Isotopes vary in the number of ___________.
__________ is the number of protons in an atom
__________ is the sum of protons and neutrons in an atom
What are neutrons, an atomic number, and a mass number?
100
The two compounds that are essential to living things
What are water and carbon compounds?
200
This is essential for the continuation of a species.
What is reproduction?
200
__A__ is an explanation that ties together many hypotheses and observations.
__B__ is a summary of many experimental results and observations. It tells you how things work, not why.
What is a theory and a law?
200
__________ involves the transfer of one or more electrons from a metal onto a non-metal.
__________ forms when two atoms share one or more pairs of electrons.
What is an ionic bond and a covalent bond?
200
Organic compounds composed of C, H, and O in a ratio of 1:2:1
What is carbohydrate?
300
This is required in a process called metabolism.
What is energy?
300
An experiment that tests only one factor at a time and consists of a control group and one or more experimental groups.
What is a controlled experiment?
300
Mixtures in which particles do not settle out over time.
Particles in this are intermediate in size between particles in a solution and those in a suspension.
What are colloids?
300
A type of organic compounds that store energy and that has more C-H bonds than C-O bonds. Its monomers are called _________.
What is lipid and fatty acid?
400
This occurs through cell division and cell enlargement.
What is growth?
400
A - the manipulated variable
B - the responding variable
What is an independent variable and a dependent variable?
400
An aqueous solution that contains more OH- than H3O+
What is a base or basic solution?
400
The 4 groups of an amino acid molecule
What is an amino group, a carboxyl group, a central carbon atom, and an R group?
500
This refers to the maintenance of a stable level of internal conditions.
What is homeostasis?
500
6 steps of the scientific methods
What is
ask a question
form a hypothesis
test the hypothesis
analyze the results
draw conclusions
communicate results?
500
The amount of energy required for the reaction to begin
What is activation energy?
500
A - stores and transfers information that is essential for the manufacturing of proteins
B - stores information essential for almost all cell activities