Air
Name:_________
What is global warming?
Over the last few hundred years, the average
temperature of the Earth’s oceans has been rising.
This is ___________ ___________
Why is this a problem?
Global warming increases the ___________in the
atmosphere, making it ___________– more
___________, more ___________, more ___________.
What about the Greenhouse Effect?
The world needs the greenhouse effect. Without it, it would be too ___________.for most
organisms to ___________.
The key greenhouse gases
A ___________ ___________.is a gas in the atmosphere that reflects ___________
___________.back to Earth.
gas
source
carbon
dioxide
One of these gases in particular is on the rise, causing the
‘___________ ___________ ___________..
Which gas?
methane
CFCs
What processes produce this gas?
ozone
nitrogen
oxide
How acidic is acid rain?
Acid rain is more acidic than normal rain.
Substance
pH
All of these processes produce acidic gases which cause
acid rain.
unpolluted rain
1.
car battery acid
2.
acid rain from a polluted
area
3.
acid in your stomach
4.
pure water
5.
vinegar
The main acidic gases are:
• sulphur dioxide (___________)
• nitrogen oxides (___________)
Acidic gases in the air can cause ___________problems.
How is Acid Rain formed?
Effects of acid rain
Acid rain is a ___________acid solution. The acid in your stomach is stronger and more
___________.
But acid rain is dangerous because it ___________ ___________ ___________ ___________.
Think how much rain falls on a building over 200 years!
Even a slight ___________in the acidity of rain could have serious effects over this timescale.
And because the changes from day to day are ___________, people do not notice them.
Acid rain reacts to _________________________________such as limestone. This destroys
valuable buildings
It makes _______________________________________________________.
This causes problems on moors and mountains where the ground is already acidic.
It allows poisonous chemicals such as ___________ ___________to dissolve in water and soil.
They poison trees and fish.
It reduces the growth of plants, including ___________ ___________