# S: Find the density of the object below. The mass An object was dropped into a graduated cylinder that contained 20 mL. Determine the volume of that object.

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S: Find the density of the object below. The mass An object was dropped into a graduated cylinder that contained 20 mL. Determine the volume of that object. The object was placed on a triple beam balance. Image from http://ritter.tea.state.tx.us/Image from http://genchem.rutgers.edu/bal3b2.html Why do Scientists Classify? 5/20/13

The solution … Volume = Volume of water & object – volume of water Volume = 43 mL – 20 mL V = 23 mL M = 373.3 g Density = Mass ÷ Volume D = 373.3 g ÷ 23 mL D = 16.23 g/mL

P: What is classification? Classification is the grouping of things according to characteristics The science of classifying organisms is known as taxonomy.

A: PPT http://www.ric.edu/faculty/ptiskus/six_ kingdoms/

Why do Scientists Classify? Why? –Easier to study –Less confusion –Easier to see connections How? –Physical characteristics –DNA

Classifying Classroom Objects All of the items listed below can be found in most science classrooms. Classify each of the items into 6 groups, giving each group a heading based upon its contents. Lamp Projector

Classifying Classroom Objects All of the items listed below can be found in a Science classroom. Classify each of the items into 6 groups, giving each group a heading based upon its contents. Teacher Paper towels Scotch tape Projector Paper Pencil holder Cabinets Soap Pens Fish Radio Stapler TV Magnets Books Turtles Picture frames Printer Scissors Sink Potted plants Desk Computer Students Windex Stuffed animals Table DVD player Chairs Lamps Group #1:Group #2:Group #3: Group #4:Group #5:Group #6:

Classifying Classroom Objects All of the items listed below can be found in most science classrooms. Classify each of the items into 6 groups, giving each group a heading based upon its contents. Lamp Projector

Classifying Classroom Objects All of the items listed below can be found in a Science classroom. Classify each of the items into 6 groups, giving each group a heading based upon its contents. Teacher Paper towels Scotch tape Projector Paper Pencil holder Cabinets Soap Pens Fish Radio Stapler TV Magnets Books Turtles Picture frames Printer Scissors Sink Potted plants Desk Computer Students Windex Stuffed animals Table DVD player Chairs Lamps Group #1: ElectronicsGroup #2: CleansersGroup #3: Animals Group #4: FurnitureGroup #5: PlantsGroup #6: Supplies Radio TV Printer DVD Player Computer Projector Soap Windex Paper Towels Turtles Fish Teacher Students Chairs Desk Table Cabinets Lamps Picture Frames Stuffed Animals Sink Potted Plants Pencil Holder Stapler Scotch Tape Pens Scissors Books Magnets Paper

Scientists classify, or organize, them into groups based on similar characteristics. Domain Archaea Domain Bacteria Domain Eukarya ArchaebacteriaEubacteria FungiProtista PlantaeAnimalia

The Greek philosopher Aristotle was the first person known to classify living things scientifically. Living things were classified as animals or plants.

Nearly two thousand years later, the Swedish biologist Carolus Linnaeus created a different classification system. He grouped animals and plants based on similarities in their structures. (ex. Backbone or not) Linnaeus’ system has changed over time because we continue to learn about more organisms.

When scientists are classifying organisms they categorize them into groups called taxons. Organisms within a taxonomic group share similar characteristics which allow them to interact within the ecosystem in which they live.

In the system today, groups that have the largest number of different organisms are called domains. There are three domains: 1. Archaea (archaebacteria) –the oldest and simplest organisms on earth 2. Bacteria (eubacteria) - more complex than archaea 3. Eukarya (eukaryotes)- most complex organisms

Domains are broken down into smaller levels called kingdoms. The kingdoms are: Archaea(thermophiles-live in extreme heat) Bacteria (Staphylococcus – responsible for staph infections) Protista(blue-green algae) Plantae (flowering plants) Fungi (mushrooms) Animalia (insects)

C: Identify the six kingdoms by completing the worksheet.

E: Why is the use of scientific names so important in biology/life science?

Identify the two factors that combine to keep the moon and Earth in orbit. EduSmart on Taxonomic Classification 5/21/13 S:

P: Pop Quiz on Living Things

A: Watch EduSmart C: Take Notes

E: List two characteristics that can be used to classify an organism.

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