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A change that can be undone turning the material back to its original form (e.g. ice melting)
A reversible change
A change that cannot be undone (e.g. burning wood)
An irreversible change
The substance that dissolves (e.g. sugar)
A solute
The liquid that dissolves another substance (e.g. water)
A solvent
A mixture where a solute is dissolved in a solvent
A solution
How fast something happens
The rate
When two or more things mix and change to make something completely new
A reaction
The starting materials you mix together in an experiment
Reactants
The new substance that is made after a reaction
Products
A change that can be easily undone (like melting ice)
A reversible change
The muscle that pumps blood through the body
The heart
The number of times your heart beats per minute
Pulse rate
The system in your body used for breathing
The respiratory system
The muscle that helps you breathe in and out
The diaphragm
An organism that spreads disease (like a mosquito)
A vector
A living thing that lives inside or on another living thing
A parasite
