Characteristics of Living Things
Food
Evolution
General 1
General 2
100
a membrane covered structure that contains all of the materials necessary for life
what is a cell?
100
Food, shelter, water, air
What are the things living things need to survive?
100
the process by which populations change over time
What is evolution?
100
Naturally occurring differences in traits.
What are variations?
100
Changes that occur slowly.
What is gradual changes?
200
an organism made up of only one cell
what is unicellular?
200
Animals that make their own food.
What are producers?
200
All individuals of a species that live in an area at the same time
What is population?
200
An inherited trait that helps an organism survive and reproduce.
What is an adaptation?
200
Changes that occur in a very quick span of time
What are catastrophic changes?
300
an organism made up of more than one cell
what is mulitcellular?
300
Animals that eat other organisms to get food.
What are consumers?
300
The practice by which humans select plants and animals for breeding
What is artificial selection?
300
All members of the species have died.
What is extinction?
300
The standard method used to divide Earths long history.
What is the geologic time scale?
400
A change that affects the activity of an organism.
What is a stimulus?
400
Animals that break down dead organisms for food.
What are decomposers?
400
The process by which organisms that inherit advantageous traits reproduce more successfully
What is natural selection?
400
Determines whether a fossil formed before or after another fossil.
What is relative dating?
400
The largest divisions of the geologic time scale
What are eons?
500
The maintenance of a stable internal environment
What is homeostasis?
500
Growing and learning
What is development?
500
A change in genetic material.
What is a mutation?
500
Estimates the age of a fossil in years 
What is absolute dating?
500
Precambrian Time, Paleozoic Era, Mesozoic Era, Cenozoic Era
What are the 4 main time divisions?
M
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