Organisms
Classification
Fossils
Organ Systems
Miscellaneous
100
Any evidence of organisms that lived in the past is called
fossils
100
The classification system groups of organisms according to similar characteristics is called
traits
100
Many fossils are skeletons preserved in
rock
100
The smallest unit of living matter is a
cell
100
A bacteria and a virus are similar because they are
small and can cause disease
200
Any living thing that carries our five basic life functions on its own is considered an
organism
200
The classification group that has fewer members than all the other groups except the species is a
genus
200
Knowing how organisms have changed over time helps scientists group living and extinct organisms into
classifications
200
When several organs work together carrying on life functions, they form an
organ system
200
A period when many different species die out is called a
mass extinction
300
To turn food into energy animals need
oxygen
300
The second part of an organisms scientific name is its
species name
300
By comparing one fossil with another, scientists can learn the fossil's
age
300
The heart contains muscle tissue, nerve tissue, and blood tissue. The heart is an
organ
300
The classification group that is made up of closely related organisms that can reproduce with others like itself is a
species
400
Plant cells differ from animal cells because plant cells have a box like shape along with
chloroplasts and cell walls
400
Classification allows people to communicate about organisms by using one
naming system
400
The youngest fossils are found in younger rock layers found at the
top
400
Organs are formed by
Groups of tissue
400
The six groups used by scientists to classify organisms - ancient bacteria, true bacteria, protist, fungus, plant and animal - are called
kingdoms
500
Scientists compare limbs to see if organisms might be
related
500
The classification system group that has more members than all other groups except a kingdom is
phylum
500
Some scientists believe the extinction of dinosaurs occurred after a giant meteorite hit Earth, causing great clouds of dust to block
sunlight
500
An undeveloped animal or plant is called an
embryo
500
The first part of an organisms scientific name is its
genus name
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