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WorksheetsAmplify Chemical Reactions Unit Test Prep
Total questions: 85
Worksheet time: 1hrs 2mins
What is the purpose of using a catalyst in a chemical reaction?
To speed up the rate of the chemical reaction
To increase the cost of the chemical reaction
To change the color of the chemical reaction
To slow down the rate of the chemical reaction
What is the role of temperature in amplifying chemical reactions?
Temperature has no effect on chemical reactions.
Temperature increases the rate of chemical reactions by providing more energy for molecules to react.
Temperature only affects physical reactions, not chemical reactions.
Temperature slows down chemical reactions by reducing the energy available for molecules to react.
How does the presence of a solvent impact the speed of a chemical reaction?
The presence of a solvent can increase the speed of a chemical reaction by providing a medium for the reactant molecules to come into close contact and interact with each other.
The presence of a solvent slows down the speed of a chemical reaction
The presence of a solvent has no impact on the speed of a chemical reaction
The presence of a solvent only impacts the color of the chemical reaction
What is something that is made of all the same atoms or groups of atoms?
Substance
Molecule
Reactant
Property
What is the the relative size of things?
Property
Scale
Model
Extended structure
What is something that can be observed about a substance, such as color, smell, or boiling point?
Substance
Model
Scale
Property
What is a group of atoms joined together in a particular way?
Substance
Atoms
Molecule
Extended structure
What is an object, diagram, or computer program that helps us understand something by making it simpler or easier to see?
Scale
Model
Property
Substance
What is a substance that is added to soil to help plants grow?
fertilizer
corrosive
reactant
substance
What is a structure formed by repeating groups of atoms that link together in a large network?
molecule
extended structure
substance
reactant
What are the tiny pieces that all matter—all the stuff in the world—is made of?
molecules
substances
reactants
atoms
Different _____?_____ have different properties.
boiling points
melting points
molecules
substances
Things that are too small (or too large) to see can be studied with ____________.
scales
models
properties
molecules
Substances have different ___________ because they are made of different groups of ___________.
properties, molecules
atoms, properties
properties, atoms
molecules, properties
Groups of atoms vary in the ______ or ______ of atoms that make up the group.
type, number
letter, number
color, type
number, shape
Groups of atoms repeat to make up a ________.
molecule
reactant
property
substance
Will the properties of the two samples likely be the same or different?
The same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.
The same because both samples have the same number of atoms.
Different because the repeating groups of atoms that make up each sample are different.
Different because there are more repeating groups of atoms in Sample 2.
Will the properties of the two samples likely be the same or different?
Different because the repeating groups of atoms that make up each sample are different.
Different because there are more repeating groups of atoms in Sample 1.
The same because the repeating groups of atoms that make up the two samples have the same number of atoms.
The same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.
Which statement is true about the diagram above?
The samples all have the same properties.
The samples all have different properties.
Sample 1 and 3 have the same properties.
Sample 2 and 3 have the same properties.
Will the properties of the two samples likely be the same or different?
Different because the repeating groups of atoms that make up each sample are different.
Different because there are more repeating groups of atoms in Sample 2.
The same because the repeating groups of atoms that make up the two samples have the same number of atoms.
The same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.
Will the properties of the two samples likely be the same or different?
Different because the repeating groups of atoms that make up each sample are different.
Different because there are more repeating groups of atoms in Sample 1.
The same because the repeating groups of atoms that make up the two samples have the same number of atoms.
The same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.
What is the reddish brown substance that is found in Westfield's water.
rust
fertilizer
pipe substance
iron oxide
What would be considered a molecule in this diagram?
NaCl
Au
H2O
Au and NaCl
Who had a better description of the sample?
David
Luisa
How can scientists make orange juice smell like "fresh squeezed" juice?
using oranges from Florida
adding chemicals
picking the largest oranges
Substances that are made of the same types of atoms will always smell the same.
yes (true)
no (false)
What makes up all substances?
carbon
atoms
diamonds
The image in the box represents what?
repeating atom
repeating group of atoms
extended structure
The image in the box represents what?
repeating atom
repeating group of atoms
extended structure
Which word means the relative size of things?
model
property
scale
molecule
Which word means an object, diagram, or computer program that helps us understand something by making it simpler or easier to see?
model
property
scale
molecule
Which word means a group of atoms joined together in a particular way?
model
property
scale
molecule
Which word means something that can be observed about a substance, such as color, smell, or boiling point?
model
property
scale
molecule
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
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.
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.
What is an example of a substance?
table salt (NaCl)
Teddy Bear
Mechanical pencil
A person
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.
Which is NOT a substance?
Water (H2O)
Diamond (C)
Hydrogen peroxide (H2O2)
Chicken nuggets (Nug1T)
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?
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.
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.
What is a product (in chemical reactions)?
Something a company will try to sell to you
Also a potato
When the mitosis space-time folds into a tetrahedron flux-capacitor
The substance(s) that are created after a chemical reaction
The diagram above shows the repeating groups of atoms that make up two samples. Both samples are gases at room temperature. Will the other properties of the 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 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 gases at room temperature.
The other properties will likely be different because there are more repeating groups of atoms in Sample 1.
The other properties will likely be different because the repeating groups of atoms that make up the two samples have different numbers of atoms.
What is an atom?
Water is an atom
The Hydrogen (H)s and the Oxygen (O)s are atoms
The H2O is an atom
None of these are atoms
A chemist mixed two samples together: a brown solid that melts at about 1,300°C and a colorless liquid that melts at about 20°C. She analyzed the results and found two ending substances. One of the ending substances melts at about 250°C. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples the chemist mixed together?
What is a molecule?
