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Chemistry
Miscellaneous
Environment
Hydrology
Periodic Table
100
A mixture that is different throughout itself.
What is a heterogeneous mixture?
100
Having opposite charges that are attracted to each other.
What is polarity?
100
The rivalry between organisms for certain resources.
What is competition?
100
The hydrolic cycle
What is another name for the water cycle?
100
Vertical rows on the periodic table.
What is a group?
200
These elements have properties of both nonmetals and metals.
What are metalloids?
200
Water molecules attracted to othe water molecules.
What is cohesion?
200
A level of energy on a food pyramid.
What is a trophic level?
200
Water that is safe to consume
What is potable water?
200
The group of elements that are stable and don't react with anything.
What are the noble gases?
300
Mixtures made up of two or more elements.
What are compounds?
300
The amount of suspended particles present in water.
What is turbidity?
300
An essential part of an ecosystem that is not living.
What is an abiotic factor?
300
Three
How many atoms does one molecule of water (H2O) contain?
300
Theses metals have low boiling and melting points.
What is the halogen group?
400
Invented by Dmitri Mendeleev.
What is the periodic table?
400
A substance changes its identity.
What is a chemical change?
400
Organisms work together to benefit themselves.
What is cooperation?
400
The deepest zone of the ocean
What is the hadal zone?
400
Are called the "inner transition metals".
What are lanthanides and actinides?
500
The mass of the an atom.
What is atomic mass?
500
The deeper layers beneath the surface are the oldest, and the newest layers are younger.
What is the law of superposition?
500
The measurement of water's solubility and biodiversity
What is pH?
500
The amount of heat water can absorb without evaporating?
What is specific heat?
500
These elements reside in the middle of the periodic table, have many valence electrons, and conduct heat and electricity.
What are transition elements?