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Flashcards in Chemistry of the Atmosphere Deck (20):
1

What is the composition of the atmosphere in the present day?

-80% Nitrogen
-20% Oxygen
-Small portions of carbon dioxide, water vapour and noble gases (<1%)

2

For how long has the composition of modern Earth's atmosphere lasted?

200 million years approximately.

3

What time scale in considered the atmosphere of Early Earth?

4.6 Billion years ago

4

What was the composition of Early earth's atmosphere?

It is though to be similar to venus or mars- largely carbon dioxide with little to no oxygen

5

What were the conditions of Early Earth?

It was very hot due to intense volcanic activity which led to nitrogen, a small amount of methane and some ammonia building up in the atmosphere.

6

What did Early Earth's volcanoes facilitate?

Nitrogen produced from volcanoes could bond to form water leading to oceans,

7

How were oceans beneficial in altering our planet's atmosphere?

Carbon dioxide could be dissolved into the water producing sediments and reducing carbon dioxide in the atmosphere.

8

How did oxygen content in Earth's atmosphere increase?

Algae and plants formed and began to photosynthesise.

9

What is the equation for photosynthesis?

Carbon dioxide + Water ⟶ Glucose + Oxygen

10

When did algae first form on Earth?

2.7 billion years ago

11

How did carbon dioxide in the atmosphere decrease?

-Sedimentary rocks through the ocean
-Plants via photosynthesis

12

Why are greenhouse gases important?

The gases help maintain a temperature on Earth which enables life.

13

How can humans impact the atmosphere?

Release of greenhouse gases like carbon dioxide or methane.

14

What is a major cause of climate change?

An increase in global average temperature.

15

List some effects of climate change:

-Flooding (rising sea level)
-Greater risk of mass movement (rock movement) from glacial melt
-Increased water stress (less fresh water)
-Drought
-Mass migration from climate or drought or simmilar

16

What is the carbon footprint?

The amount of greenhouse gases produced from a cycle of a process, product or event.

17

What may fossil fuels, and sometimes hydrogen, produced when burnt (not carbon dioxide)?

Sulfur, Nitrogen oxides and particulates

18

Why is carbon dioxide dangerous?

It is a colourless odourless; toxic gas.

19

Why are sulfur and nitrogen oxides a concern?

They can cause respiratory problems and cause acid rain.

20

Why are particulates a concern?

The particulates cause global dimming and health problems in humans.