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 Helpful  Strep Throat Staph Infections Helpful  decomposers – septic tanks, rotting meat mutualism : intestines cheese, yogurt

Evolution CHANGE Mutations Reproductions Natural Selection- environment decides who lives… only tall trees- giraffes happy CHANGE

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 10% 90% Producer - green plant - photosynthesis Consumer – Must eat Decomposer breaks down dead and waste 10% 90%

Types of matter Elements Fe H O Au Compounds FeCl3 H2O CO2

Density D = M V More dense liquids sink! Water density = 1g/ml

more viscous– the slower the flow 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!!!

Remember Use your Equation Sheet Use your Calculator Use your Periodic Table YOU need at least 41 correct to pass….. DO YOU HAVE THAT?