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earth science chap 2
9th earth science chapter 2
Question | Answer |
---|---|
Define Element | A substance that cannot be broken down into simpler substances |
What particles make up an atom | protons, neutrons, electrons |
What charge does a proton have and where is it found | positive, found in nucleus |
What charge does a neutron have and where is it found | no charge, found in nucelus |
What charge does an electron have and where is it found | negative, found surrounding the nucleus |
Define compound | when elements are more stable in a combined form |
Define isotopes | atoms of an element with the same number of protons but a different number of neutrons |
When do chemical bonds form | when an atoms outer energy level doesn't have the maximum number of electrons |
What is crystallization | the forming of minerals from the cooling of magma |
what is precipitation | the forming of minerals from dissolved substances are left behind to form minerals after water in lakes or ponds evaporate |
what is hypothermal | the forming of minerals from very hot mixtures of water and dissolved substances |
Define mineral | solid, inorganic, arranged crystallization, naturally occurring, and definite chemical composition |
How are minerals classified | composition |
What are the classes of minerals | oxides, carbonates, sulfates, sulfides, halides, silicates, and native elements |
What is the most common groups of minerals | silicates |
What are the properties of minerals | cleavage, fracture, streak, color, density, hardness, luster, and distinctive properties |
If a mineral breaks along flat or even surfaces it has what property | cleavage |
What are some distinctive properties of minerals | Greasy feel, magnetic, fizzes with hydrochloric acid, double refraction, and rotten egg smell |
What is Moh's scale | It measures the hardness of minerals |
Define molecule | the smallest particle of a covalent compound that shows properties of the compound |
Define covalent bond | when atoms share electrons |
Define hydrothermal solutions | when minerals form from very hot mixtures and dissolved substances |
What is the equation to find density | density = mass/volume |
How is carbon 12 different from carbon 13 | carbon 12 has 6 neutrons, and carbon 13 has 7 neutrons |
How does temperature result in the formation of new minerals | high temperatures breaks bonds and cooling creates new ones |
How does pressure result in the formation of new minerals | increased pressure causes crystals to reform |
What are carbonates | minerals with carbons and oxygen and metal |
what are 2 examples of carbonates | calcite and dolomite |
why is streak a helpful property to use when identifying minerals | mineral color on outside can vary but the streak remains constant |