Climate & atmosphere Flashcards
Weather
Local, short-term conditions in an area; time scale of seconds to days
Climate
Average weather in an area over a long period of time; defined by temperature & percipitation
6 factors that affect the distribution of heat and precipitation
unequal heating of the Earth, atmospheric covection currents, the rotation of the Earth, Earth’s orbit around the sun on a tilted axis, ocean currents, topography
Which of the following is the description of a region’s climate?
A. The amount of rainfall that an area receives over a period of 1 year
B. The average precipitation over a 1-2 year time period
C. The average high temperature of a region
D. The average temperature and precipitation over several decades
E. The average temperature and rainfall over a period of 1-2 years
D
The atmosphere is 78% nitrogen but it is in a form we are unable to utilize. Describe how we are able to convert nitrogen gas (N2) into a more useable form.
There are bacteria in the soil that can take the nitrogen present in air and turn it into ammonia or nitrate. These forms of nitrogen can be absorbed by plants. After plants absorb them, using them for genes and other uses for nitrogen, they get eaten by animals. Those animals then inherit some of that nitrogen, which they can use for themselves. We get nitrogen by eating plants and animals.
Why does the density of air vary throughout the atmosphere?
Earth’s gravity pulls the molecules toward the Earth’s surface
Which layer of the atmosphere is most of Earth’s air mass found in?
The troposphere; has 75-80% of all the air mass
Troposphere
The layer of atmosphere closest to the Earth’s surface
Which layer of the atmosphere does most of the weather we experience occur in?
The troposphere
What are the layers of the atmosphere based on?
Differences in temperature as altitude increases
Why is the troposphere warmer at sea level?
Because of radiation from earth and objects on it
Stratosphere
The layer with high concentration of ozon; also known as the ozone layer
Why is the ozone layer essential to life?
It protects us from deadly UV rays from the sun
Mesosphere
Above the stratosphere; coldest layer of the atmosphere
Thermosphere
Layer above the mesosphere; sometimes broken down into ionsphere (an area of highly charged particles where auroras occur) and ionsphere (most satellites orbit here)