REMEMBER THAT… 1) To form the past tense of regular verbs, add

►– ED:

Play ►Played Look ►Looked

2) In some cases, extra changes are needed:

Travel ►Travelled Marry ►Married

3) Verbs can have irregular past forms:

To Be ►Was/Were Sell ►Sold

4) For the negative, use Didn’t+INFINITIVE:Like ►Didn’t like Kill ►Didn’t kill Be ► Wasn’t/Weren’t

THE WORLD IS IN DANGER… (or not!)

OBJECTIVES

• To become aware of the changes that our planet is undergoing

• To propose measures to stop climate change

WHAT DO YOU KNOW ABOUT THE EARTH?

• Third planet from the Sun• Only astronomical body where life

is known to exist• Formed 4.54 billion years ago, life

appeared within one billion years – expected to continue for at least 500 million years

• About 71% of the surface is covered with salt water oceans

• Liquid water, necessary for all known life, is not known to exist in on any other planet's surface

• Earth orbits the Sun once every 365 days

• Earth's only known natural satellite is the Moon

• Does life exist in any other planet?• When was the Earth formed?• What is necessary for all known

life?• What percentage of water does the

Earth present?• How close is it to the Sun?• Does it have any satellite?• How long does it take to orbit the

Sun?

ARE THESE CONCEPTS FAMILIAR?

Pollution Global warming Greenhouse effect Sustainable developmentIntroduction of contaminants into a natural environment that causes instability, disorder or harm to the ecosystem

Process by which thermal radiation is absorbed by atmospheric greenhouse gases and re-radiated in all directions. As a result, temperature is higher

Current rise in the average temperature of the Earth initiated by human activities that increase concentrations of greenhouse gases in the atmosphere

Pattern of resource use that aims to meet human needs while preserving the environment

GREEN HOUSE EFFECT EASY TO UNDERSTAND!

CLIMATE CHANGE

TASK 1

• Make a list of things that we are doing wrong. For example: We are using private cars too much.

TASK 2• Make a list of things that we will

have to do to improve the situation. For example: We will have to use public transports.

ARE WE DOING ENOUGH TO SAVE OUR PLANET?

CONCLUSIONS

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