Fill in the Blanks :1. ......... is a dark substance formed in soils.

1.	Fill in the Blanks :1. ......... is a dark substance formed in soils.2. ........... rocks have more sand.3. Limestone is changed into __________ under great heat and pressure of the above layers of the rocks.4. When magma reaches earth surface, it is called ............5. Sedimentary rocks are called ......... rocks .
Answer» 1. Humus 2. Porous 3. Marble 4. Lava 5. Secondary.

Fill in the Blanks :1. ......... is a dark substance formed in soils.2. ........... rocks have more sand.3. Limestone is changed into __________ under great heat and pressure of the above layers of the rocks.4. When magma reaches earth surface, it is called ............5. Sedimentary rocks are called ......... rocks .

Answer»

1. Humus

2. Porous

3. Marble

4. Lava

5. Secondary.