Scientific Method
The variable that is intentionally changed by the scientist
What is the independent variable?
A bond formed when electrons are transferred from one atom to another
What is an ionic bond?
The smaller units that make up biological macromolecules
What are subunits (monomers)?
Cells that contain a nucleus and membrane-bound organelles
What are eukaryotic cells?
A lizard basks in the sun to raise its body temperature after a cold night. This behavior demonstrates which characteristic of life?
What is homeostasis?
A testable prediction that answers a scientific question
What is a hypothesis?
The number of protons in an atom
What is the atomic number?
Sugars and starches used as a main energy source
What are carbohydrates?
The structure that controls what enters and leaves the cell
What is the cell membrane?
Water is an excellent solvent because it is a ___ molecule.
What is a polar molecule?
Variables that are kept the same to ensure a fair test
What are control variables?
A molecule with an unequal sharing of electrons is ___, while one with equal sharing is ___
What are polar and nonpolar molecules?
Molecules that store long-term energy and make up cell membranes
What are lipids?
The organelle responsible for producing energy (ATP)
What is the mitochondrion?
This biological macromolecule is composed of nucleotides and stores genetic information.
What are nucleic acids?
The variable that is measured as a result of the change
What is the dependent variable?
A solution with a pH less than 7 is described as ___
What is acidic?
Molecules made of amino acids that act as enzymes and structural components
What are proteins?
What is the atomic number?
What are ribosomes?
Substances that release hydrogen ions (H⁺) in solution are called ___
What are acids?
Carbon, hydrogen, oxygen, and nitrogen are the primary elements that make up this class of macromolecules.
What are proteins?
The structure that contains genetic material in eukaryotic cells
What is the nucleus?