1.
Force exerted on an area is called _____. (1 point)
pressure
temperature
gravity
mass
2.
The composition of the atmosphere is changing due to _____. (1 point)
smog
ozone depletion
increase in CO2 (carbon dioxide)
all of the above
3.
The _____ is the layer of the atmosphere farthest from Earth's surface. (1 point)
exosphere
troposphere
stratosphere
ionosphere
4.
Chlorofluorocarbons harm the ozone layer by _______. (1 point)
adding more ozone molecules
blocking ultraviolet radiation
destroying ozone molecules
destroying oxygen molecules
5.
Air pressure is greatest _____ because there are _____ molecules of air pushing down from above. (1 point)
at the top of a mountain; more
at sea level; more
in the troposphere; less
in the exosphere; less
1. a
2. d
3. a
4. c
5. b
1. a
2. c
3. a
4. b
5. i don't know : (
you go to a virtual online scool don't u i see yall be cheating you must go to connections acadamy
1. The force exerted on an area is called "pressure." To understand this concept, you can think of pressure as the amount of force distributed over a certain area. To calculate pressure, you divide the force applied by the area it is acting upon. So, if you want to find the force exerted on an area, you can use the formula: force = pressure x area.
2. The composition of the atmosphere is changing due to several factors, including smog, ozone depletion, and an increase in CO2 (carbon dioxide). Smog refers to a type of air pollution caused by a mix of pollutants, mainly from vehicle emissions and industrial activities. Ozone depletion refers to the loss of ozone molecules in the Earth's ozone layer, primarily caused by the release of certain chemicals like chlorofluorocarbons (CFCs). Increase in CO2 refers to the rising levels of carbon dioxide in the atmosphere, primarily due to human activities such as burning fossil fuels. All of these factors contribute to changes in the composition of the atmosphere and can have significant environmental impacts.
3. The layer of the atmosphere farthest from Earth's surface is called the "exosphere." The atmosphere is divided into several layers based on their characteristics and altitude. The exosphere is the outermost layer of the Earth's atmosphere, located above the thermosphere. In this layer, the density of air is extremely low, and the gases tend to move in a more uncontrolled manner. It is also the layer where satellites orbit the Earth. The other layers of the atmosphere, in descending order from the exosphere, are the thermosphere, mesosphere, stratosphere, and troposphere.
4. Chlorofluorocarbons (CFCs) harm the ozone layer by "destroying ozone molecules." CFCs were widely used in various industries, such as in refrigerants, aerosol propellants, and foam-blowing agents, but they have been phased out due to their harmful effects on the ozone layer. When released into the atmosphere, CFCs can drift upward and reach the ozone layer. These chemicals can be broken down by ultraviolet radiation, releasing chlorine atoms. The chlorine atoms then react with ozone molecules, breaking them apart and depleting the ozone layer, which is crucial for protecting us from harmful ultraviolet radiation.
5. Air pressure is greatest "at sea level" because there are "more" molecules of air pushing down from above. Air pressure refers to the force per unit area exerted by the weight of the Earth's atmosphere. The weight of the air above a certain area creates pressure on that area. At higher altitudes, the air becomes less dense, meaning there are fewer air molecules present in a given volume. As a result, the weight or force exerted by the air column decreases, reducing air pressure. In contrast, at sea level, with a greater number of air molecules in the column of air above, the weight and force exerted by the air are higher, resulting in higher air pressure.