volcano1.gifmulti-word fill quiz 8Hwf3 on "The rock cycle"
(a worksheet for QCA KS3 science-chemistry)

Site Meter* Do online OR printout, do, return to check answers. * KS3 Science Index * EMAIL comment?query * Doc Brown's Chemistry updated June 11th 2009 *

   ash      basalt      bubbles      buried      cooling      crystal      cycle      deep      dense      fast      future      granite      igneous      lava      magma      melted      rock      size      slow   
volcano2.gif1. When from volcanic activity cools down, it forms rocks.

2. The grain or in igneous rocks depends on the rate of .
(a) If the magma cools on the surface, the grain size is small forming rocks like .
(b) If the cooling is deep in the earth, the grain or size is large forming rocks like .

3. In volcanic eruptions the magma can flow out as , or be blasted out as .

4. Igneous rocks like pumice are not very (light) because they contain trapped of gas.

5a. Eventually all rocks of whatever type, get and back into magma.
5b. This happens in the earth's crust.
5c. In the the same material might come back out as magma and be changed into another rock form. This goes on all the time and is called the .