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Sci 8- Unit 2- Topic 1-2-3
Transcript of Sci 8- Unit 2- Topic 1-2-3
How do we know when something is living?
Well a human is living, and we speak, so maybe it has to talk?
But plants don't speak, and yet they are living... so what makes something come alive??
The truth is that all living things are made up of.....
Cells are the most basic unit of life and
perform the functions that organisms
need to survive... like what?
There are 5 main functions that organisms must carry out to be living:
If cells are really small, how do we know so much about them?
Microcscopes help us see things more clearly, this is how they work
Now test yourself to see if you know the parts...
Now that you know the parts, how do you use the microscope to prepare slides?
So when you look at the cell, what do you see?
visit this site to discover the plant and animal cell:
Just to refresh your memory: What are the two main parts of the plant cell that are not found in an animal cell?
The cell wall, which adds structure to the cell, and the chloroplasts, which is where photosynthesis occurs
Some key points about cells...
1. Anton Van Leeuwenhoek made microscopes, and was the first to observe unicellular organisms, and called them "animalcules".
2. Robert Hooke was the first to coin the term "cell", which came from the word 'cellulae' meaning little rooms.
Field of view is the area under the microscope that you can see. As you increase the magnification, the object becomes more clearly focused, but the field of view will decrease.
-surrounds and protects the contents of the cell
- are much thicker and more rigid than membranes, providing support for the plant or fungi
- distributes materials to different parts of the cell
- controls the cell’s activities
- is a membrane-bound sac acting as a storage space for surplus food,
wastes and other substances the cell is unable to use immediately
- are the structures in which photosynthesis takes place (found in green plants)
5. Waste -->All living things get rid of wastes like plants and carbon dioxide
4. Growth --> To survive, adapt and live a full life
3. Reproduction --> To pass on their DNA to the future
2. Environment -->Living organisms adapt to their environment
1. Energy -->They need energy in order to survive, like food or the sun
Topic 1 review
page 102, all 4 questions
From the internet
From Mr. Swenson