CHEMISTRY REVIEW

3. sedimentary rock is most likely to be ... meaning it has tiny spaces between grains that can hold water
4. crystal on the igneous rock was made of ….
6. it is the hot, metallic centre of the Earth.
8. an ancient insect perfectly preserved inside hardened tree resin is called
9. an indicator that turns red in acid and blue in alkali.
10. a substance with a pH less than 7.
13. it is the solid, the thinnest and outermost layer of the Earth
14. marble is a metamorphic rock that forms from which original rock
15. intrusive igneous rocks have large crystals because they cooled very
16. the scale used to measure how acidic or alkaline a substance is.
17. a rock formed from the cooling of molten magma or lava.

1. an acid found in stomach.
2. scientists who study fossils are called ....
4. molten rock found beneath the Earth's surface.
5. an acid found in citrus fruits like lemons and oranges.
7. coal is a type of … rock formed from plant and animal remains
11. rock formed when any type of rock goes through changes caused by extreme heat and pressure
12. a substance with a pH greater than 7.