Iqwst Ls Chemistry

Quiz
•
Science
•
7th - 8th Grade
•
Hard
Standards-aligned
Charles Martinez
FREE Resource
13 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a chemical reaction?
New atoms are formed when substances are mixed together
A solid material melts and becomes a liquid
Atoms of the reactants rearrange to form a new substance
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student dissolves 3 gram of sugar in 10 grams of water. She then determines the mass of the solution. What is the mass of the dissolved sugar and water?
13 grams because the substance is a mixture and the molecules are floating next to each other.
13 grams because a chemical reaction occurred making a new substance.
Less then 13 grams because the water absorbed the sugar.
More than 13 grams because the sugar absorbed the water.
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about the principle of the conservation of mass?
The mass of the products is never equal to the mass of the reactants.
The mass of the products is less than the mass of the reactants.
The mass of the products is equal to the mass of the reactants.
The mass of the products is greater than the mass of the reactants
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jay had two clear liquids in bottles. The mass of one liquid was 10.0 grams and the other was 7.0 grams. When he mixed them, a yellow solid formed and settled to the bottom of the bottle. He predicted that the liquid plus the solid would have more mass, so he put the bottle on a scale. The mass was 17.0 grams.
Why did the mass not change?
Because it is a mixture and mass doesn't change.
His scale is broken.
Do to the Law of conservation of mass, matter cannot be created nor destroyed so the mass is the same as the reactant and the product.
He forgot to tare his bottle and the scale had the mass of the bottle added in.
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement is always true about conservation of matter?
If a gas forms, the mass of a system decreases.
The mass of a system does not change during a chemical reaction.
If a solid forms, the mass of a system increases.
The mass of a system changes when a substance changes from liquid to gas, but it does not change in a chemical reaction.
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation
magnesium + oxygen 🡪 magnesium oxide, Magnesium + oxygen is the reactant?
true
false
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation
magnesium + oxygen 🡪 magnesium oxide, magnesium oxide is the product?
true
fale
Tags
NGSS.MS-PS1-2
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