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WorksheetsInvestigation 4.1 and 4.2 Quiz Review
Total questions: 12
Worksheet time: 9mins
What is the arrow in a chemical equation...
H2 + O2 --> H2O
Reactants
Products
Yields
Chemical Equation
Why do elements bond?
To be friends
To create a new element
To become stable
To get bigger
Energy is _____ when new bonds form.
absorbed
released
lost
gained
Energy is ______ when bonds break.
gained
lost
released
absorbed
What will have more mass when a chemical change is complete: the substance before the chemical reaction or the product after the reaction is complete?
They both will have the same mass
The product always has more mass than the reactant
The staring substance will have more mass than the product
They both will lose mass after the reaction
The process by which one or more substances change to produce one or more different substances
Chemical Process
Reactant
Chemical Reaction
heat or light is produced
How is a chemical change different from a physical change?
there is no difference
a physical change creates a new substance
a chemical change creates a new substance
In chemical reactions, what does the Law of Conservation of Matter mean?
Matter is not created or destroyed.
The total mass of the reactants is greater than the total mass of the products.
The total mass of the reactants is less than the total mass of the products.
Matter is not changed.
In a chemical reaction, no new atoms are created, and no atoms are destroyed.
