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Chapter 1 Biology
What is Science?
| Question | Answer |
|---|---|
| to investigate and understand nature, explain events in nature, and use these explanations to make useful predictions | the goal of science |
| an organized way of using evidence to learn about the natural world | science |
| using one or more of the senses (hearing touch..) to gather information | observation |
| evidence collected from observations | data |
| this type of observation involves numbers or qualities that can easily be measured of counted | quantitive |
| this type of observation involves characteristics that cannot be easily counted like color or texture | qualitative |
| logical interpretation based on prior knowledge and experience | inference |
| possible explanation for a set of observations or answer to a scientific question | hypothesis |
| the idea that life could arise from nonliving matter | spontaneous generation |
| whenever possible, a hypothesis should be tested by an experiment in which only ________ variable is changed at a time. All other variables should be kept unchanged, or __________ | one, controlled |
| the variable that is deliberately changed | manipulated variable |
| the variable that is observed and changes in response to the manipulated variable is the___________ variable | responding |
| a hypothesis very well supported from evidence built up from a number of investigations | theory |
| in science, the word _______ applies to a well tested explanation that unifies a broad range of observations | theory |
| true/false-a theory is considered absolute truth, a theory may not be changed based of new information found | false |
| _______ is the science that seeks to study living things | biology |
| Name some characteristics living things share | -they are made of cells-living things reproduce-are based on a universal genetic code-grow and develop- respond to their environment-maintain a stable internal environment-as agroup, change over time |
| a collection of living matter enclosed by a barrier that separates it from its surroundings | cell |
| when two cells from different parents unite to produce the first cell of a new organism | sexual reproduction |
| reproduction in which the new organism has a single parent | asexual |
| combination of chemical reactions through which an organism builds up or breaks down material as it carries out its life processes | metabolism |
| when a group of organism changes over time | evolve |
| decimal system of measurement whose units are based on standards and are scaled on multiples of ten | metric system |
| devices that produce magnified images of structures that are too small to see with the naked eye | microscope |
| _______ microscopes produce magnifies images by focusing visible light rays. | light |
| ________ microscopes produce magnifies images by focusing beams of electrons | electron |
| theses microscopes allow light to pass through the specimen and use two lenses to from an image | compound light microscope |
| technique used by biologists to separate the different cell parts | cell fractionation |
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ebony5407