The atmosphere questions

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The atmosphere question collection

Review The atmosphere questions for Chemistry, with correct answers shown and coverage across composition and evolution of the atmosphere; greenhouse gases and climate change; air pollutants.

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Question 1

Which gas is most abundant in Earth's atmosphere today?
  1. Nitrogen
  2. Oxygen
  3. Carbon dioxide
  4. Argon only in traces

Question 2

Roughly what percentage of Earth's atmosphere is oxygen?
  1. About \(21\%\)
  2. About \(78\%\)
  3. About \(50\%\)
  4. Less than \(1\%\)

Question 3

Which gas is a major greenhouse gas?
  1. Carbon dioxide
  2. Nitrogen
  3. Helium
  4. Neon

Question 4

What is the greenhouse effect?
  1. Warming caused when greenhouse gases absorb and re-radiate infrared radiation
  2. Cooling caused when ozone reflects all sunlight
  3. Heating from UV only with no gases involved
  4. Only local warming inside cities

Question 5

Which human activity is a major source of extra carbon dioxide?
  1. Burning fossil fuels
  2. Condensation of water vapor
  3. Earthquakes only
  4. Planting trees

Question 6

What is a fossil fuel?
  1. A fuel formed from ancient organic material over millions of years
  2. Any fuel made from metal ores
  3. A fuel made only in laboratories
  4. A fuel that contains no carbon

Question 7

Which of these is a fossil fuel?
  1. Natural gas
  2. Hydrogen
  3. Bioethanol
  4. Solar energy

Question 8

How does photosynthesis affect atmospheric carbon dioxide?
  1. It removes carbon dioxide from the air
  2. It releases carbon dioxide as the main product
  3. It has no effect on carbon dioxide
  4. It only affects oxygen at night

Question 9

Which process returns carbon dioxide to the atmosphere?
  1. Respiration
  2. Photosynthesis
  3. Condensation
  4. Filtration

Question 10

The carbon cycle describes?
  1. How carbon compounds move between air, oceans, living things and rocks/fuels
  2. Only how carbon forms diamonds
  3. Only carbon movement in volcanoes
  4. How oxygen cycles through metals only

Question 11

Why can deforestation increase atmospheric carbon dioxide?
  1. Fewer trees are available to absorb carbon dioxide by photosynthesis
  2. Trees mainly release oxygen and carbon dioxide equally at all times
  3. Cut trees absorb more carbon dioxide than living trees
  4. Deforestation only affects nitrogen levels

Question 12

What is acid rain mainly caused by?
  1. Sulfur dioxide and nitrogen oxides dissolving in rainwater
  2. Carbon monoxide dissolving in rainwater only
  3. Pure oxygen in clouds
  4. Helium from balloons

Question 13

What is one environmental effect of acid rain?
  1. Damage to lakes, soil and stone buildings
  2. Increased ozone layer thickness only
  3. More nitrogen in clean air
  4. Lower sea level immediately

Question 14

Particulate pollutants can mainly cause?
  1. Respiratory health problems
  2. Faster photosynthesis in all plants
  3. Permanent increase in oxygen percentage
  4. No effect on health

Question 15

Why are catalytic converters fitted to many petrol cars?
  1. To reduce harmful exhaust gases like carbon monoxide and nitrogen oxides
  2. To increase sulfur dioxide emissions
  3. To make fuel burn at a lower temperature only
  4. To produce oxygen from nitrogen

Question 16

How can renewable energy help reduce greenhouse gas emissions?
  1. It can generate electricity with less carbon dioxide from fuel combustion
  2. It always releases more carbon dioxide than coal
  3. It removes all greenhouse gases instantly
  4. It increases methane from all sources

Question 17

Which statement about Earth's early atmosphere is most accurate?
  1. It likely had very little oxygen and more carbon dioxide than today
  2. It had more oxygen than today from the start
  3. It was mostly helium and neon
  4. Its composition has never changed

Question 18

What increased oxygen levels in Earth's atmosphere over geological time?
  1. Photosynthetic organisms such as algae and plants
  2. Combustion of fossil fuels
  3. Thermal decomposition of limestone
  4. Industrial catalytic converters

Question 19

Which equation represents complete combustion of methane?
  1. \(\mathrm{CH}_{4} + 2\mathrm{O}_{2} \to \mathrm{CO}_{2} + 2\mathrm{H}_{2}\mathrm{O}\)
  2. \(\mathrm{CH}_{4} + \mathrm{O}_{2} \to \mathrm{CO} + \mathrm{H}_{2}\)
  3. \(\mathrm{CH}_{4} \to \mathrm{C} + 2\mathrm{H}_{2}\)
  4. \(2\mathrm{CH}_{4} + \mathrm{O}_{2} \to 2\mathrm{CO}_{2} + 2\mathrm{H}_{2}\mathrm{O}\)

Question 20

A student says "greenhouse gases are always pollutants". What is the best response?
  1. Some greenhouse effect is natural and necessary, but increasing levels can cause climate change
  2. All greenhouse gases are man-made and unnecessary
  3. Greenhouse gases have no effect on temperature
  4. Only oxygen is a greenhouse gas

