HiSET Science Practice Test #2 2

Question 1

An atom of carbon-14 has 6 protons and 8 neutrons. What is the mass number of this atom?

Accepted Answer

14

Answer

Mass number = number of protons + number of neutrons = 6 + 8 = 14. This is why this isotope is called carbon-14.

Question 2

Which process causes water to change from a liquid to a gas at temperatures below its boiling point?

Accepted Answer

Evaporation

Answer

Evaporation is the process by which liquid water becomes water vapor (gas) at the surface, even below the boiling point of 100°C, due to some molecules having enough energy to escape.

Question 3

In which type of reproduction does an organism produce offspring that are genetically identical to the parent?

Accepted Answer

Asexual reproduction

Answer

Asexual reproduction produces clones — offspring genetically identical to the single parent — because no fusion of egg and sperm occurs. Examples include budding, binary fission, and vegetative propagation.

Question 4

What happens to a gas inside a sealed container if the temperature is increased (assuming volume stays constant)?

Accepted Answer

The pressure increases

Answer

According to Gay-Lussac's Law, at constant volume, increasing temperature increases pressure. Higher temperature means faster-moving gas molecules that collide with container walls more forcefully.

Question 5

Which of the following is the correct order of taxonomic classification from broadest to most specific?

Accepted Answer

Kingdom, Phylum, Class, Order, Family, Genus, Species

Answer

The standard taxonomy hierarchy from broadest to most specific is: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species. A mnemonic is 'Dear King Philip Came Over For Good Soup.'

HiSET - High School Equivalency Test Practice Test

HiSET - High School Equivalency Test Practice Test

HiSET Science Practice Test #2 2