The H2O is a molecule
The Hydrogen (H)s and the Oxygen (O)s are molecules
The H2O is an atom
None of these are molecules
According to the law of conservation of mass, matter cannot be created or (a)
True or False: In a complete chemical equation, there must be the same number of atoms of each element on the reactants and products side.
True
False
In a chemical reaction, atoms (a) and form new bonds.
Look at the chemical equation.
How many atoms of mercury (Hg) are in the reactants?
(a)
Look at the chemical equation.
How many atoms of oxygen (O) are in the reactants?
(a)
Look at the chemical equation.
How many atoms of oxygen (O) are in the products?
(a)
Look at the chemical equation.
How many atoms of nitrogen (N) are in the products?
(a)
What was your favorite chemistry experiment and why?
Which image displays a chemical property about a substance? Choose all that apply.
A)II and IV
B)I, IV, and V
C)I, III, and V
D)II, III, and IV
Justin Bleeber is a young man who decides to burn a pile of leaves instead of bagging them. The pile of leaves weighed three pounds before being burned. After the leaves are burned the leftover ash weighs half a pound. What happened to the rest of the mass of the leaves?
A)It was destroyed.
B)It soaked into the ground.
C)It compacted into the ash.
D)It was turned into smoke and gas.
Which of these is common to all chemical changes?
A)A change of state occurs.
B)A change of color occurs.
C)A new substance is produced.
D)Heat is released into the air.
Where did Dr. Yung (the chemist near Westfield) find the reddish-brown substance when she examined all the possible sources?
coming from the pipes into the houses
in the wells where the water comes from
in the ponds nearby the town
in all water everywhere in Westfield
When examining the following evidence, which is the best evidence we should use?
ugly color, solid
white, small pieces
white, small, grainy, crystals
Consider your answer to the previous question:
Consider the following substance descriptions. Does the evidence support that they are the same substances?
Substance 1: white, small, grainy, crystals
Substance 2: black, fine powder.
What is the best explanation for why this substance is the same or different?
The visual properties of the two substances are different.
They don't look the same so they are not the same.
They are the same because they are both small tiny pieces.
There is no way to determine if they are the same/different based on this information.
Are these two samples the same substance?
They are the same substances because they are both white powders.
They are the same substances because they both have similar atomic structures.
They are different substances because they have different atoms making them up.
They are the same because they both have the same number of atoms.
Select the FALSE definition for "Repeating groups of atoms"
Repeating atoms are atoms that replicate themself.
Repeating groups of atoms are substances made of the same group of atoms repeated over and over.
Molecules are groups of atoms that form specific groups that are each separate and can range in size from two atoms to thousands of atoms.
Extended structures are substances that in solid phase are made of many atoms or many groups of atoms that connect to form a large structures called crystals.
How often do chemists from a city's water department test the water supply?
every hour
every day
every week
every month
every year
Where did Dr. Yung (the chemist near Westfield) find the reddish-brown substance when she examined all the possible sources?
coming from the pipes into the houses
in the wells where the water comes from
in the ponds nearby the town
in all water everywhere in Westfield
When examining the following evidence, which is the best evidence we should use?
ugly color, solid
white, small pieces
white, small, grainy, crystals
Consider the following substance descriptions. Does the evidence support that they are the same substances?
Substance 1: white, small, grainy, crystals
Substance 2: black, fine powder.
YES
NO
Consider your answer to the previous question:
Consider the following substance descriptions. Does the evidence support that they are the same substances?
Substance 1: white, small, grainy, crystals
Substance 2: black, fine powder.
What is the best explanation for why this substance is the same or different?
The visual properties of the two substances are different.
They don't look the same so they are not the same.
They are the same because they are both small tiny pieces.
There is no way to determine if they are the same/different based on this information.
Are these two samples the same substance?
They are the same substances because they are both white powders.
They are the same substances because they both have similar atomic structures.
They are different substances because they have different atoms making them up.
They are the same because they both have the same number of atoms.
Select the FALSE definition for "Repeating groups of atoms"
Repeating atoms are atoms that replicate themself.
Repeating groups of atoms are substances made of the same group of atoms repeated over and over.
Molecules are groups of atoms that form specific groups that are each separate and can range in size from two atoms to thousands of atoms.
Extended structures are substances that in solid phase are made of many atoms or many groups of atoms that connect to form a large structures called crystals.
Why do different substances have different properties?
They are made of different groups of atoms.
They look different.
The same atoms can change their properties when needed.
There are different numbers of the repeating atom groups.
What is the reddish-brown substance in the water of Westfield?
Select the BEST answer.
The reddish-brown substance is the same as the substance that makes up the pipes.
The reddish-brown substance is the same substance as the fertilizer.
The reddish-brown substance is different from both the fertilizer and the pipes.
The reddish-brown substance is iron oxide or rust.
The tiny pieces that all matter--all the stuff in the world--is made of ...
atoms
protons
molecules
electrons
The temperature at which a substance changes from the liquid phase to the gas phase...
freezing point
melting point
boiling point
high temperature
A structure formed by repeating groups of atoms that link together in a large network...
extended structure
atoms
molecules
proteins
The temperature at which a substance changes from the solid phase to the liquid phase....
boiling point
meling point
liquid point
condensation point
An object, diagram, or computer program that helps us understand something by making it simpler or easier to see...
model
atom
simulator
experiment
A group of atoms joined together in a particular way...
molecule
atom
extended structure
property
Something that can be observed about a substance, such as color, smell, or boiling point...
property
chemistry
substance
molecule
The relative size of things...
Scale
Measurement
Molecule
Big and Small
Something that is made of all the same atoms or groups of atoms...
substance
atoms
chemical formula
molecule
Scientists can use properties to help them distinguish between different substances.
True
False
All properties used to distinguish substances can be found with visual observations.
True
False
