Chapter 7 Quiz Flashcards
What is the atmosphere?
Layer of gases that surround a planet or moon that protect from extreme temperatures
What is the most important factor that affects climate on earth?
Energy from the sun
What are 3 types of movement changes?
Eccentricity- change in orbit
Tilt - angle changes
Wobble - wobbles as it rotates on axis (precession)
How do the sun’s rays strike earth?
Perpendicular to the earth’s surface
What is the atmosphere mainly composed of?
Nitrogen and oxygen
What is the greenhouse effect?
Natural warming caused by when gases in atmosphere absorb thermal energy
Keeps earth temp. in check
What is wind?
Movement of air from high to low pressure
Result in uneven heating of earth surface
What are prevailing winds?
What are jet streams?
Prevailing - blow in constant direction
Jet stream - high altitude winds, travel fast at high speeds
What is the hydrosphere?
The collective mass of water found anywhere on earth in liquid gas or solid form
What can the ocean do better than the atmosphere?
Oceans can hold more heat, known as heat reservoirs
What is specific heat capacity?
The amount of heat required to raise the temp of one gram of a substance by 1 degree Celsius
What is the albedo effect?
Which colours have a greater albedo?
How efficient is water at reflecting sun?
Albedo - fraction of energy reflected by a surface
Lighter colours reflect heat, don’t absorb
Water is 7% efficient, ice and snow 80-90
What are tectonic plates?
How many does earth have?
Piece of earth’s outer shell (lithosphere) moves around underlying rock (asthenosphere)
12 plates
Thai results in continent shapes changing
What do volcanic eruptions spew?
What affect do aerosols have on climate?
Ash and aerosols
Aerosols reflect solar radiation and thus have a cooling affect on global climate
Definition of anthropogenic?
Caused by humans, ex. the Industrial revolution that begun in the 1700s and required fossil fuel powered technologies