earth and life intro

1. EARTH AND LIFE
SCIENCE
Prepared by: Mrs. Gladys O. Real

4. Igneous rock comes from cooling and solidification
of magma or lava. Examples of igneous rocks are
granite, pumice, obsidian and basalt.

5. Sedimentary rocks are formed from sediments coming
from weathering and
erosion of older rocks . Some examples are sandstone,
limestone, shale and
conglomerate.

6. ◦Metamorphic rocks change over time applying intense heat and
pressure. Some
examples are quartzite, marble and slate. Among all types of
rocks, Metamorphic is the hardest.

8. ◦The original rock can either be sedimentary,
igneous or even other metamorphic rock. Any
kind of rocks can change into a new rock. This
is what we call METAMORPHISM.

9. Rocks can be stressed. Stress on rocks is a force that
changes the rocks’ shape and volume. There are
different types of stress. These are compression,
tension and shearing.

10. ◦Compression is a kind of stress where rocks tend to
compress each other. It happens in convergent boundaries.
There is a tendency for the rock to be squeezed until it
breaks or folds. This can cause the rock to shortened. Most
famous example of compression is the Rocky Mountain in
North America.

12. ◦Tension is another type of stress that influence rock
behaviour. It occurs in divergent boundaries. This time, the
rocks move away from each other. This is the opposite of
compression. Continents is the best example of tension
stress .

14. ◦Shearing is a stress caused by pushing a mass of rock
in two opposite direction that break and slip apart or
changes its shape. It happens in transform boundary
.San Andreas Fault is an example of shearing