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2
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100
The broadest organization of living things
kingdom
100
The body system that contains the brain and spinal cord
nervous system
100
The tube that takes air from the mouth and nose to the lungs
trachea
100
The tool used to separate a solute from a solvent
hot plate
100
The blood vessel that carries blood back to the heart
veins
200
The process that plants use to create their own food
photosynthesis
200
The part of the cell that stores water
vacuole
200
The boiling point of water in celsius
100
200
The freezing point of water in celsius
0
200
The body system that includes esophagus, stomach, intestines
digestive
300
A group of tissues that work together makes what
organ
300
The gas that plants release
oxygen
300
What creates a U shaped valley through a destructive process?
glacier
300
The one thing that is changed in a scientific experiment
variable
300
What is sodium chloride?
salt
400
The boiling point of water in fahrenheit
212
400
A formation at the mouth of a river by deposition of silt
delta
400
The freezing point of water in fahrenheit
32
400
The most specific organization of living thing
species
400
The tube that carries food from mouth to stomach
espophagus
500
The blood vessel that carries blood away from the heart
arteries
500
Body system that contains heart, blood, veins, arterties
circulatory
500
The gas that plants use 
carbon dioxide
500
When light bends or changes directions
refraction
500
The part of the cell that is responsible for photosynthesis
chloroplast
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