Cell Theory 4.1.1

Draw

What did you do over break?

Cell Theory

Multiple Choice

What does not belong?

Which one is NOT a characteristic of a living things?

1- It uses energy.

2- It responds to the environment.

3- It grows. 4- It adapts

• 5- It is composed of cells.

• It has steady internal conditions.

• It is moving.

• It reproduces.

​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
Page

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,,"

​

​Imagine .....

Multiple Select

Based on what you heard in the video, what are the necessary parts of a scientific theory?

• repeated testing yielding the same results

• represented with mathematical equations

• may be an opinion or guess

• supported by facts and evidence

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

Match

Match the following based on our discussion. You may use your notes!

• hypothesis

• law

• theory

If milk is left on counter, then it will

KE = 1/2mv²

matter is composed of atoms

• If milk is left on counter, then it will

• KE = 1/2mv²

• matter is composed of atoms

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

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

​Cell Theory

Draw

Can you name the three parts to 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.

​

Cell Theory

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

​

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.

​

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.

Hotspot

Which statement provides evidence to support cell theory?

You may choose more than one!

Theories are scientific statements based on evidence from lots of testing.
Every living thing is made of cells which are the basic building blocks of life.
Every cell comes from a pre-existing cell.

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

Match

Match the following CER.

• Claim

• Evidence

• Reasoning

all living things are composed of cells

letter had no cells but dog did

Only biotic slides had cells.

• all living things are composed of cells

• letter had no cells but dog did

• Only biotic slides had cells.

Dropdown

All ​

Select answer

things are made of cells. All cells are the ​

Select answer

units of living things. All cells come from ​

Select answer

.

See you tomorrow!