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Geography chapter 2

Question Answer
A _______ is a complete trip around the sun. revolution
Because the sun is so large, its gravity causes the planets to constantly _____ or move around it. orbit
an imaginary line the runs through the Earth's center from North-South Poles? axis
The thin layer of gases that envelop the Earth? atmosphere
First day of summer (June 21st) and the longest day of the year? solstice
Day of the year when daylight and night in both hemispheres are of equal length? equinoxes
The average weather conditions in a region over a long period of time? climate
Rain, snow, hail, sleet are all examples of ________ . precipitation
The seven large landmasses on Earth? continents
16 enormous moving pieces of the Earth's crust? tectonic plates
Movements of the Earth's crust along fault lines? earthquakes
A long narrow band of volcanoes in the Pacific Ocean stretching 24,000 miles? Ring of Fire
A giant wave caused by volcanic eruptions or mvt. under the ocean floor? Tsunami
Process by which the Earth's surface is worn away by forces such as wind, water and chemicals? weathering
Process by which weathered bits of rock are moved elsewhere by water, wind and ice? Erosion
The smallest of the ice masses that move slowly over time? glaciers
Plains that are flat, but rise above the surrounding land? plateau
A narrow strip of land connecting two larger land areas? isthmus
The process that separates minerals from salt water, making it usable and drinkable? desalinization
An area where sand, silt, clay or gravel is deposited at the mouth of a river? delta
The process that keeps the Earth's water supply in balance? water cycle
Process where liquid water on the Earth's surface to change into water vapor? evaporation
A deadly mixture of poisonous gases that combine with water vapor in the air? acid rain
Name the 3 layers of the Earth crust, mantle and core
Place where the Earth's crust is thinnest? ocean floor
Name the 7 continents. NA, SA, Europe, Africa, Asia, Australia, and Antarctica
Length of time for the Earth to make one revolution? 365.25 days
About _____% of the Earth's surface is made of water? 71%
At what degree is the Earth tilted? 23 1/2 degrees
Two places on Earth that receive the most direct sunlight? Tropic of Cancer and Tropic of Capricorn
Reason for the Earth's 4 seasons? Tilt of the Earth
Winter in the Southern hemisphere is what season in the northern hemisphere? Summer
Name 4 factors that influence an area's climate. latitude, elevation, landforms and wind and ocean currents
How does elevation affect and area's climate? 3.5 degrees cooler /1,000 feet
There are ____ main climate zones found throughout the world. 6
What climate region are we in? Humid continental
List 2 things that are causing changes to climate. logging/deforestation, large cities and global warming/CO2
Name a fact about our Earth. 93million miles away, 25,000 miles around, only planet with oxygen,
Name the 4 physical systems of the Earth Lithosphere, atmosphere, biosphere, and hydrosphere.
Number of tectonic plates? 16
Process that causes the tectonic plates to move? convection
An example of a sudden change to the Earth? earthquake, volcanoes, tsunami…
Give an example of mechanical weathering? tree roots, and frost wedging
3 processes of erosion? wind, water, and ice (glaciers)
Which of the following process of erosion cause the most change? water
Humans have changed the environment of Earth faster in the past 50 years than at any time in history? true
The 6 climate zones of the world are based primarily on what two things? temperature and precipitation
What is the purpose of a "leap year", and on what date does it happen? keep the calendar accurate…Feb. 29th
Most of the Earth's landforms are/were created by external forces? False…internal forces
List a way that humans have changed the surface of the Earth. canals, damns, mining, logging, highways, pollution…