1. Cell and Cell Theory
Unit 7: Lesson 1

2. What is a cell? ALL living things are made of cells
smallest unit that can perform the basic activities of life

3. Organisms
individual forms of life that use energy to carry out activities
To be classified as living, something must:
be organized
grow and develop
respond to its environment
be able to reproduce
All organisms need energy, materials, and living space

4. Unicellular
organisms made of a single cell
usually too small to see

5. Multicellular made up of many cells
examples: polar bears, frogs, and water lilies
their bodies are more complex than unicellular organisms
they have many cells that work together
cells carry out basic activities of life and have different functions
Frog: moves with its arms and legs
Water lily: roots hold its soil---take energy from the sun

6. The microscope led to the discovery of cells
most cells are microscopic
they are too small to see without a microscope
a microscope makes things appear bigger

7. The Discovery...
Robert Hooke: used a microscope to observe tree bark and gave the cell its name
Anton Van Leeuwenhoek: One of the first people to use a microscope to see living cells

8. (Polar Bears are multicellular organisms)
The Cell Theory
Every living thing is made up of one or more cells.
(Polar Bears are multicellular organisms)
2. Cells carry out the functions needed to support life.
(Bears have fat cells. Fact cells give the bear energy. They also help protect the bear from the cold)
3. Cells come only from other living things. ( Each bear began as a single cell)

9. Who is Louis Pasteur? french scientist
his work showed that microscopic organisms had something to do with sickness and the spoiling of food
came up with process known as pasteurization, heat used to kill bacteria in milk
Confirmed the cell theory by proving that the theory of spontaneous generation was wrong

10. Bacteria: large group of one celled organisms; may cause disease (Bacteria is plural. Bacterium is singular
Microscope: instrument that uses glass lenses to magnify an object
Multicellular: made up of multiple cells
Unicellular: Made up of a single cell

11. Writing Prompt
Why is the microscope important for studying cells? Why is the tool important for studying whole organisms?
Think about the way a biologist uses a microscope. Think about the way a doctor uses a microscope. How might these uses be different? Why?
***Turn this in on a separate sheet of paper***

12. 3-2-1 Activity on Antony van Leeuwenhoek
3 things you learned
2 interesting facts
1 Write one question that you would ask him
***Complete this in on the backside of the writing prompt***