THE LETTER "A"
THE LETTER "C"
THE LETTER "E"
THE LETTER "P"
THE "BOMBS"
100
The layer of air surrounding the Earth.
What is atmosphere?
100
Meat-eater
What is carnivore?
100
A sequence of changes in the plant and/or animal life of a region over time
What is ecological succession?
100
The process in which plants use the sun's energy to convert carbon dioxide and water into glucose
What is photosynthesis?
100
The temperature at which additional thermal energy causes a substance to change from a liquid to a vapor
What is boiling point?
200
The smallest part of an element that is recognizable as that element.
What is an atom?
200
A substance composed of two or more chemically bonded elements
What is compound?
200
A substance consisting of exactly one type of atom
What is element?
200
A positively charged fundamental atomic particle
What is proton?
200
The movement of liquid through a membrane
What is osmosis?
300
Simple, one-celled plantlike organism found in water or damp places; includes seaweeds, pond scum, and so on.
What is algae?
300
A material that allows heat or electricity to flow through it with minimal resistance
What is conductor?
300
A negatively charged fundamental atomic particle
What is electron?
300
A complex molecule composed of amino acids that carries out a variety of processes in cells
What is protein?
300
The smallest unit of a chemical compound
What is molecule?
400
A compound that releases hydrogen ions when dissolved in water; has a pH of less than 7
What is acid?
400
The lowest-level structure of any living organism that can perform all the functions of life, including reproduction
What is cell?
400
The changing of a fluid into gas
What is evaporation?
400
An organism that invades another organism and feeds off it
What is parasite?
400
A compound that releases hydroxide ions in water; has a pH of more than 7; is sometimes called an alkali
What is base?
500
Approximately -273° C; the lowest possible temperature
What is absolute value?
500
The process whereby a decrease in energy causes vapor particles to return to a liquid phase
What is condensation?
500
Wearing away; typically the washing away of sand or rock by running water or wind
What is erosion?
500
Force per unit area
What is pressure?
500
A close relationship between two organisms that is mutually beneficial
What is symbiosis?
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