Page 216 - New Medley 5 Semester 2

Competencies
C-1.1

• Analysing
• Hands-on Learning
• Remembering
21st CENTURY SKILLS
• Critical Thinking
3 Rocks and Minerals
• Life Skills

Warm Up • Analysing

Most of the metals and precious stones are obtained from
rocks. They are very important and useful in many ways. Can

you tell what is shown in the picture? What are its uses?

THE EARTH – A HUGE ROCK

Earth is a planet. Do you know what is it made up of? It is made up of rocks.

erefore, it is, sometimes, called the third rock from the sun.

e study of the earth is called Geology. Study of rocks provides a record of the

evolution of living things on the earth.

Types of Rocks

Rocks present in the earth’s crust are grouped Knowledge Zone

into three di erent types. ese are igneous Igneous rocks are among the oldest rocks
rocks, sedimentary rocks and metamorphic on the earth.
rocks.

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