1-3 Flashcards
(16 cards)
electrons can hold how many electrons
2 electrons
scientific theory
an explanation for the natural world reached by the scientific method
What did Darwin hypothesize about Galapagos finches?
their beak shapes were different
natural selection
the fittest surviving and passing on their traits
homologous structure
same structure, different function
analogous structure
different structure, same function
homeostasis
constant internal balance
why aren’t viruses living?
they are not cells and do not reproduce
matter is made of
atoms
energy
the capacity to do work
the atomic number of an atom is
the number of protons in the atom
spontaneously decaying nucleus in an atom
radioactive isotope
slows down a sharp change in pH
buffer
what particles are in the nucleus?
protons and neutrons
the same atoms with different numbers of protons
isotopes
the smaller units that make up molecules are called
atoms
