Similarly, liquid magma also turns into a solid &#8212 a rock &#8212 when it is cooled. Any rock that forms from the cooling of magma is an igneous rock. Magma that cools quickly forms one kind of igneous rock, and magma that cools slowly forms another kind. When magma rises from deep within the earth and explodes out of a volcano, it is called lava, and it cools quickly on the surface.
A flowerpot filled with potting soil. Potting soil, also known as potting mix or potting compost, is a medium in which to grow plants, herbs and vegetables in a pot or other durable container.
Seed Starting: Preparing the Potting Mix Make sure the potting mix is not lumpy. Â© Marie Iannotti Loosen and dampen the potting mix before you put it into your seed starting containers. It is easier to get a uniform level of moisture if you do it this way. Dampen the mix to the consistency of a rung-out sponge. It should be wet, but not dripping, with no dry lumps. There are many good potting mixes available.