Question 21

Which gas makes up most of the Earth's atmosphere today?
  1. Nitrogen
  2. Oxygen
  3. Carbon dioxide
  4. Argon

Question 22

Roughly what percentage of the atmosphere is oxygen?
  1. About \(21\%\)
  2. About \(78\%\)
  3. About \(50\%\)
  4. About \(1\%\)

Question 23

What is thought to have been a major source of gases in Earth's early atmosphere?
  1. Volcanic activity
  2. Combustion engines
  3. Photosynthesis from forests
  4. Nuclear power stations

Question 24

Compared with today, Earth's early atmosphere likely had?
  1. Much less oxygen and more carbon dioxide
  2. More oxygen and less carbon dioxide
  3. No nitrogen at all
  4. Only noble gases

Question 25

How did oxygen levels in the atmosphere increase over time?
  1. Photosynthetic algae and plants released oxygen
  2. Volcanoes released oxygen directly
  3. Combustion of fossil fuels increased oxygen
  4. Oxygen formed from nitrogen without reactions

Question 26

What is the greenhouse effect?
  1. Warming when greenhouse gases absorb and re-radiate infrared radiation
  2. Cooling due to ozone blocking all sunlight
  3. Heating only from UV radiation with no gases involved
  4. Heat from the Earth escaping faster into space

Question 27

Which gas is a major greenhouse gas produced by complete combustion of hydrocarbons?
  1. Carbon dioxide
  2. Nitrogen
  3. Hydrogen
  4. Argon

Question 28

Which gas is mainly produced by incomplete combustion of fuels?
  1. Carbon monoxide
  2. Oxygen
  3. Nitrogen dioxide
  4. Sulfur trioxide

Question 29

Why is carbon monoxide dangerous?
  1. It reduces the blood's ability to carry oxygen
  2. It rapidly increases oxygen in blood
  3. It is non-toxic in enclosed spaces
  4. It only affects metals, not people

Question 30

Which pollutants are major causes of acid rain?
  1. Sulfur dioxide and nitrogen oxides
  2. Carbon dioxide and methane
  3. Oxygen and nitrogen
  4. Hydrogen and chlorine

Question 31

What is a major environmental effect of acid rain?
  1. Damage to ecosystems and stone buildings
  2. Increased soil pH everywhere
  3. Instant increase in global oxygen
  4. Formation of only harmless salts

Question 32

Particulate matter from diesel engines is linked to which health problem?
  1. Respiratory health problems
  2. Improved lung function
  3. No measurable health effects
  4. Reduced cardiovascular risk

Question 33

What do catalytic converters mainly do?
  1. Reduce emissions of carbon monoxide, nitrogen oxides and unburned hydrocarbons
  2. Increase sulfur dioxide emissions
  3. Produce oxygen directly from nitrogen
  4. Remove carbon dioxide completely from exhaust

Question 34

What is a carbon footprint?
  1. The total greenhouse gas emissions caused directly and indirectly by an activity or product
  2. The mass of carbon in one human foot
  3. Only emissions from cars
  4. Only emissions from electricity generation

Question 35

Which action can reduce an individual's carbon footprint?
  1. Using less fossil-fuel energy and improving efficiency
  2. Burning more coal at home
  3. Driving more short trips in traffic
  4. Leaving appliances on continuously

Question 36

What is a limitation when predicting future climate change?
  1. Climate systems are complex and projections include uncertainty
  2. No climate data exists
  3. Atmospheric composition never changes
  4. Computer models cannot use measurements

Question 37

What does the carbon cycle include?
  1. Processes that move carbon between atmosphere, oceans, rocks and living organisms
  2. Only carbon in fossil fuels
  3. Only photosynthesis and no other processes
  4. Only carbon dioxide dissolved in rain

Question 38

Which equation represents complete combustion of methane?
  1. \(\mathrm{CH}_{4} + 2\mathrm{O}_{2} \to \mathrm{CO}_{2} + 2\mathrm{H}_{2}\mathrm{O}\)
  2. \(\mathrm{CH}_{4} + \mathrm{O}_{2} \to \mathrm{CO} + \mathrm{H}_{2}\)
  3. \(\mathrm{CH}_{4} + \mathrm{O}_{2} \to \mathrm{C} + 2\mathrm{H}_{2}\mathrm{O}\)
  4. \(2\mathrm{CH}_{4} + \mathrm{O}_{2} \to 2\mathrm{CO}_{2} + 2\mathrm{H}_{2}\mathrm{O}\)

Question 39

Which statement about methane as a greenhouse gas is correct?
  1. Methane is a greenhouse gas and contributes to climate change
  2. Methane has no effect on infrared radiation
  3. Methane is not released by human activity
  4. Methane is always converted to oxygen immediately

Question 40

Why is reducing sulfur content in fuels beneficial?
  1. It reduces sulfur dioxide emissions and acid rain
  2. It increases carbon monoxide formation
  3. It raises nitrogen oxide emissions
  4. It removes the need for catalytic converters

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Review The atmosphere questions for Chemistry, with correct answers shown and coverage across composition and evolution of the atmosphere; greenhouse gases and climate change; air pollutants.

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