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3.1
3.2
3.3
3.4
Vocabulary
100
Change in the state of a substance.
What is a physical change?
100
Numbers in front of chemical formulas that indicate how many molecules take part in the reaction.
What are coefficients?
100
This is released or absorbed in a chemical reaction.
What is energy?
100
Affects the rate of a chemical reaction by changing the speed at which particles in reactants move.
What is temperature?
100
Substances formed by a chemical reaction.
What are products?
200
In this reaction, a new compound is formed by the combination of simpler reactants.
What is a synthesis reaction?
200
Scientific law that says atoms are neither created nor destroyed.
What is the Law of Conservation of Mass?
200
Plants absorb energy and turn carbon dioxide and water into oxygen and glucose.
What is photosynthesis?
200
Process by which cells obtain energy from glucose molecules.
What is respiration?
200
Substances present at the beginning of a chemical reaction.
What are reactants?
300
In this reaction, one reactant is always oxygen and the others are carbon and hydrogen.
What is a combustion reaction?
300
Chemical equations represent how these are rearranged in a chemical reaction.
What are atoms?
300
Reaction in which energy is released.
What is an exothermic reaction?
300
This indicates the direction of a chemical reaction.
What is an arrow?
300
Solid product formed when chemicals in two liquids react.
What is a precipitate?
400
In this reaction, a reactant breaks down into simpler products.
What is a decomposition reaction?
400
These are the numbers below the chemical formulas in a chemical reaction.
What are subscripts?
400
Reaction in which energy is absorbed.
What is an endothermic reaction?
400
The use of photoresist is one step in the making of these.
What are microchips?
400
Substance that increases the rate of a chemical reaction.
What is a catalyst?
500
Measurement of the number of particles present in a certain volume.
What is concentration?
500
The only numbers that can be changed when balancing equations.
What are coefficients?
500
An animal that has an exothermic reaction take place in its body.
What are fireflies, fish, jellyfish, shrimp, beetles?
500
The term for catalysts within the human body.
What are enzymes?
500
These are broken and formed between atoms during a chemical reaction.
What are bonds?