5277949
Description
Flashcards by Ella Maggs, updated more than 1 year ago
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Created by Ella Maggs
over 8 years ago
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| Question | Answer |
| How is the hardness of two materials compared? | By rubbing them together, the softer one will chip away. |
| If the raw material is clay, what is the building material? | The building material is brick.. |
| If the raw material is limestone and clay, the building material is? | The building material is cement. |
| If the raw material is sand, the building material is? | The building material is glass. |
| Why are expensive looking buildings misleading? | Many building look like they are made from one expensive material. However they are made with cheaper materials, and lined with a expensive one. |
| How is a sedimentary rock formed? | It is formed form soft sediments compressed together, this making them a soft rock. |
| How is metamorphic rock formed? | This is formed when soft sediments are compressed together, like a sedimentary rock, but it is then changed by extreme heat and pressure. |
| How is igneous rock formed? | This is formed when magma cools and solidifies. |
| Give an example of a sedimentary rock, and describe it's hardness. | Limestone, soft rock. |
| Give an example of a metamorphic rock, and describe it's hardness. | Marble, hard but not as hard as a igneous rock. |
| Give an example of an igneous rock, and describe it's hardness. | Granite, the hardest. |
| What does the size of a igneous rock's interlocking crystals suggest? | The slower the magma cools the bigger the interlocking crystals will be. |
| What is a thermal decomposition reaction? | This is reaction where one substance breaks down during heating to make two new substances. |
| What is the thermal decomposition reaction equation when calcium carbonate is heated? | Calcium carbonate --> calcium oxide + carbon dioxide |
| How is concrete made? | It is made by mixing cement, sand and small stones, with water. |
| What is the thermal decompostion reaction symbol equation for calcium carbonate? | CaCO3 --> CaO + CO2 |
| What is a composite material? | This is a material that has at least two materials that still can be distinguished. |
| What is reinforced concrete? | This is concrete with steel rods or meshes running through it. |
| Describe concrete's strength. | It is strong under compression but weak under tension. |
| If heavy loads are applied to a concrete beam, what happens? | The beam will crack under tension, and eventually break. |
| Describe reinforced concrete's strength. | It is harder and more flexible than normal concrete. |
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