9. Periodic Table
● There are 90 naturally
occuring elements with
25 man made elements.
● Some are gases, liquids
and most solids
● Elements are made up of
atoms
10. Parts of an atom
● NUCLEUS: center of the atom
contains protons and neutrons
● Proton: Positively charged in Nucleus
● Neutron: Neutral Particle in Nucleus
● Electron: Negatively charged, moving in
shells outside the nucleus
13. Atomic Number
● You read this off the periodic table
● Tells how many Protons and
Electrons (not together)
● MASS NUMBER HOW MANY
PROTONS AND NEUTRONS
TOGETHER
● NEUTRONS=THE ATOMIC
NUMBER-THE MASS NUMBER
14. ELECTRON
● ELECTRONS ARE IN SHELLS
AROUND THE NUCLEUS
● 1ST SHELL HAS 2 ELECTRONS
● 2ND SHELL HAS 8 ELECTRONS
● 3RD SHELL HAS 18 ELECTRONS
● 4TH SHELL HAS 32 ELECTRONS
16. Mass
● The amount of
matter in any
object
● Mass shows a
resistance to
being moved
17. Gravity
● The force between objects of mass
● The bigger the mass, more force of gravity
● All matter is attracted to other matter
● To reduce the force of gravity between
objects, spread the distance between the
two
●
18. Gravity on Different Planets
● Suppose you weigh 100 pounds here on
Earth. list.
● Earth - 100 lbs
● Moon - 17 lbs
● Mercury - 38 lbs
● Jupiter - 236 lbs
● Pluto - 7 lbs
● sun - 2407 lbs
19. Newton’s Gravity
● Newton also found that gravity
Increases with bigger objects
● Different plants have different
Masses
Galileo two object drop
20. Weight
● This is the pull of
gravity against
your Mass.
● Remember that
mass is matter
and gravity is the
pull against the
matter
21. Mass x gravity = weight
● We measure mass using grams (g)
● Weight, we use Newton (N)
The units for Newtons is kg x mass/seconds
22. Potential Energy
●Potential energy is energy that is stored
in an object. Mainly GRAVITY
Rivers and lakes with dams
●Kinetic energy is energy of motion.
23. Newton laws of Motion
● 1st law: objects will stay at rest or in
motion unless acted upon (Inertia)
