Download science ch1 lesson 1

Chapter 1
Lesson 1
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Cells are the building blocks of life
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Cell: is the smallest unit of a living thing
that can perform all life processes
Some living things are made up of 1 cell (Single
Celled Organism)
Plants, animals and humans are made up of many
cells (multi- cellular organism)
Organism: Any living thing
We look at cells using a microscope
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All cells have :
nucleus
cell membrane
cytoplasm
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Nucleus: is the control center
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(“Boss” of the cell)
Instructions for the cells activities are held
here
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Just like a recipe book
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Cell Membrane: is the cells outer border
Controls what goes into and out of the cell
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(acts like a “screen”)
Separates the cell from its environment
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Cytoplasm: jell like liquid (looks like jello)
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Plant cells only have:
Chloroplast
Cell wall
Large Vacuole
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Chloroplast: is a special part of a plant
cell that traps the Sun’s energy.
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The Sun’s energy is used to make the plants
food
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The cell wall is outside the cell membrane
It helps support and protect the plant cell
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Stores water for the plant cell
Water is needed to make the “plant
food”
Animal Cell:
Round
Plant Cell:
Rectangular