Solved Solutions 2026 Updated.
biology - Answer study of life
3 domains or groups - Answer eukarya, bacteria, archae
4 kingdoms in Eukarya - Answer animalia, plantae, fungi, protista
properties of life - Answer order, homeostasis, growth and development, energy, respond to
environment, reproduce, evolve
How to define something as living - Answer complex and made of chemicals, needs to eat food
common themes in biology - Answer scope of life, organisms exchange matter and energy,
cells are basic unit of life, continuous life based on DNA, diverse life forms, evolution
scientific method - Answer used to explain or answer questions about data, observe, question,
hypothesize, predict, experiment, analyze
hypothesis - Answer tentative explanation for an observation
components of hypothesis - Answer support or reject hypothesis with data, not all can be
investigated scientifically, must be testable
what is a theory in science - Answer much broader scope than hypothesis, become widely
accepted through evidence
what are limits of science - Answer science is not the only way to understand nature, cannot
address every question
what is an element - Answer 92 naturally occurring elements, substance cannot be broken
down into other substances
atom - Answer smallest unit of an element that has all of its properties
atom composed of - Answer protons, neutrons, electrons
, atomic number = - Answer proton number
mass number (atomic weight) - Answer protons + neutrons
neutral atom: - Answer elections=protons
ion - Answer element that has gained or lost an electron
isotope - Answer element containing different numbers of neutrons
how are isotopes and fossils connected - Answer half life and radioactivity living through
fossils
energy - Answer capacity to do work, make a change in matter; potential energy is stored in
bonds, kinetic is doing work
neutral atom - Answer atom with no charge, number of electrons = number of protons
trace element - Answer required in very small amounts but cannot live without them
radioactive isotope - Answer nucleus decays, giving off particles and energy; exposure can
harm living things
electrons in energy shells - Answer 1st shell: 2 electrons
2nd shell: 8 electrons
3rd shell: 8 electrons
types of chemical bonds - Answer covalent (single or double): sharing of electrons - strongest
bond; ionic: attraction between + and - ions - moderate; hydrogen: unequal sharing of electrons
- weakest
beginning material in chemical reactions - Answer reactants
ending material in chemical reaction - Answer products