8.P.1.4 Review
Authored by Alexia Colon
Science
8th Grade
NGSS covered
Used 20+ times
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The law of conservation of matter states that:
matter is neither created nor destroyed.
the mass of the products is always greater than the mass of the reactants.
the mass of the products is always less than the mass of the reactants.
matter is always converted into an equal amount of energy.
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Before a chemical reaction, the total mass of two reactants is measure to be 40 grams. After the reaction, what should be the total mass of the products?
0 grams
20 grams
40 grams
80 grams
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to atoms in a chemical reaction?
They turn into energy.
They are destroyed.
They change into atoms of different elements.
They are rearranged.
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hydrogen and oxygen react to product water. Which of the following is the correctly balanced chemical equation for this reaction?
H2 + O2 --> H2O
2H2 + O2 --> 2H2O
H2 + O2 --> H4O2
2H2 + 2O2 --> 4H2O
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The law of conservation of mass can be demonstrated by a chemical reaction. Which of the following models of a chemical reaction best represents the law of conservation of mass?
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student heated a 10g sample of a compound in an open container. A chemical reaction occurred. The mass of the sample was measured again and found to be less than before. Which of the following explains the change in mass of the sample?
The heat caused the compound to become less dense.
The reaction gave off more heat than was added.
Some of the lighter atoms were converted to energy.
One of the reaction products was a gas.
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
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