The Scientific Method
The process of trying to understand the world around us.
Science
what is biology?
the study of living things and their environment
what are the four major elements in a human body?
oxygen, hydrogen, nitrogen, and carbon
monomers are the subunits of polymers
the cellular process that turns sunlight into cellular energy
photosynthesis
Scientific Inquiries begin by __________
making an observation
what is a species?
a closely related group of individuals that can produce fertile offspring
What is a covalent bond?
when atoms share electrons in a bond
a carbohydrates monomer is called ________.
a monosaccharide
the usable form of cellular energy
ATP
What is a hypothesis?
an educated guess that can be tested
what is homeostasis?
maintaining constant internal conditions
What properties in water are due to the hydrogen bonds?
high specific heat, cohesion, and adhesion
amino acids
the cell membrane is primarily made of ____
phospholipids
the observed/measurable outcomes of a scientific experiment
dependent variable
what are the three subatomic particles of an atom?
protons, neutrons, and electrons
the molecule that is dissolved in a solution is called ______
a solute
A _______ fatty acid is a lipid in which every carbon is attached with as many hydrogen atoms as it can
saturated
these cells
•Do not have a nucleus or other membrane-bound organelles
•The DNA is suspended in the cytoplasm
•Typically, single-celled organisms
Prokaryotic cells
How is a scientific theory different than a hypothesis?
a theory is supported by experimental evidence while a hypothesis is an educated guess
what is an ion?
an atom that has gained or lost an electron
a solution is more acidic if it has a lot of ______ ions
H+
a _______ chemical reaction releases more heat than it absorbs (often seen when polymers are broken)
exothermic
what three things does the cell theory state?
1) all cells are made from other living cells
2) all organisms are made from cells
3) cells are the most basic unit of life