Gr 9 NATURAL SCIENCES: CH 4.4 The greenhouse effect

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

What is the primary function of greenhouse gases in the Earth's atmosphere?

  • To reflect sunlight away from the Earth's surface
  • To create a vacuum in the atmosphere
  • To cool the Earth's surface by emitting cold air
  • To absorb and re-emit infrared radiation, warming the Earth's surface (correct)

Which of the following is NOT a source of carbon dioxide (CO₂)?

  • Industrial processes
  • Combustion of fossil fuels
  • Evaporation of water on Earth's surface (correct)
  • Respiration

What is the result of the extreme greenhouse effect on Venus?

  • Very low surface temperatures
  • High surface temperatures (correct)
  • No atmosphere at all
  • A balanced atmosphere with a moderate temperature

What is the primary component of the Earth's atmosphere?

<p>Nitrogen (78.08%) (C)</p> Signup and view all the answers

What is the main reason why the Earth's surface is not too cold to support life?

<p>The greenhouse effect (A)</p> Signup and view all the answers

What is the primary source of methane (CH₄)?

<p>Decomposition of organic matter (C)</p> Signup and view all the answers

What is the result of the little greenhouse effect on Mars?

<p>Cold surface temperatures (A)</p> Signup and view all the answers

What is the main effect of the greenhouse gases on Earth's climate?

<p>To maintain a moderate climate suitable for life (D)</p> Signup and view all the answers

What is the main cause of global warming?

<p>Increase in the levels of greenhouse gases (C)</p> Signup and view all the answers

What is climate change?

<p>Long-term changes in temperature, precipitation, and other atmospheric conditions (D)</p> Signup and view all the answers

What is the main consequence of melting polar ice?

<p>Rise in sea levels and flooding of low-lying areas (B)</p> Signup and view all the answers

What is the main impact of altered weather patterns on agriculture?

<p>Decrease in crop yields (D)</p> Signup and view all the answers

What is the main consequence of long-term climate change on biodiversity?

<p>Increase in species extinction (C)</p> Signup and view all the answers

What is the main method used by scientists to track CO₂ levels over thousands of years?

<p>Ice core samples, historical climate data, and current atmospheric measurements (A)</p> Signup and view all the answers

What is the main conclusion of investigating CO₂ levels?

<p>Understanding the greenhouse effect and human impact on greenhouse gas levels is crucial for addressing global warming and mitigating climate change (B)</p> Signup and view all the answers

What is the primary difference between the greenhouse effect on Venus and Mars?

<p>The thickness of the atmosphere (B)</p> Signup and view all the answers

What is the role of water vapour in the greenhouse effect?

<p>It absorbs and re-emits infrared radiation (C)</p> Signup and view all the answers

What is the effect of the greenhouse effect on the Earth's surface temperature?

<p>It warms the surface temperature (A)</p> Signup and view all the answers

What would be the consequence of the Earth's atmosphere having no greenhouse gases?

<p>The Earth would be too cold to support life (B)</p> Signup and view all the answers

What is the primary component of the atmospheres on Mars and Venus?

<p>Carbon dioxide (D)</p> Signup and view all the answers

What is the sequence of events in the greenhouse effect?

<p>Sun's radiation, absorption, infrared radiation (A)</p> Signup and view all the answers

Why is the Earth's atmosphere able to support life?

<p>Due to the balance of greenhouse gases (D)</p> Signup and view all the answers

What is the primary cause of the increase in Earth's average surface temperature?

<p>Rising levels of greenhouse gases (B)</p> Signup and view all the answers

Which human activity has significantly contributed to the increase in CO₂ levels?

<p>Burning of fossil fuels (A)</p> Signup and view all the answers

What is the consequence of melting polar ice on low-lying areas?

<p>Flooding and coastal erosion (B)</p> Signup and view all the answers

What is the impact of altered weather patterns on food production?

<p>Decreased crop yields and food production (C)</p> Signup and view all the answers

What is the long-term consequence of climate change on biodiversity?

<p>Increased extinction rates (B)</p> Signup and view all the answers

What is the purpose of using ice core samples in climate research?

<p>To track CO₂ levels over thousands of years (D)</p> Signup and view all the answers

What is the significance of understanding the greenhouse effect and human impact on greenhouse gas levels?

<p>To mitigate the effects of global warming and climate change (C)</p> Signup and view all the answers

What is the primary goal of investigating CO₂ levels?

<p>To determine the impact of human activities on CO₂ levels (D)</p> Signup and view all the answers

What is the primary difference between global warming and climate change?

<p>Global warming refers to the increase in Earth's average surface temperature, while climate change refers to long-term changes in atmospheric conditions (C)</p> Signup and view all the answers

Which human activity has contributed the most to the increase in CO₂ levels since the industrial revolution?

<p>Burning of fossil fuels (B)</p> Signup and view all the answers

What is the primary reason why scientists investigate CO₂ levels over thousands of years?

<p>To determine the impact of human activities on CO₂ levels (D)</p> Signup and view all the answers

What is the consequence of altered weather patterns on crop yields?

<p>Decreased crop yields due to changed precipitation patterns (C)</p> Signup and view all the answers

What is the primary consequence of long-term climate change on biodiversity?

<p>Extinction of species unable to adapt (D)</p> Signup and view all the answers

What is the primary role of the greenhouse effect in maintaining a moderate climate?

<p>Regulating Earth's average surface temperature (C)</p> Signup and view all the answers

What is the primary evidence used to support the idea that human activities are contributing to global warming?

<p>Ice core samples and historical climate data (B)</p> Signup and view all the answers

What is the primary goal of addressing global warming and climate change?

<p>To maintain a moderate climate suitable for life (B)</p> Signup and view all the answers

Which of the following processes does NOT contribute to the formation of methane (CH₄) in the atmosphere?

<p>Combustion of fossil fuels (B)</p> Signup and view all the answers

What is the primary reason why the Earth's surface temperature is not as cold as Mars?

<p>The Earth's atmosphere has a balanced mix of greenhouse gases (D)</p> Signup and view all the answers

What is the main difference between the Earth's atmosphere and that of Venus?

<p>The Earth's atmosphere has a balanced mix of greenhouse gases, while Venus' atmosphere is mostly CO₂ (B)</p> Signup and view all the answers

What would be the consequence of the Earth's atmosphere having no greenhouse gases?

<p>The Earth's surface temperature would be extremely cold (C)</p> Signup and view all the answers

What is the primary role of infrared radiation in the greenhouse effect?

<p>It is absorbed and re-emitted by greenhouse gases (C)</p> Signup and view all the answers

What is the main similarity between the Earth's atmosphere and that of Mars?

<p>Both have a thin atmosphere (C)</p> Signup and view all the answers

What is the primary difference between the Earth's surface temperature and that of Venus?

<p>The Earth's surface temperature is lower than Venus' (C)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser