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What are the 3 three types of graphs?
Line, pie, bar
When do you use a line graph? Bar graph? Pie chart?
Changes over time - compare things (like birth months) - percentages
What is the independent variable?
The variable that you manipulate.
The variable that you measure.
What variable always goes on the x-axis?
independent variable
What variable goes on the y-axis?
dependent variable
What is the control group of the experiment?
The group that is kept the same, does NOT receive the variable
What is the experimental group of an experiment?
The group that receives the variable being tested.
What is the variable of an experiment?
Anything that can change or be changed.
What is quantitative data?
Measures or values expressed in numbers.
What is qualitative data?
Data that is measured with your five senses, described by characteristics.
What is the step order of the scientific method?
Ask a question, observe, make a hypothesis, experiment, draw conclusions.
What is a hypothesis?
An educated guess
Define energy.
The ability to do work.
Is Earth an open or closed system? Why?
Open system. Because it allows matter to be freely exchanged.
What is meant by the law of conservation of matter and energy?
Energy and matter can change forms but cannot be created or destroyed.
What is an element?
Something that cannot be broken down into a simpler substance, made up of one type of atom.
What is a compound?
Contains two or more different atoms joined together.
What is a mixture?
Contains two or more different substances that are only physically combined together.
What is a molecule?
A group of atoms held together by chemical forces.
What are Earth's 4 spheres?
Geosphere (land), hydrosphere (water), biosphere (living things), atmosphere (air)
The process by which water vapor turns back to liquid is called what?
Condensation
Define matter.
Anything that takes up space and can be weighed.
What is it called when water vapor is released from a plant into the atmosphere?
Transpiration
Where do humans find fossil fuels?
Geosphere