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Life Science

life science notes

QuestionAnswer
What is the definition of prediction? To make a forecast.
What is the definition of classify? Group by similar charateristics.
Define inference? A possible explanation or guess about an observation.
What is communication? Telling others what you know.
What is an observation? Recognizing and noting some FACTS to gather information about the world. Observations must be specific and accurate so it means the same to everyone.
What do scientists do? Scientists make sense of nature and improve our world through observations & experiments.
How do you make observations? By using your 5 senses. (see, touch, taste, listen, smell.)
What 2 kind of observations are there? Qualitative and Quantitive.
What is a Quantitative observation? Factual descriptions that do use numbers.
What is a Qualitative observation? Factual descriptions that do NOT use numbers.
Who uses the Metric system? Scientists use the SI or Metric units of measurements.
Why is the Metric system used? It is easy to convert from one unit to another by just moving the decimal since the Metric system is base ten.
What is an Observational Investigation? A lab (investigation) when changes are being observed.
What is an Experimental Observation? A lab (investigation) when the hypothesis is being tested.
What is a hypothesis? It is an educated guess.
What is an Independent Variable? An independent variable is the manipulated variable in an experiment. (changes)
What is a Dependent Variable? It is the change that responds to the independent variable. This change is the data collected.
What is a constant? It is the factor that MUST stay the same in order for the experiment to be a fair test. The experimenter may only change one variable-the i.v.- while other factors must remain the same.
What is a control? It is a standard of comparison.
What is the definition of a Fair Test? An experiment that changes only one factor.
What are repeated trials? That is when you complete an experiment many times. This is done to make the experiment a fair test.
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