Chapter 1 Section 4 Holt Life Science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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SI | International System of Units
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area | is measured in square units
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liter | metric unit for meausuring liquid.
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area | the amount of surface something has.
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compound light microscope | consists of a tube with lenses, a stage and a light source, often used in classrooms
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electron microscope | tiny particles of matter are used to magnify image
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transmission electron microscope | electrons pass through the specimen and produce a flat image, magnifies up to 200,000 times the actual size.
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scanning electron microscope | electrons bounce off the surface of the specimen and produce a 3D image, magnifies up to 100,000 times actual size
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x-rays | used for almost a century (100 years)to see internal structures of organisms (bones, heart, lungs) and the stuctures of proteins
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CT scans (computerized tomography) | low dosage x-ray beams are passed through the body at different angles, and often a dye is injected to help highlight tissues- provides a clearer, more detailed image than x-rays useful for studying brain and spinal tissue.
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CT scans | computerized tomography
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MRI | magnetic resonance imaging
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MRI | provides a clearer image than x-rays by using short bursts of magnetic field, useful for studying brain and spinal tissue
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CT, MRI, SEM and TEM | data and images are transferred to a computer to create the image
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computer | used to collect, store organize and analyze information, can create graphs, solve math problems and analyze data
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graduated cylinder | measures the volume of liquids and irregular shaped solids, basic unit is liter, can be converted to cubic centimeters
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thermometer | measures temperature (how hot or cold an object is) basic unit is degree
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balance scale or triple beam balance | measures the mass of an object,basic unit is kilogram
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meter stick | measures the length of objects, basic unit is meter
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benefit of using metric system | easier to compute, base 10, more accurate, less errors.
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benefit of using metric system | shared by all scientists worldwide
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volume | the amount of space an object occupies (takes up)
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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