Definitions
Matter is __ and____
Give the three states of matter for full points
Anything that occupies space and has mass.
Solid Liquid Gas
Energy exists in several forms (4)
Chemical
Electrical
Mechanical
Radiant
4 Elements make up 96% of body weight.
Carbon
Hydrogen
Oxygen
Nitrogen
Nucleus is made up of
Protons and Neutrons
Energy is
Mention the two forms for full points.
Kinetic energy (movement)
Potential energy (stored energy)
Radiant or Electromagnetic
Energy that travels in waves: light, for example.
How much do each weigh?
Protons
Neutrons
Electrons
P=1 atomic mass unit
N=1 atomic mass unit
E=0 atomic mass unit
Name the charges for each:
Protons
Neutrons
Electrons
positive
0
negative
Chemical Energy
is stored, in chemical bonds such as the bonds in food molecules.
True or False:
Energy is easily converted from one form to another, although some energy is transferred to the environment in doing so.
True
Atomic number is equal to
Number of protons
Isotopes have same number of __
but different numbers of
Protons
Neutrons
Electrical Energy
movement of charged particles, as ions move across cell membranes.
Energy converions in the body release __
Heat
Mass number of an element is equal to
Protons + Neutrons
Same Atom + Same Atom =
Give example for full credit.
Molecule
O2
N2
Mechanical Energy
is energy directly involved with moving matter (pedaling a bicycle)
True or False:
Elements are unique substances that can be broken down into simpler substances
False, Elements cannot be broken down into simpler substances.
Be ready to draw an Element Symbol You can use the Periodic Table of Elements
Atomic #
Chemical Name
Atomic Mass
Element Symbol
Different Atom + Different Atom =
Give example for full credit.
Compound
H2O
CO2
What are Synthesis reactions ?
Smaller particles are bonded together to form larger, more complex molecules.