Physical and Chemical Reactions

Quiz
•
Science
•
7th Grade
•
Hard
+2
Standards-aligned
Jennifer Raygoza
Used 1K+ times
FREE Resource
13 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A chemical change is different than a physical change because in a chemical change...
Chemicals are used
Molecules do not physically touch
A new substance is formed and in a physical change no new substance is formed
The change can be seen but in a physical change it cannot
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In a chemical reaction...
The atoms of the reactants always stay together to form the products
The atoms of the reactants unbond, rearrange, and then rebond to form the products
New atoms are formed which combine to make the products
Some atoms disappear while others multiply to form the products
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In a chemical reaction, mass is conserved. This means that
The mass of the products stays the same during a chemical reaction
The mass of the products is always twice the mass of the reactants
The mass of the reactants stays the same during a chemical reaction
The type and number of atoms in the reactants equals the type and number of atoms in the products
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If the reactants on the left side of a chemical equation are C3H8 + 5O2, the products in a balanced equation could be
2CO2 + 3H2O
3CO + 4H2O
3CO2 + 4H2O
4CO2 + 3H2O
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If two substances react and the temperature of the mixture increases, the reaction is
Not one that produces anything new
Exothermic
One that needs a catalyst
Endothermic
Tags
NGSS.MS-PS1-4
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
If two substances react and the temperature of the mixture decreases, the reaction is
Endothermic
Never going to happen unless it is heated
Exothermic
one that causes atoms to be destroyed
Tags
NGSS.MS-PS1-4
NGSS.MS-PS3-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The law of conservation of mass states
matter can not be created or destroyed
matter can be created and destroyed
matter can be changed and created
matter can be rearranged and destroyed
Tags
NGSS.MS-PS1-5
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