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Worksheetssummary
Total questions: 67
Worksheet time: 4hrs 46mins
Catalysts permit reactions to proceed along a ___________energy path.
lower
higher
magnetic
psycho's
Smaller particle size allows for a _________ surface area to be exposed for the reaction.
larger
smaller
rectangular
spherical
Increasing the ____ causes the particles (atoms
or molecules) of the reactants to move more quickly so that
they collide with each other more frequently and with more
energy.
Catalyst
Surface Area
Temperature
Concentration
________ is the measure of how much area of an
object is exposed.
Surface Area
Catalyst
Temperature
Concentration
Grains of sugar have a greater _______ than a solid cube of
sugar of the same mass, and therefore will dissolve quicker in water.
Surface Area
Catalyst
Temperature
Concentratrion
Pick the TWO (2) options that will INCREASE the rate of a reaction.
Reducing Heat
Adding Catalyst
Adding Heat
Removing Catalyst
Which of the following will lower the rate
of reaction?
adding an enzyme to the reaction
decreasing the temperature from 40°C to
10°C
breaking a chunk of calcium up into
smaller pieces
increasing the amount of solute
dissolved in a solution
Choose the best description below for the image
physical change
chemical change
Choose the best description below for the image
physical change
chemical change
What kind of change occurs if matter changes in amount, size, or shape?
substance change
chemical change
physical change
elemental change
Which use of iron is due to its chemical properties?
producing colored sparks in fireworks
changing from liquid to gas at 2,862°C
conducting electricity and heat
changing from solid to liquid if heated to 1,538°C
1) True or False: Intensive Properties change as the amount of substance changes.
True
False
Flammability - how easily something combusts
chemical property
intensive physical property
extensive physical property
Freezing point - the temperature at which a substance changes from a liquid to a solid
chemical property
intensive physical property
extensive physical property
Chemical changes involve
Formation of a new substance
change in size
physical change
None of the choices
When hydrogen reacts with oxygen
CO2 is produced
water is produced
no reaction occurs
energy remains the same
What is a chemical reaction?
A physical change in the state of matter
A process that only involves the rearrangement of atoms
A process in which substances undergo a change in composition and produce new substances
A change in color or odor of a substance
The substances that are written before the arrow in a chemical equation are
Reactants
Inert
Explosives
Producats
The substances produced as a result of a chemical reaction
Reactants
Catalyst
Products
Coefficients
Did a chemical change take place?
yes
no
Did a chemical change take place?
yes
no
Did a chemical change take place?
yes
no
Did a chemical change take place?
yes
no
Did a chemical change take place?
yes
no
How many carbon atoms are present on the reactant side? C2 + O2 ⇢ CO2
0
1
2
3
Fe + S --> FeS
Example: H2
A ___________________ uses chemical formulas, plus signs, and an arrow to represent a chemical reaction
chemical formula
chemical equation
element symbol
inventory
What is the correct "inventory" for KClO3
K = 1 Cl = 3 O = 3
K = 3 Cl = 3 O = 3
K = 1 Cl = 1 O = 3
K = 1 C = 1 l = 1 O = 3
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
Chemical equation
Formula equation
Coefficient
Chemical reactions are described by chemical equations.
True
False
A chemical equation represents, with :
symbols and formulas
only symbols
formulas and words
Select the indicators of chemical reactions
emission of light
emission of heat
formation of gas
formation of precipitate
formation of fire
To balance numbers of atoms, add coefficients where necessary.
True
False
What is a natural resource?
a resource that occurs in nature without human intervention
a resource that is human-made
What is a synthetic resource?
a resource made by humans from natural materials
naturals resources such as trees and water
Which is an example of a natural resource?
pencils
paper
books
trees
What is an example of a synthetic resource?
plants
potatoes
potato chips
Cows
Natural
Synthetic
Fried Chicken
Natural
Synthetic
Gummy Bears
Natural
Synthetic
Plastic Water Bottles
Natural
Synthetic
Orange
Natural
Synthetic
Which of the following is a non-renewable resource?
Fossil fuels
Water
Wood
Chickens
According to the article how are synthetic materials made
in a factory
in a lab
by combining different atoms and molecules found in nature
Man made materials and substances that do not exist naturally in the environment are known as:
nonrenewable products
synthetic products
systematic products
none of these answers are correct
What are the two kinds of natural resources?
renewable and infinite
renewable and noninfinite
nonrenewable and finite
nonrenewable and renewable
Natural gas and crude oil are
renewable resources
synthetic products
fossil fuels
infinite fuels
Which of the following natural resources are non-renewable?
Water
Animals
Natural gas
Wind
This type of renewable energy converts the power of the wind to electricity.
steam engines
solar power
wind turbines
nuclear power
Which of the following is a Renewable Natural Resource?
Crops
Nuclear
Gasoline
Electricity
Which renewable resource gets its direct energy from the sun?
Geothermal
Solar
Wind
Hydrogen
What are some advantages of synthetic materials?
Cheaper to manufacture
Stronger than similar products made from natural material
Often better quality
All of the above
What is the difference between a natural and synthetic material?
Natural material is made from chemicals and synthetic is made from nature
Natural material is made directly from nature and synthetic material is made from chemicals
Natural material is made from petroleum and synthetic material is made from wool
Natural material is made from trees and synthetic materials are made from plastics
