Hydrosphere
Chemistry
100
the concentration of salts in a liquid, such as water; note that it is not just the amount of sodium chloride
What is salinity?
100
A type of matter that forms when two or more substances are combined but do not join together chemically
What is a mixture?
200
This is the tendency for water molecules to stick to one another; this property causes water droplets to form spheres as they fall
What is cohesion?
200
Anything that has mass and volume.
What is matter?
300
This is what makes stuff float; any object or substance that is placed in a liquid of greater density will float.
What is buoyancy?
300
Basic subatomic particle that has a positive charge.
What is a proton?
400
Little to no dissolved salts; most lakes, rivers, and their tributaries
What is freshwater?
400
Roughly equal to the number of neutrons plus the number of protons in the nucleus of one atom of the element.
What is atomic mass?
500
In between freshwater and marine in terms of salinity; where rivers meet the ocean; water is termed “brackish”
What is an estuary?
500
All matter is composed of atoms. Atoms are the building blocks of matter. Atoms of a given element are identical. All elements of the same (neutral) element have the same number of protons and electrons Atoms of different elements combine in simple whole- number ratios to form chemical compounds. The ways atoms combine to form compounds is determined by the valence electrons of an element.
What is the atomic theory?
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