1. What is the ozone layer and how does it affect me?

2. Where is the Ozone Layer?
The ozone layer exists in the __________, km above your head. .
The stratosphere is just above the ___________, where we live.
We can’t see the ozone layer but our lives depend on it.
Stratosphere
troposphere

3. What is ozone? The oxygen we breathe has ___ atoms
_______forms when oxygen is broken apart by high energy ultraviolet rays in the stratosphere
The extra ______ joins another two oxygen, making ozone (3 oxygens) 2
Ozone
oxygen

4. Ultraviolet radiation
Ultraviolet radiation (UV) is one of the many types of __________that come to the Earth from the Sun.
Too much exposure to __________________ can cause skin cancer
The ____________ protects us from some of these rays
The atmosphere
_____________ which breaks apart the oxygen, forming ozone.
radiation
ultraviolet radiation
ozone layer
absorbs energy

5. The ozone layer represents a __________of the gas in our atmosphere
But it _________ people and life from damaging UV rays
Not all of the energy from the sun is helpful!
small portion
protects

6. CFCs
Humans have produced harmful chemicals that damage the ozone layer.
These _________ are called chlorofluorocarbons
They contain a combination chlorine, fluorine and carbon atoms that hurt the environment
They ________the ozone layer!
chemicals
destroy

7. CFCs People loved CFCs because they were ______________
We knew they were bad 40 years ago but we used them anyway
It took almost __years to do something about it
cheap and effective 20

8. The “hole” in the ozone
There are currently “holes” in the ozone above the ______ and ______ poles
This is because of the weather. It is only destroyed in the winter when it’s very cold.
Images like this one help the scientists __________the ozone layer
The ozone layer is __________itself but we need to watch it and make sure it recovers
north
south
monitor
repairing

10. Summary Ozone absorbs energy and protects us from UV rays
CFCs damage the ozone
The Ozone is healing now that we have reduced the number of CFCs.

11. Tonight’s Homework
For the next week, you will track your water usage in a log.
Keep track of when you use water, how long you use it, and what you’re using it for.
This includes:
Washing your hands
Taking a shower/bath
Using the toilet
Washing dishes
Ask your parents how often they water the lawn and for how long.