Impact of Environmental Conditions on Fuel Characteristics

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the role of fire in ecology?

  • Create barren and lifeless areas
  • Increase populations and stabilize communities
  • Disturb populations and move communities (correct)
  • Prevent colonization in habitats

When considering ecological succession, what is the difference between primary and secondary succession?

  • Primary is faster than secondary
  • Primary occurs after a forest fire, secondary occurs after a flood
  • Primary leads to barren lands while secondary leads to lush forests
  • Primary involves the first colonization of a barren area, secondary recognizes a habitat after a disturbance (correct)

What is the definition of ecology?

  • The study of weather patterns and climate change
  • The study of interactions between plants and animals in an ecosystem
  • The study of combustion reactions
  • The study of interactions between abiotic and biotic factors in the environment (correct)

What is combustion and its main characteristic according to the text?

<p>A high-temperature exothermic redox reaction that produces heat and sometimes light (D)</p> Signup and view all the answers

Which statement best describes the interaction between oxygen, heat, and fuel in the fire triangle?

<p>Oxygen, heat, and fuel must all be present for fire to ignite (B)</p> Signup and view all the answers

Which material is more likely to create flames according to the text?

<p>Dry grasses (B)</p> Signup and view all the answers

What is the significance of the Haines Index in predicting large fire growth?

<p>It indicates the potential for large fire growth based on air dryness and intensity. (C)</p> Signup and view all the answers

In the context of fire behavior, what does Fireline Intensity measure?

<p>The intensity of heat released per unit length of fire line per unit time. (A)</p> Signup and view all the answers

Which weather condition contributes to more violent fire behaviors like fire whirls?

<p>Air temperature exceeding 85F and wind speed greater than 10mph. (C)</p> Signup and view all the answers

What does the term 'fire regime' refer to in relation to wildfires?

<p>The spatiotemporal patterns and impacts of fire on an ecosystem. (C)</p> Signup and view all the answers

What factor is used to determine the Freyancy in describing a fire regime?

<p>The time interval between successive fires affecting a specific spot. (A)</p> Signup and view all the answers

'Intensity' in fire behavior refers to what aspect of a fire?

<p>The total energy released per unit time by a fire. (A)</p> Signup and view all the answers

How does a north facing slope impact fuel conditions?

<p>Less sunlight and cooler temperatures (B)</p> Signup and view all the answers

What is the impact of elevation on fuel characteristics?

<p>Higher elevation leads to lighter fuels and lower ignition potential (A)</p> Signup and view all the answers

How does a ridge affect the rate of fire spread?

<p>Slows down the rate of spread by blocking wind (A)</p> Signup and view all the answers

What is the impact of a saddle on fire behavior?

<p>Speeds up winds and worsens the fire (C)</p> Signup and view all the answers

How does fuel state differ from fuel type?

<p>Fuel type relates to macromolecules, while fuel state pertains to moisture content (B)</p> Signup and view all the answers

What characteristic influences the rate of fire spread based on fuel type?

<p>Size and shape of fuel components (A)</p> Signup and view all the answers

What is the main factor that determines the beginning of the combustion process?

<p>Heat (B)</p> Signup and view all the answers

During the pre-ignition phase, what type of reaction occurs when energy is absorbed?

<p>Endothermic Reaction (A)</p> Signup and view all the answers

Which type of plant, appearing about 473 million years ago, were non-vascular and required proximity to water?

<p>First land plants (A)</p> Signup and view all the answers

What is the key factor that led to the ability of plants to evolve and spread further from water sources?

<p>Lignin in plants (D)</p> Signup and view all the answers

Approximately how many years ago did the Earth accumulate about 21% oxygen in its atmosphere?

<p>1.9 billion years ago (A)</p> Signup and view all the answers

Which type of fire behavior characteristic refers to the distance the fire has moved away from its origin?

<p>Perimeter growth (D)</p> Signup and view all the answers

What is the term used for the manner in which heat is transferred through direct contact, warming substances straight from the sun or fire?

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

'Flaming', 'Smoldering', and 'Glowing' are associated with which phase of combustion?

<p>'Post-ignition' (D)</p> Signup and view all the answers

'Surface', 'Crown', and 'Ground' are types of which element in understanding fire behavior?

<p>'Wildland fire' (B)</p> Signup and view all the answers

What is the key factor influenced by topography that affects fire behavior due to its variability across space and time?

<p>Slope steepness/position (C)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Related Documents

Fire Exam 1.docx

More Like This

Use Quizgecko on...
Browser
Browser