Chemical Physical Change Conservation of Mass

Quiz
•
Science
•
8th Grade
•
Hard
Standards-aligned
Charles Martinez
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
One reactant, with a mass of 7 grams (g), is combined with another reactant, with a mass of 3 g, in a sealed container. After the reaction, what is the most reasonable prediction for the total mass of the products of this reaction?
7g
3g
10g
4g
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In a sealed container, Sarah combines a reactant with a mass of 20 grams with another reactant with a mass of 16 grams. After the reaction, what is the most reasonable prediction Sarah can make for the total mass of the products of this reaction?
26g
4g
8g
36g
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
According to the law of conservation of mass, mass is neither created nor destroyed in any ordinary chemical reaction. Which of the following is a demonstration of this law?
When hydrogen and oxygen combine to make water, oxygen atoms are converted to hydrogen atoms.
When sodium and chlorine combine to make salt, some of the sodium is always lost.
When water breaks down into hydrogen and oxygen, the number of atoms always remains the same.
When iron reacts with oxygen to form rust, the mass of the iron atoms increases.
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Antonio conducts an investigation by adding reactants in a sealed container, as shown in the illustration. One of the reactants is 19g and the other reactant is 5g. After the reaction, Antonio can predict the total mass of the products of this reaction to be which of the following?
5g
14g
19g
24g
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
One reactant with a mass of 6 grams, is combined with another reactant, with a mass of 18 grams, in a sealed container. After the reaction, what is the most reasonable prediction for the total mass of the products of this reaction?
12g
4g
20g
24g
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A chemical reaction can be defined as an interaction of chemicals that produces new chemicals. An illustration of a chemical reaction is provided. Taking into account the law of conservation of mass, the most reasonable conclusion is that the missing product from the reaction illustrated here would consist of what?
One oxygen atom and one hydrogen atom
One chlorine atom and two hydrogen atoms
One oxygen atom and three hydrogen atoms
Two chlorine atoms and three hydrogen atoms
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is true regarding the atoms involved in a chemical reaction?
The same number of each type of atom will always be present before and after a chemical reaction takes place.
Some of the atoms present before the reaction will always be lost during a chemical reaction.
Some of the atoms will always be changed into a different type of atom by a chemical reaction.
During a chemical reaction, atoms will always be combined into much larger molecules.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
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