Activity9  

        Igneous rocks are one of the three major categories of rocks. The word igneous is derived from the Latin word for fire, ignis or ignus. 

     These rocks are commonly found in the surface and beneath the Earth, specifically in divergent boundaries, convergent boundaries, subduction zones and hotspots. Not all igneous rocks have the same physical and chemical characteristics. They differ in the origin, process of formation, color, density, size of grains, crystals and many more. 

Igneous rocks are formed through the process of solidification and crystallization of molten rocks; magma and lava. When hot, molten rocks reach the surface of the earth, they undergo changes in temperature and pressure causing them to cool, solidify and crystallize. Moreover, there are also solidification and crystallization magma beneath the earth.

Compare and contrast the formation of different types of igneous rocks

Pen 

Paper

internet connection

rocks

1 . Go outside and collect 3 pieces of rock.

2.Observe their color, shape, texture and other physical characteristics.

3. Then, start to crack or scratch the rock.

4. observe and record the data in the table below.

5. Take pictures of every step in the experiment.

1.How will you know if they are igneous rocks?

2. What are the things you should consider in identifying igneous rocks?

3. Describe the appearance of the rocks from the darkest colored rock to the lightest

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