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8th Grade Science CH 1 S 2 notes
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31
Science
8th Grade
08/27/2012

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Term
Who has a huge collection of skills from which to choose to gain knowledge from?
Definition
scientists
Term
What are some of the skills that scientists have?
Definition
thinking, observing, predicting, investigating, researching, modeling, measuring, analyzingm and inferring.
Term
What is another way science can advance?
Definition
with luck and creativity
Term
What often follows a general pattern?
Definition
investigations
Term
How do most investigations begin?
Definition
by seeing something and then asking a question about what was observed
Term
How do scientists collect more information?
Definition
they almost always make more observations
Term
How do most insvestigations begin?
Definition
by making observations and asking questions
Term
What is a hypothesis?
Definition
a reasonable and educated possible answer based on what you know and what you observe
Term
How do you infer?
Definition
to draw a conclusion based on what you observe
Term
What is a way to investigate questions?
Definition
by doing a controlled expirement
Term
What is a controlled expiriment?
Definition
involves changing one factor and observing its effect on another while keeping everything else the same
Term
What are factors that can be changed in an experiment?
Definition
variables
Term
What is the variable that is changed in in an experiment?
Definition
independent variable
Term
What is the dependent variable?
Definition
changes as a result of a change in the independent variable
Term
What variable is the one that is usually observed in an experiment?
Definition
the dependent
Term
What are the variables that are not changed in an experiment?
Definition
constants
Term
What is the most important safety advice in a science lab?
Definition
always think before you act
Term
What must scientists follow?
Definition
safety regulations
Term
Never reach into or under what?
Definition
into holes or under rocks
Term
What can help you visualize something that is difficult to see or understand?
Definition
model
Term
Models can also be of what?
Definition
things that can't be seen because they don't exist anymore or they haven't been created yet
Term
Most models fall into 2 basic types. What are they?
Definition
physical, computer, and idea models
Term
What are some examples of physical models?
Definition
table top solar system, a globe of earth, rplica of the inside of a cell, or a gumdrop tootpick model of a chemical compound
Term
What are built using computer software?
Definition
computer models
Term
Some models are ideas or concepts that describe what?
Definition
how someone thinks abou something in the natural world
Term
Who is famous for his theory of relativity?
Definition
Albert Einstein
Term
What is one of the most famous models Einstein used for his theory is the mathematical equation?
Definition
E=mc squared
Term
What does e=mc2 explain?
Definition
explains that mass, m, can be changed into energy, e
Term
How do sketch artists attempt to draw a picture?
Definition
from the description given by someone
Term
What does a scientific investigation always contain?
Definition
observations aka data
Term
When is data gathered?
Definition
during a scientific investigation and can be recorded in the formof descriptions, tables, graphs, or drawings
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