GED Science Test #5 3

Question 1

Which of these correctly describes the relationship between wavelength and frequency for electromagnetic waves?

Accepted Answer

As wavelength increases, frequency decreases

Answer

For electromagnetic waves traveling at a constant speed (speed of light), wavelength and frequency are inversely proportional: c = λf. Longer wavelengths mean lower frequencies.

Question 2

In genetics, a trait that is hidden when a dominant trait is present is called:

Accepted Answer

Recessive

Answer

A recessive trait is only expressed when an organism has two copies of the recessive allele (homozygous recessive). When paired with a dominant allele, the dominant trait is expressed.

Question 3

Earth's revolution around the sun takes approximately:

Accepted Answer

365.25 days

Answer

Earth completes one revolution (orbit) around the sun in approximately 365.25 days — one year. The extra 0.25 days accumulate, which is why we have a leap year every 4 years.

Question 4

A scientist graphs her experimental data and the result is a straight line with a positive slope. This indicates:

Accepted Answer

A direct (positive) linear relationship between the variables

Answer

A straight line with a positive slope shows a direct linear relationship — as one variable increases, the other also increases proportionally. Correlation does not prove causation.

Question 5

Which process describes the movement of water molecules from an area of high concentration to an area of low concentration through a semi-permeable membrane?

Accepted Answer

Osmosis

Answer

Osmosis specifically describes the diffusion of water molecules across a semi-permeable membrane. Regular diffusion refers to the movement of any substance from high to low concentration.

GED Practice Test

GED Practice Test

GED Science Test #5 3