Fall 24 Final Exam Set 1

Front

What is the charge of a neutral atom?

Back

A neutral atom has no overall charge, meaning it has an equal number of protons (positive charge) and electrons (negative charge).

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons, and it holds most of the atom's mass.

Front

What is an independent variable in an experiment?

Back

The independent variable is the one factor that is deliberately changed or manipulated by the scientist to observe its effect.

Front

What distinguishes prokaryotes from eukaryotes?

Back

Prokaryotes are single-celled organisms without a nucleus or membrane-bound organelles, while eukaryotes have a nucleus and organelles.

Front

How do you calculate the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number (number of protons) from the mass number (total number of protons and neutrons).

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or observed in response to changes in the independent variable.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is a control group in an experiment?

Back

The control group is the group in an experiment that does not receive the treatment and is used as a benchmark to measure how the other tested subjects do.

Front

What is DNA?

Back

DNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions for life and is found in all living organisms.