Page 123 - Active Science 5 Ebook and Activity

2. Sedimentary rocks are easiest to identify because of the presence of ______.

a. minerals b. crystals
c. fossils d. layers

3. Quartzite is formed from the transformation of _________.
a. gneiss b. marble
c. limestone d. sandstone

4. Slate and shale are examples of ________.
a. sediments b. marble

c. metamorphic d. gneiss
5. Which fossil fuel is used for generating electricity?
a. Natural gas b. Petroleum

c. Kerosene d. Coal

B. Fill in the blanks.
1. The centre of the earth is called ________________.

2. ________________ generally erupt from mountains.
3. The rocks formed by hardening of lava are called ________________ rocks.

4. Chalk is obtained from ________________.
5. ________________ rocks are formed by the slowly cooling of lava.

C. Match the following.

A B
1. Marble a. used in blast furnace in steel plants.

2. Precious stone b. naturally occurring compounds containing minerals.

3. Coal c. limestone

4. Ore d. a change – physical or chemical
5. Metamorphic e. emerald

D. State whether the following statements are true or false.

1. Granite is a rock formed due to the quick cooling of lava. ________
2. Lava cools down to form igneous rocks. ________

3. Pumice is an igneous type of rock. ________
4. Obsidian is also called volcanic glass. ________
5. Sedimentary rocks are never formed in layers. ________

E. Give two examples for each of the following.
1. Igneous rocks ___________________ ___________________

2. Sedimentary rocks ___________________ ___________________
3. Metamorphic rocks ___________________ ___________________

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