Cell Theory 4.1.1

​An Educated Guess

From the Greek:
Hypo = under
Thesis = a proposition
an idea that is put under a test

Hypothesis

​Cyto = meaning cell
Plasm = meaning something molded

A jelly-like substance that molds around the organelles

Cytoplasm

​From Latin
Organ = part of body
Elle = small structure

An organelle is a small structure inside a cell.

​​Organelle

Notebook
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You enter your home to discover a smashed flower pot on the ground. The plant and dirt that were in the pot are now all over the ground.
How do you think this happened?
Start with, "I have a theory that,,"

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​Imagine .....

A proposed explanation to a question.
- Usually formed before testing
- A good hypothesis can be tested
- If, Then, because
Example: If a plant is placed in the dark, then it will wilt and get brown, because it has no light to make food with.

​​Hypothesis

​Is an explanation of how or why something occurs.
- must be tested many times with same results or evidence to support it

Example: Atomic theory

​​Theory

​It describes something that always seems to happen.
Laws describe what happens but not why.
Example: Newton's laws of motion
Force = mass X acceleration
Many times it is an equation

​​Law

Cell theory explains the basic structure of living things.
All living things are composed of cells.

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There are three parts. Let's watch a video on how scientists developed cell theory. Listen for the three parts!

​Cell Theory

1- All living things are composed of cells.

2- Cells are the basic unit of structure and function in living things.

3- All cells come from other cells.

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Cell Theory

This is also a characteristic of life.
Some organisms are unicellular and other multicellular but all made of cells.

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All living things are composed of cells

Cells contain smaller structures called organelles. The organelles perform jobs for the cells, like the organs in our bodies.

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Cells are the basic unit of structure and function.

​All cells come from other cells.

They divide in half to create new cells.

​All cells come from other cells.

Something that is alive or was once alive

Biotic

​Something that was never alive

Abiotic

​Do You REMEMBER??

View under your microscope:

1- Letter "e" slide - slide 90

2- Fibre - slide 73

3- Dog Columnar Epithelium - slide 3

4- Nymphaea, or Aqustio Stem - slide 45

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Notebook
Cell Theory

See you tomorrow!