Chemical Reactions Unit Review

Practice question: Choose the question that says "pick me"

• Don't pick me

• Definitely not this one

• Pick me!

• Whoa! Way to read ALL of the questions! You are a quiz super star! Self-high-five!

What does "rearrange" mean?

• To make sure to read all of the answers on the quiz

• To not add or take away but to move things around. To remix

• To not just choose the longest answer because sometimes teachers put in long answers to make sure you are paying attention.

• To not pick the shortest answer

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-5

The diagram above shows the repeating groups of atoms that make up two samples. Both samples are red powdery solids at room temperature. Will the other properties of the two samples be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will be different because there are more repeating groups of atoms in Sample 1.

• The other properties will be the same because both samples are red at room temperature.

• The other properties will be the same because both samples are powdery solids at room temperature.

• The other properties will be same because the repeating groups of atoms that make up the two samples are the same.

Tags

NGSS.MS-PS1-1

Can one substance change into another substance? (read carefully)

• No, because things can mix, but they can't change into new things

• Yes, because new atoms can be created

• No, because atoms can not be destroyed

• Yes, because atoms can be rearranged.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an example of a substance?

• table salt (NaCl)

• Teddy Bear

• Mechanical pencil

• A person

Tags

NGSS.MS-PS1-4

The diagram above shows the repeating groups of atoms that make up two samples. Both samples are solids at room temperature. Will the other properties of the two samples likely be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will likely be different because there are more repeating groups of atoms in Sample 2.

• The other properties will likely be different because the repeating groups of atoms that make up the two samples have different numbers of atoms.

• The other properties will likely be the same because the repeating groups of atoms that make up the two samples have the same types of atoms.

• The other properties will likely be the same because both samples are solids at room temperature.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which is NOT a substance?

• Water (H2O)

• Diamond (C)

• Hydrogen peroxide (H2O2)

• Chicken nuggets (Nug1T)

Tags

NGSS.MS-PS1-1

Andres is a chemist working at a company that makes ink. To make a new kind of ink, Andres mixed two liquid substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Andres found two solid substances in the sealed container. (Nothing had escaped.) Which of the diagrams to the left shows the repeating groups of atoms that make up the ending substances?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a reactant?

• Something that actanats again

• A starting substance before a chemical reaction

• A potato

• What happens when you have the reflexes of a ninja and can react quickly.

Tags

NGSS.MS-PS1-5

Samira watched a demonstration in which a scientist combined two substances in a sealed container and analyzed the results. The ending substances did not look the same as the starting substances.

Samira was given a diagram with the repeating groups of atoms that make up the starting substances, plus information about the properties of the starting and ending substances. She created a model of the repeating groups of atoms that might make up the two ending substances.

• Samira's model correctly demonstrates how the properties changed with the rearrangement of the atoms. However not all atoms are accounted for. There is a missing reactant.

• Samira's model is correct because the properties are different and the atoms are rearranged.

• Samira's model is incorrect because not all atoms are accounted for

• Samira's model correctly demonstrates how the properties changed with the rearrangement of the atoms. However not all atoms are accounted for. There is a missing product.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5