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Life Science Big Idea

Classifying Organisms Lesson 1: How Do Scientists Classify Organisms? 5 th Grade Science Mr. Hughes. Life Science Big Idea. Students will understand how scientists classify living things into six kingdoms based on internal and external structures. Life Science Concept Map.

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Life Science Big Idea

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  1. Classifying OrganismsLesson 1:How Do Scientists Classify Organisms?5th Grade ScienceMr. Hughes

  2. Life Science Big Idea • Students will understand how scientists classify living things into six kingdoms based on internal and external structures.

  3. Life Science Concept Map All living things are made of cells. Multicellular organisms have many types of cells. All organisms can be classified into one of six kingdoms: archaebacteria, eubacteria protists, fungi, plants, and animals. Scientists classify organisms according to how closely they are related.

  4. Kingdoms of Living Things • Biologists use a scientific system that organizes living things into groups. • Scientists use 6 kingdoms: archaebacteria, eubacteria, protists, fungi,plants, & animals. • Organisms are classified according to internal and external characteristics. • Scientists use dichotomous keys to help identify organisms.

  5. ClassifyingMost Living Things Single-celled? YES NO Nucleus in cell? Makes its own food? NO YES YES NO Bacteria Protists Eats food? NO Plants YES Animal Fungi

  6. Bacteria • Bacteria are among the smallest of organisms and are the most numerous. • Bacteria can only be seen with a microscope. • Bacteria are single-celled and do not have a nucleus. • Bacteria are divided into 2 kingdoms: archaebacteria and eubacteria. -Cocci: round shape; join together to form chains -Bacilli: rod-shaped; found in soil and water -Spirochetes: look like worms; wriggle when seen under a microscope • Archaebacteria are the oldest known organisms.

  7. Protists • Most protists are single-celled; all protist cells have a nucleus. • Some protists share characteristics with fungi, plants, or animals. • Animal-like protists are call protozoa: -amoebas: uses false foot to move -can’t make own food, so take from surroundings

  8. Protists • Plant-like protists use energy from sun to create own food -algae: adds oxygen to air http://simply-science-nbep.blogspot.com/2011/06/algae-vs-plants.html - to read how algae and plants differ. • Fungi-like protists have harmful effects on plants and animals. -slime mold: ooze slowly over dead trees and piles of fallen leaves. • Parameciummoves slowly using tiny, hair-like structures called cilia that cover most of its body -cilia work like oars to move paramecium forward and backwards

  9. Fungi • Fungi can be single-celled or multicellular organisms; all fungal cells have a nucleus. • Fungi cell walls are made of the same substance that forms insect shells. • Fungi absorb nutrients from their environment by decomposing other organisms. • Fungi grow fast and reproduce through spores. • Mushrooms are examples of fungi.

  10. Pictures of Protists Multicellular- Protist Seaweed Algae- Protist Amoeba- Protist Slime Mold - Protist

  11. Mushroom Life Cycle spores mycelium cap stalk

  12. Mushroom Life Cycle(continued) • A mushroom with a stalk and cap is the above-ground part of certain fungi species. • Spores are released from the mushroom cap. • Spores grow on a surface and form the mycelium. • The mycelium produces mature mushrooms.

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