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Week 2.6
Question | Answer |
---|---|
reflection is - | the BOUNCING of light when it hits a smooth, shiny surface |
refraction is - | the BENDING of light when it travels through a new medium like glass or water |
objects that reflect - | mirror, smooth metals, tinted glass, dark TV screen |
objects that refract - | water, lenses, prisms, microscope, telescope, magnifying glass, hand lens |
How does light travel? | in straight lines, even after being reflected or refracted |
Deltas are formed by - | water (river) deposition |
Sand dunes are formed by - | wind erosion & deposition |
Valleys are formed by - | glacier (ice) erosion |
Canyons are formed by - | water (river) erosion |
Which soils allow the most water to pass through? | gravel or sandy soil |
Which soils are most absorbent (hold the most water) | humus |
What force holds the planets in their orbits? | gravity from the sun |
Processes cause by the sun | evaporation, wind formation, photosynthesis |
Processes NOT caused by the sun | volcano eruption, earthquakes, weathering and erosion |
Weathering - | rocks are BROKEN down into sediment |
Erosion - | sediment is MOVED from one place to another |
Deposition - | sediment is DROPPED in a new location |
Sedimentary Rock formation - | weathering, erosion, deposition, heat & pressure cause compaction, cementation, millions of years |
Compaction - | sediments are "squeezed" together and made smaller |
Cementation - | sediments become "glued" together to form a sedimentary rock |
Thermal energy is - | heat energy |
Mechanical energy is - | movement energy |
When looking at layers in sedimentary rock, which layer is the YOUNGEST? | the top layer |
When looking at layers in sedimentary rock, which layer is the OLDEST? | the bottom layer |
Fences on the beach can help prevent - | erosion of sand |
How does the Sun power the water cycle? | The Sun causes water on Earth's surface to evaporate |
What adaptation would help birds migrate? | strong wings |