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27 Cards in this Set

  • Front
  • Back
the study of life
biology
highly organized, tiny structures with membranes
cell
the process by which organisms make more of their own kind from one generation to the next
reproduction
is the sum of all of the chemical reactions carried out in an organism
metabolism
maintenance of stable internal conditions
homeostasis
sets of inherited instructions for making proteins
gene
passing of traits from a parent to an offspring
heredity
change in DNA of a gene
mutation
change in inherited traits of species over time
evolution
group of genetically similar organisms that produce fertile offspring
species
organisms with favorable genes are more likely to survive and reproduce
natural selection
science that studies interaction of living things with each other and nonliving
ecology
Who was Charles Darwin?
nineteenth century British naturalist who came up with natural selection
What is Metabolism? What is Homeostasis?
Metabolism is the sum of all chemical reactions in an organism. Homeostasis is the maintenance of internal conditions.
What is the order of scientific invetigation?
Observation
asking questions
hypotheses
prediction
experiments
conclusions
What is a contol group? What is an experimental group?
A control group is a group that receives no experimental treatment. An experimental group is a group that receives some type of experimental treatment.
What are dependent variables?
What are independent variables?
Dependent variables are measured (number of salamanders that hatched from the eggs). The independent variable is the factor that is varied (acid).
Where does a dependent variable lay on a graph?
Where does an independent variable lay on a graph?
Independent variable is on X axis and dependent variable is on Y axis.
- smallest unit of matter that cannot be broken down by chemical means
Atom
Number of protons in an atom, represents number of electrons as well. Officially number of protons.
Atomic Number
All atoms are most stable when their outer electron levels are full
Octet rule
substance made of only one kind of atom, pure substance. (gold)
element
substance made of joined atoms of two or more different elements (salt)
compound
- group of atoms held together by a covalent bond (Carbon dioxide)
molecule
attraction between substances of same kind
cohesion
attraction of different substances (Polar)
adhesion
results from when one part of the molecule keeps shared electrons longer than the other part of the molecule. (water) .
polarity