Sience Cards Flashcards
Chemical change
A change in matter that’s produces one of more new substance is a chemical change
Reactants
Substances that under go the chemical chant are called reactants
Products
The substances that form are the products
Exothermic reactions
Bonds that releases energy
Endothermic reactions
When bonds absorb the chemical reaction
Chemical equation
A type of shorthand is used in chemistry
Law of conservation of mass
State that during a chemical reaction matter is not created or destroyed
Open system
Matter can enter form or escape to the surroundings
Closed system
Matter does not enter or leave
Coefficient
Is a number placed in front of a chemical formula In an equation
Synthesis
The reaction of phosphorous which oxygen is a synthesis
Decomposition
Reaction occurs when compounds break down into simpler products
Replacement
Two elements in different compounds trade
Activation energy
Is the minimum amount of energy needed to start a chemical reaction
Concentrations
The rate of reactions is to increase the concentration or reactions
Catalysts
Increases the reaction by lowering the activation energy needed
Enzymes
The cells in your body contain thousands of biological catalysts
Now I know that two ways change I. Matter can be described are
Physical changes and chemical changes
Now I know that kinds of changes can you observe when chemical reactions occur are
Endothermic and endothermic
Now I know that a chemical equation tells you
The substance you start which in a reaction
Now I know that the masses of reactants and products must be
Equal and shows the same mass number
Now I know that three types of chemical reactions are
Synthesis decomposition and replacement
Now I know that in order for reactions to get started
Each are are to react
Now i know that the rate of a chemical reaction can be affected by
Rates and reactions
