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15 Cards in this Set

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  • Back
Matter
is anything that occupies space and mass
mass
the amount of matter in an object
energy*
the capacity to do work
*potential energy
stored energy
*kinetic energy
associated with matter in motion
chemical reactions
Invovlve energy changes
1.chemical energy
1.a form of potential energy
stored within the chemical bonds
2.chemical energy
2.is stored in the food we eat the bonds are broken down and eventually converted into kinetic enrgy which is
3.Chemical energy
3.used by the body:
*ATPproduction
*Muscle action
*Heat production
Energy
can be neither created nor destroyed.It can only be converted from one to the other
The law of conserving energy
Energy can be neither created nor destroyed. It can only be converted from one form to another
Physiology
Most of it is driven by the conversion of potential energy into kinetic energy and back
Structure of the atom:
Atoms-
Subatomic particles:
Nucleus~protons(p+) and neutrons(n0 neutral)
electrons(e-)surrounding the nucleus in 1 or more electron shells
Valence.Form a negative charged cloud.
shell 1=2 electrons max
2=8e-
3=8e-
Number of electrons=
number of protons(neutral atom)
atomic number=number of protons which defines the atom.example,carbon=6
Atomic Mass=
number of protons + neutrons
example,carbon =12