pH and Water
is a substance with the pH level of 5 an acid or a base?
acid
a testable prediction
a hypothesis
4 major groups of biomolecules
carbohydrates, lipids, proteins, and nucleic acids
basic units of life
cells
defines the identity of an element
protons
the that holds the hydrogen and oxygen atoms together
a covalent bond
the variable you change in the experiment on purpose.
which macromolecule has enzymes?
proteins
absorbs energy during a reaction
endothermic
stabilizes the nucleus of an atom
neutrons
electrical charge difference between areas of molecule
polarity
variable measured in an experiment
dependent variable
nucleic acids
emits energy during a reaction
exothermic
creates chemical bonds in atom
electrons
is a substance with a pH of a level of 7 an acid or base?
neutral
kept under normal conditions during experiment
control group
is made of and is sometimes called fatty acids
lipids
energy required to start a chemical reaction
Activation Energy
anything that has mass and takes up space
matter
when water molecules are pulled inwards
surface tension
is the scientific method a rule/law?
no
an element found in all living things
carbon
sum of all the reactions within an organism
metabolism
The number of protons decides its...
atomic number