Unit 1: Chemical Reactions key concepts
Authored by Harvey Figueroa
Science
7th Grade
NGSS covered
Used 22+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What key concept will help make sense of this evidence and claim:
The reddish brown substance was not the same as the iron pipe or fertilizer substance.
Different substances have different properties.
Groups of atoms repeat to make up a substance. (More of the same repeating group, means more of the same substance.)
During a chemical reaction, atoms do not change from one type to another and do not change in number.
In a chemical reaction atoms are not destroyed and are not created.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-1
2.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
What key concepts (pick two) will help make sense of this evidence: Every time we saw a substance with different properties we saw that it had different molecular arrangements.
During a chemical reaction, one or more reactants change into one or more different substances with a different arrangement of atoms.
Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.
During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.
Things that are too small (or too large) to see can be studied with models.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-1
3.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
What key concept will help make sense of this evidence and claim: Atoms and molecules are very small, but they can make up much larger objects, like diamonds.
During a chemical reaction, one or more reactants change into one or more different substances with a different arrangement of atoms.
Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.
Groups of atoms repeat to make up a substance. (More of the same repeating group, means more of the same substance.).
In a chemical reaction atoms are not destroyed and are not created.
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What key concept will help make sense of this evidence and claim:
The reddish-brown substance is not the same as the fertilizer or pipe substance.
During a chemical reaction, atoms do not change from one type to another and do not change in number.
During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.
Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.
Things that are too small (or too large) to see can be studied with models.
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
What key concept (pick the best one) will help make sense of this evidence or claim:
When we looked at printouts of scale models of different substance changes, we observed that every time properties changed, atomic arrangements changed.
During a chemical reaction, one or more reactants change into one or more different substances with a different arrangement of atoms.
In a chemical reaction atoms are not destroyed and are not created.
During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.
During a chemical reaction, atoms do not change from one type to another and do not change in number.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Which key concept will help explain the claim and evidence:
When we mixed two clear liquids in class, we saw two new substances form that were white solids. (See the atomic-scale models.)
Groups of atoms repeat to make up a substance. (More of the same repeating group, means more of the same substance.)
During a chemical reaction, atoms do not change from one type to another and do not change in number.
During a chemical reaction, one or more reactants change into one or more different substances with a different arrangement of atoms.
Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.
Tags
NGSS.MS-PS1-2
7.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
Which key concepts (pick two) help us make sense of the claim and evidence:
When Jack added chlorine gas to what he thought was an empty container, a new solid substance formed. The container must not have been empty. (See image.)
During a chemical reaction, atoms do not change from one type to another and do not change in number.
During a chemical reaction, all of the atoms that make up the reactants rearrange to form the products.
In a chemical reaction atoms are not destroyed and are not created.
Substances have different properties because they are made of different groups of atoms. These groups vary in the type or number of atoms that make up the group.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
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