Free Practice Test Prep CLEP-Science-and-Mathematics Exam Questions 2025

Stay ahead with 100% Free Biology, Calculus, Chemistry, College Algebra & Mathematics, Precalculus, Natural Sciences CLEP-Science-and-Mathematics Dumps Practice Questions

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Total 500 Questions | Updated On: Jun 06, 2025

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Question 1

How many atoms are in 9g of H2O?

A : 3.01 × 1023

B : 6.02 × 1023

C : 12.04 × 1023

D : 3.01 × 1013N

Answer: A

Question 2

The volume in liters of a 0.2M solution of NaOH needed to neutralize 2 liters of a 0.03M solution of HCl is

A : 0.3 L

B : 0.03 L

C : 0.1 L

D : 0.01 L

E : 0.2 L

Answer: A

Question 3

Mendel studied the following three traits: seed shape, flower position, and stem length.

CLEP-Science-and-Mathematics-page205-image63

If a plant that is heterozygous for seed shape and stem length traits self-fertilizes, the proportion of offspring

that will be homozygous for both traits is

A : 1/16

B : 1/4

C : 1/2

D : 3/4

E : 1/8

Answer: A

Question 4

In an aquatic environment, oxygen concentration depends on chemical and physical factors and is greatly

affected by many biological processes. These is much less dissolved oxygen (DO) in aquatic environments

than in dry air. In most aquatic environments, there are only 5 to 10 mL of dissolved oxygen in a liter of

water. Chemical and physical factors, such as salinity, pH, and especially temperature, can affect the DO

concentration and distribution. An experiment was done to study the effect of different salinity levels on DO

in water of varying temperatures. The results are below. Salinity is expressed in parts per thousand (ppt)

and is the content of dissolved salt in water.

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The results of the experiment suggest that at salinities of greater than 30 ppt, it is likely that

A : dissolved oxygen levels would increase

B : water temperature would increase

C : aquatic organisms would begin to die

D : there would be no change in dissolved oxygen

E : the amount of dissolved oxygen would decrease

Answer: A

Question 5

Which of the following statements correctly ex-plains the flow of energy through a food web?

A : There is more and more energy available as one moves up the food web in order to supply the larger organisms with the energy they need.

B : Organisms of the third trophic level use three times the amount of energy that organisms of the second trophic level use.

C : Radiant energy from the sun is shared equally at all trophic levels of the food web.

D : Energy is recycled through an ecosystem much as carbon and nitrogen are.

E : There is a step-like decline of available energy from one trophic level to the next as organisms useenergy for activities such as growth and reproduction.

Answer: A

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Total 500 Questions | Updated On: Jun 06, 2025

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