Cells, Cell Theory, Uni and Multicellular Organisms Grade 8 .pptx

Year 8 Biology Cells - Systems Miss Baker’s Year 8 Science LI: We will be learning about cells Success Criteria Surface I can recall MRSGREN I can define a cell Deep I can justify whether something will have cells I can explain a model of cells How do you know if something is alive? Think – Pair - S...

Year 8 Biology Cells - Systems Miss Baker’s Year 8 Science LI: We will be learning about cells Success Criteria Surface I can recall MRSGREN I can define a cell Deep I can justify whether something will have cells I can explain a model of cells How do you know if something is alive? Think – Pair - Share Is it alive? Year 7 MRS GREN Movement Reproduction Respiration Sensitivity Excretion Nutrition Growth Year 8 All living things are made up of cells Which of these are made of cells? Skin Rock Banana Flower Cells A cell is the basic building block of all living things. Most cells are too small to be seen with the naked eye. You can only see them with the help of a microscope. So they are called microscopic. Recall: Which of the following are made up of cells? A. Flowers B. Insects C. Sand D. Dogs E. Rocks SC: I can justify whether something will have cells Apply The butterfly sculpture is made of Lego blocks. Explain how it can be used as a model to represent how living things are made up of cells. SC: I can explain a model of cells LI: We will be learning about cells Success Criteria Surface I can define a cell I can state the three points of cell theory Deep I can explain how cell theory developed I can make connections between technology and knowledge Cell Theory There are three main principles that determine what a cell is. These principles make up the cell theory: Cells make up all living things. Cells are the basic building blocks of all living things. All new cells are produced from existing cells. Checking for Understanding Select the best definition of a cell A. A cell is the smallest thing in the world B. Cells make up the human body C. A cell is the basic building block of all living things D. A cell is difficult to see, even with microscopes SC: I can define a cell Checking for Understanding Identify which description of a cell is incorrect. A. Cells are non-living things B. A cell is the smallest structural part of an organism C. Most cells cannot be seen with the naked eye D. All living things must contain at least one cell SC: I can define a cell History of Cell Theory LI: We will be learning about types of organisms Success Criteria Surface Deep & Transfer I can classify organisms as I can define unicellular unicellular or multicellular and justify and multicellular my choices I can research single-celled organisms Cells Some living things are only made up of one cell, like bacteria. They are called unicellular organisms One Unicellular Cell Some examples of unicellular organisms include: Amoeba, protozoa, unicellular algae, unicellular fungi, unicellular yeasts, paramecia and bacteria. SC: I can define unicellular and multicellular Unicellular Organisms Cells Other living things can be made up of many cells, like us! They are called multicellular organisms. Many Multicellular Cell Some examples of multicellular organisms include: humans, birds, fish, trees and spiders. SC: I can define unicellular and multicellular Multicellular Organisms There are advantages to being multicellular rather than unicellular. These include allowing: The organism to be larger. Cell differentiation (having different types of cells with different functions). The organism to be more complex. One cell or many? An amoeba A water flea Record your observations of each organism in a table like this Amoeba Observations Water Flea Recall: State which type of organism a tree is A. A cell B. Multicellular C. Unicellular D. Non-cellular SC: I can classify organisms as unicellular and multicellular Recall: Which of the following are examples of multicellular organsims? A. Amoeba B. Virus C. Elephant D. Protozoa E. Clover SC: I can classify organisms as unicellular and multicellular Recall: Which of the following is not an example of a multicellular organsim? A. Amoeba B. Tadpole C. Cat D. Bamboo E. Worms SC: I can classify organisms as unicellular and multicellular Recall all the advantages of an organism being multicellular. A. Multicellular organisms reproduce faster than unicellular organisms B. Multicellular organisms can be more complex than unicellular organisms C. Being multicellular allows organisms to grow larger than unicellular organisms D. Multicellular organisms have differentiated cells Classify these organisms as unicellular or multicellular Unicellular Multicellular SC: I can classify organisms as unicellular and multicellular Think – Pair – Share Questions The water flea is best seen under a microscope. Explain why this doesn't mean it must be unicellular. SC: I can classify organisms as unicellular or multicellular and justify my choices Think – Pair – Share Questions In one teaspoonful of healthy soil, there can be billions of unicellular organisms. That's comparable to the number of people on the entire planet! Explain why the soil doesn't qualify as an organism, despite containing billions of living cells. SC: I can classify organisms as unicellular or multicellular and justify my choices SC: I can research single-celled Research Task organisms Find Step 2 The name of the organism Step 1 Research a single-celled organism on the internet. Step 3 A photograph of the organism Step 4 A description of where the organism is found Step 5 A description of the role this organism plays in nature