Independent Variable
Dependent Variable
Control Variable
Extraneous Variable
Which of the following is the process by which plants make their own food using sunlight?
Photosynthesis
Respiration
Transpiration
Fermentation
What is the chemical formula for table salt?
NaCl
KCl
CaCO3
MgSO4
Which of the following best describes the function of enzymes in biological reactions?
They slow down reactions
They act as catalysts
They are consumed in reactions
They provide energy for reactions
What is the pH level of a neutral solution at 25°C?
0
7
14
7.5
Which of the following is an example of a renewable energy source?
Coal
Natural Gas
Solar Energy
Nuclear Energy
