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WorksheetsModule 1 Assessment
Total questions: 24
Worksheet time: 20mins
What is the chemical formula for methane?
CH4
CO2
H2O
O2
Which molecule is a product of the combustion of methane?
Methane (CH4)
Oxygen (O2)
Water (H2O)
Helium (He)
What is the role of oxygen in the combustion of methane?
It is a product.
It is a reactant.
It is a catalyst.
It is an inhibitor.
Which fuel source, gasoline or diesel, would produce the most carbon dioxide when it combusts?
Gasoline
Diesel
Both produce the same amount
Neither produce carbon dioxide
How many bonds can the element NITROGEN make?
1
3
4
2
How many bonds can the element Magnesium make?
1
2
4
6
Here is the chemical equation for the combustion of methane. Why is it that Oxygen gas molecules CANNOT form any other way? HINT: Talk about bonds.
Oxygen gas can exist as O3 due to single bonds between atoms.
Oxygen gas molecules can only form as O2 due to the need for double bonds between oxygen atoms for stability.
Actually, Oxygen gas can form with just one bond
Oxygen molecules can form as O2 and O4 because of triple bonds.
Here is the chemical equation for the combustion of methane. Why is it that Methane molecules CANNOT form any other way? HINT: Talk about bonds.
This is not true - Methane molecules can exist without any bonds at all.
A carbon atom can bond 4 times, and hydrogen can bond 1 time
Methane can form through ionic bonds between carbon and hydrogen.
Methane can be formed by mixing carbon and oxygen without any bonds.
Combustion-powered (e.g., gas and diesel) cars are contributing to human-caused
climate change. Use evidence from your experiences in class and your background knowledge to support the claim. Be sure to clearly state your reasoning for why the evidence supports the claim. 3+ sentences.
As we move from left to right on the periodic table, the electrons...
increase by one proton
decrease by one electron
remain the same
increase by one neutron
The article What is Exhaust mentions three gases emitted from vehicle exhaust. Which of these is NOT one of them?
Carbon dioxide (CO2): A greenhouse gas contributing to climate change.
Carbon monoxide (CO): A toxic gas resulting from incomplete combustion, harmful to humans.
Nitrogen oxides (NOx): Contributes to smog and is produced during combustion processes.
Dihydrogen monoxoide (H2O) Contributes to drowning
How have advancements in technology and government policies contributed to the reduction of car exhaust emissions? Provide specific examples from the What is Exhaust article in 3+ sentences.
Based on the article WHAT IS EXHAUST, what are some of the harmful effects of exhaust emissions on public health, and which specific health problems are mentioned? 2+ sentences
Why is there carbon in fossil fuels? Where did fossil fuels come from?
Fossil fuels are formed from the decomposition of modern waste materials.
Fossil fuels are created from volcanic activity and lava.
Fossil fuels are made from minerals found in the earth's crust.
Fossil fuels contain carbon because they are from plants and animals that underwent transformation under heat and pressure over millions of years.
WHY does burning fossil fuels put carbon into the atmosphere?
Fossil fuels contain high amounts of nitrogen
The combustion process breaks down carbon compounds into gas
Burning fossil fuels creates new carbon atoms
Fossil fuels absorb carbon from the air when burned
What chemical is primarily formed when carbon from fossil fuels combines with oxygen during combustion?
carbon dioxide
sulfur dioxide
methane
carbon monoxide
What are the small fluctuations in the Mauna Loa graph?
Daily temperature changes at Mauna Loa
Long-term trends in global warming
Volcanic activity affecting CO2 levels
Seasonal variations in atmospheric CO2 levels.
What does the Mauna Loa graph show us?
The Mauna Loa graph shows the rising levels of atmospheric carbon dioxide.
The Mauna Loa graph shows the falling levels of atmospheric carbon dioxide.
The Mauna Loa graph displays the number of volcanic eruptions per year.
The Mauna Loa graph shows the average temperature of the ocean.
CH +O2 --> H2O + CO2
Decomposition
Double replacement
Combustion
Single Replacement
Which of these chemical equations for combustion of methane is BALANCED?
CH4 + 3 O2 -> 2 CO2 + 2 H2O
CH4 + O2 -> CO2 + H2O
CH4 + 2 O2 -> CO2 + 2 H2O
2 CH4 + O2 -> 2 CO2 + H2O
What three things are REQUIRED for a combustion reaction? SELECT ALL!
HydroCarbon
Water
Oxygen
Heat
A chemical catalyst
Which one of the following is combustible?
Iron nail
Glass
Stone pieces
Paper
What are the PRODUCTS of combustion?
Oxygen (O2) and nitrogen (N2)
Methane (CH4) and sulfur dioxide (SO2)
Carbon dioxide (CO2) and water (H2O) are the main products of combustion.
Hydrogen (H2) and ammonia (NH3)
What are the REACTANTS of combustion?
Water and carbon dioxide
Nitrogen and hydrogen
Methane and sulfur
Fuel and oxygen
