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Terms
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- Observing
- Using the 5 senses (see, hear, touch, smell, taste) to find out about objects and events, their characteristics, properties, differences, similarities, and changes
- Inferring -
- formulating assumptions or possible explanations based upon observations.
- dependent
- the one being measured to determine its response
- Measuring
- using standard measures or estimations to describe specific dimensions of an object
- Organizing Data in Tables and Graphs -
- making data tables and graphs for data collected.
- steromicroscopes disadvantages
- only magnify up to 100-150x
- independent variable
- one being manipulated
- high power 40X or 43X or 45X
- 40X or 43X or 45X
- Movement of species
- Actual movement is opposite to appeared direction of movement. 2. If an organism is actually moving ( ), it will appear to be moving ( ).
- capacity
- the amount that can be measured with the instrument.
- Formulating Hypotheses - stating the proposed solutions or expected outcomes for experiments.
- stating the proposed solutions or expected outcomes for experiments. This ideas must be testable
- Oculars
- normally 10-12X
- when changing objects from scanning to low to high power the following will occur:
- a. the size of the field of view decreases. b. the field of view is darker. c. the size of the image increases. d. the resolution (ability to separate small details) increases. e. the working distance (distance between coverslip & objective) decreases f. the depth of focus (thickness of the specimen which may be seen in focus) is reduced
- Appearance of Objects
- Inverted and reversed (upside-down & backwards) If an "e" is placed in the stage in its normal position, it will appear as an " upside down e". 3. Only a thin layer of the specimen is in focus at any level (depth of focus).
- aquiaring data
- collecting qualitative and quantitative data as observations and measurements.
- scanning power objective
- 4X or 5X or 6X
- low power
- 10X or 12X
- Communicating
- using words, symbols, or graphics to describe an object, action or event.
- Formulating Models - recognizing patterns in data and making comparisons to familiar objects or
- recognizing patterns in data and making comparisons to familiar objects or ideas
- Designing Investigations -
- designing an experiment by identifying materials and describing appropriate steps in a procedure to test a hypothesis.
- guessing the most likely outcome of a future event based upon a pattern of evidence.
- predicting
- constants or controlled variables.
- all being kept constant
- total magnification
- Multiply ocular magnification times objective magnification
- Identifying of Variables -
- stating the changeable factors that can affect an experiment. It is important to change only the variable being tested and keep the rest constant.
- Understanding Cause and Effect Relationships
- what caused what to happen and why.
- Describing Relationships Between Variables -
- explain relationships between variables in an experiment. i.e dependent and independent
- range
- the high value minus the low value. (Used where zero is not the low value.)
- explaining how to measure a variable in an experiment.
- Operationally Defining Variables
- Numbered increments or graduations
- the value represented by the numbered graduations or increments on the instrument. Some instruments such as balances may have more than one set of numbered increments.
- Classifying
- Grouping or ordering objects or events according to similarities or differences in properties...taxonomy
- Unnumbered increments or graduations -
- the value represented by the unnumbered graduations or increments on the instrument.
- advantages of a stereomicroscope
- produce a truly three-dimensional image, which can be useful in determaning the exact location of an object it can be magnified from 100-150x so you can have a better view of the whole objed has a favorable depth of feild and can be fitted w/ a flurescent lamp
- Experimenting
- carrying out an experiment by carefully following directions of the procedure sothe results can be verified by repeating the procedure several times.