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Stack #4659082
| Question | Answer |
|---|---|
| what are the main gases in Earth’s atmosphere? Mostly nitrogen and oxygen | Mostly nitrogen and oxygen |
| What are the layers of Earth’s atmosphere? | - Troposphere, - Stratosphere, -Mesosphere, - Thermosphere, -Exosphere |
| The troposphere | This is the lowest layer, where we live.where weather occurs “weather layer” |
| Which of the following layers of the atmosphere is providing the air that we breathe? | The troposphere |
| Stratosphere- | This layer is above the troposphere. It has the ozone layer, which protects us from harmful sunlight “protection layer” |
| Mesosphere | This is the middle layer. It’s very cold where most meters burn up “metor shield” |
| Thermosphere- | This layer is very high up .It can get extremely hot, can see northern and souther lights “hot light layer” |
| Exosphere | the outermost layer, merging into space |
| What is the difference between weather and climate? | Weather is what it’s like right now or today Climate is what it’s like over a long time usually 30 years |
| Air pollutants- | things in the air that shouldn’t be there and can cause harm. |
| Can you see air pollution- | Some air pollution is visible (like smoke)Some is invisible (but still dangerous) |
| Clean air act- | law in the USA that helps keep the air clean and safe to breathe. |
| Primary pollutants- | substances that are already harmful as soon as they are released into the air. |
| Natural sources | : Pollution that comes from nature(wildfires, volcanoes, dust storms) |
| Anthropogenic sources | : Pollution caused by human activities(cars, factories, burning fuel) |
| Stationary sources: | Pollution comes from something that doesn’t move (factories, power plants) |
| Mobile sources: | Pollution comes from things that move around (cars, buses, airplanes) |
| What gas comprises the largest portion of Earth's atmosphere? | nitrogen |
| Which layer of Earth's atmosphere contains the ozone layer that protects life from harmful UV radiation? | Stratosphere |
| Seasons are a result o | differences in the amount and intensity of sunlight brought about by the tilt of Earth's axis |
| Carbon monoxide | blocks oxygen transport in human blood |
| Lead pollution is a problem because lead (Pb) | causes central nervous system damage in humans |
| In the United States, which of the following has decreased since 1980? | air pollution emissions |
| Which gas makes up 78% of the molecules in the atmosphere? | N₂ — nitrogen |
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