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20 Cards in this Set
- Front
- Back
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What system do most scientists use to collect data & do experiements?
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metric system
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Light microsopes produce m___________ i__________ by doing what?
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magnified images by focusing visible light rays.
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Eletron microsopes produce images by doing what?
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focusing beams of electrons.
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Metric system is based on multiples of what number?
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10
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1 meter = ____ cm
1 meter = ______ (mm) 1,0000 meters = ___ (km) |
100 cm
1000 mm 1 km |
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In the metric system what is used to measure volume?
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liter
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In the metric system what is used to measure mass?
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grams
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In the metric system, what is used to measure temperature?
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celcius
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Mass
1 kilogram = ______ grams(g) 1 gram = ______ milligrams(mg) 1000 kilograms = ____ metric ton (t) |
1000 grams
1000 milligrams 1 metric ton |
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Explain one way biologists record data from an experiment:
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By using a data table, then the data is plotted on a graph to make it easier to interpret.
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What do compound light microscopes do?
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Allow light to pass trhough the specimen and use 2 lenses to form an image.
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What microscope can see organisms and cell alive?
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compound light microsope.
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What microsope is most commonly used?
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Light microscopes.
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What is a cell culture?
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a group of cells that develops from a single cell by being placed into a testing dish with a nutrient solution that allows the cells to multiply.
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What technique do biologists use to separate the different cell parts?
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Cell fractionation
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What kind of objects can be observed with an Electron Microsope?
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Only dead and preserved cells
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What kind of objects can light microsopes observe?
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dead and some alive cells and organisms
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What is the purpose and technique of cell fractionation?
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The purpose is to study just one part of the cell. The technique is to break the cell into pieces in a blender, etc....
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What are 2 common laboratory techniques that biologists use to study cells?
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cell culturing and cell fractionation.
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Why do scientists need to use a common system of measurement?
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To repeat and test each others experiments they need to use the same system.
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