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Description
Flashcards by hannahashahudson, updated more than 1 year ago
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Created by hannahashahudson
over 10 years ago
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| Question | Answer |
| What is a mineral? | A naturally occurring substance |
| What are minerals used for? | Their properties: Lustre, sine and hardness. Which can make money |
| What do we use to identify a mineral? | Colour, Hardness, Streak, Clevage, Lustre, Density and Reaction with Acid. |
| How is hardness of a rock or mineral tested? | Scratching a mineral on a specimen then judging it against Moh's scale: Talc is the softest and Diamond is the hardest. |
| What is a streak test? | Streak means the coloured of the powdered mineral, this is tested by rubbing the rock on a porcelain tile. |
| What is a mineral lustre and what are the types of it? | Lustre describes the way a mineral reflects light: metallic, vitreous (glassy or dull. |
| What does density mean in relation to minerals? | Density means heaviness in comparison to its size Density=mass/volume |
| If you put acid on a... it fizzes | Carbonate |
| Explain the process in which free flowing lava cools. | As it cools it forms Basalt. Gases escape easily and the lava cools steadily not blocking the volcano vent -they are less violent then other volcano types therefore is not explosive as the volcano has no time to trap gases as there is a constant flow. |
| Lava which is very slowly running (viscous) cools to form.... | Rhyolite which has different chemical properties to Basalt -which is formed by free flowing lava. |
| When does Rhyolite crystalize? | Very early on whilst trapping gas and making pressure build up. |
| What do volcanoes that produce Rhyolite look like? | Cone shaped |
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