Exam Flashcards
Scientific Method
A scientific way to solve problems or answer questions
What is Step 1 of the Scientific Method?
Ask a question
What is Step 2 of the Scientific Method?
Form a hypothesis
What is Step 3 of the Scientific Method?
Conduct an experiment
What is Step 4 of the Scientific Method?
Analyze the data
What is Step 5 of the Scientific Method?
Draw a conclusion
What is Step 6 of the Scientific Method?
Communicate your results
What is a cell
The smallest unit that can perform all the processes necessary for life
Who made the cell theory
Robert Hooke in 1665
What are the three parts to the cell theory
All organisms are made of one or more cells
The cell is the basic unit of all living things
All cells come from existing cells
Why are most cells small?
Because food and waste must pass through the cell surface
How do you do surface area to volume ratio?
Surface area divided by volume
What is a lens?
A piece of curved glass or other clear material that brings light rays together or spread them apart
Magnify
To enlarge
Compound microscope
Light illuminated, 2-D, high magnification, low resolution, and you can see individual individual cells
Resolution
The amount of detail so you can see
Dissection microscope
Used for dissection, light illuminated, 3-D, unable to view individual cells due to low magnification
Scanning electron microscope (SEM)
Uses electron illumination, 3-D, high magnification, high resolution, black-and-white, and is coated in gold two electrons pounds off to give an exterior view
Transmission electron microscope (TEM)
Uses electron illumination, today, I can magnification, high resolution, and electron beams pass through thin slices of specimens
What are the three different objectives in a microscope
4x, 10x, 40x
You multiply it with the ocular lens(10x) to get overall objective
What are the levels of organization in organisms
Cells tissues organs organ systems in organisms
What are the human body systems?
The circulatory, respiratory, muscular, skeletal, nervous, digestive, and excretory system