Transcript File

Science TAKS
Review
Viruses and Bacteria
• Viruses are not alive, Bacteria are alive
Viruses (not alive)
• Viruses – cause disease
– ANTIBIOTICS DO NOT CURE THEM
– ONLY IMMUNE SYSTEM
• AIDS, the common cold, small pox,
influenza, and warts
Bacteria (alive)
• Harmful - get antibiotics
– Strep Throat
– Staph Infections
• Helpful 
– decomposers – septic tanks, rotting
meat
– mutualism : intestines
– cheese, yogurt
Evolution
• Mutations
• Reproductions
Natural Selection- environment decides
who lives… only tall trees- giraffes
happy
Who would survive?
Symbiosis
• Symbiosis – relationship between two
organisms
• Mutualism – both species benefit
• Predation – one
species (predator)
benefits, other (prey)
is eaten
• Parasitism – one species benefits,
the other is harmed
• Competition – two species want same thing
• Commensalism –
one species benefits,
one is not affected
• Remora fish eat
shark’s scraps; shark
is not affected
Food chain & food web
– who eats what
Arrows show
flow of energy
Trophic levels
• Producer - green
plant - photosynthesis
• Consumer – Must
eat
• Decomposer
breaks down dead
and waste
Types of matter
Elements
Fe
H
O
Au
Compounds
FeCl3
H2O
CO2
Density D = M
V
More dense
liquids sink!
Water density
= 1g/ml
Viscosity
Resistance to flow
more viscous– the slower the flow
Buoyancy
Chemical Change
•
•
•
•
Change of temperature
Production of light
Production of a gas
New thing formed
Physical change
• Change in size and shape
• Making a solution
• Change in state
Conservation of Mass
6CO2 + 6H20 --> C6H12O6 +6O2
Matter is never created or destroyed
Solutions
• Solute- salt
• Solvent – water
• Soluble- salt can be
dissolved
• Force - a push or a pull on an object
F = ma
Force is measured in NEWTONS (N)
• Work - force causes an object to move W=Fd
Work -JOULES (J)
• Power – How fast
you get work done
• P=W/t
• Power - WATTS (W)
Kinetic Energy - motion
Potential Energy - energy stored
Click on
the slide!
Energy
• Conduction - heat transfer from one object to
another by direct contact …solids
• Convection - heat carried from one place
to another in a liquid or gas as molecules
move in currents caused by density
differences…liquids & gases
• Radiation - the transfer of heat energy
through empty space
• (heat from sun)….infrared
Soooooo……..Heat moves by-
Waves
• Transverse wave moves up and down as
the energy travels right to
left. Perpendicular
• example: light, ocean
• Longitudinal wave –
moves back and forth as
the energy travels right to
left. Parallel
• Example: sound
REFLECTION
Refraction
Electricity- 10th
• Series Circuit - a
circuit in which the
current has only
one path
• Parallel Circuit - a
circuit in which the
current can take
more than one path
READ!!!
READ!!!
READ!!!
Remember
• Use your Equation Sheet
• Use your Calculator
• Use your Periodic Table
• YOU need at least 41 correct
to pass….. DO YOU HAVE
THAT?