Chemical and Physical Reactions Concepts
Authored by Flo Thomas
Science
7th Grade
NGSS covered
Used 6+ times
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9 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A student mixes two substances and observes a rise in temperature and small, white particles that fall to the bottom of the test tube. What conclusion can be drawn?
A physical reaction occurred because of the temperature change.
A chemical reaction occurred because a new substance was formed.
A physical reaction occurred because it can be reversed by filtering out the particles.
A chemical reaction occurred because two substances were mixed.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
While cooking dinner, a student places a pot full of water on the stove to heat up. The student notices that small bubbles start to appear at the bottom of the pot after three minutes.
What type of property of water is the student observing?
A chemical property because the water is changing to steam.
A chemical property because the water is reacting with the pot.
A physical property because the water is changing to steam.
A physical property because the water is reacting with the pot.
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
What are two ways you can tell that the physical properties of a substance changed during a chemical reaction?
change in color
the substance dissolves
changing from a solid to liquid
appearance of bubbles
production of gas
Tags
NGSS.MS-PS1-2
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is the 2 called in the product of the balanced equation below?
H2 + Cl2 = 2HCl
subscript
coefficient
atomic number
atomic mass
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which chemical equation supports the law of conservation of matter?
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Review the diagram of a chemical equation.
How does this diagram support the Law of Conservation of Matter?
It has products and reactants.
A chemical change has occurred.
The number of atoms of the products equals the number of atoms of the reactants.
The number of atoms of the products and reactants equals an even number.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The box shows the formula for a common substance.
Which statement is true about the substance?
It is composed of 2 atoms of hydrogen and 1 atom of oxygen.
It is composed of 3 different elements.
It is composed of 2 atoms of oxygen and 1 atom of hydrogen.
It is composed of 3 different compounds.
Tags
NGSS.MS-PS1-1
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