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Earth/Environmental
| Question | Answer |
|---|---|
| How close one's measurements are to the true value | accuracy |
| how close one's measurements are to each other | precise |
| Valid experiments need.. | Trials, controls, reproducibility |
| Which variable do you control/change | independent variable |
| Before the Big Bang matter was.. | small and very dense |
| after the big bang, matter.. | spread out |
| if the big bang is true then galaxies around us.. | will be moving away from us |
| light travels in.. | waves |
| red light has _______ wavelengths | long |
| purple light has _______ wavelengths | short |
| if something is traveling towards you, it will have a shorter wavelength, if it's traveling away, it will have a longer wavelength | dopplar affect |
| light moving away from you will appear redish. light moving towards you will appear blueish | redshift |
| speed something is traveling away | recessional velocity |
| recessional velocity is directly related to the distance from earth | hubble law |
| how much of earth's water is fresh? | 3% |
| how much of earth's water is drinkable? | about 1% |
| ground water is stored in what? | aquifers |
| area of a well that is filled with water | zone of saturation |
| area of a well that isn't filled with water | zone of aeration |
| how big of a space there is between the soil and rock particles | porosity |
| how easily the water flows as an aquifer in the soil | permeability |
| the area of land that drains into a common waterway | watershed |
| all pollutants on land drain into what? | watersheds |
| the end of the river where all the pollutants have collected | river basin |
| where the river water meets ocean water | estuary |
| estuaries are nurseries for _______% of ocean animals | 90 |
| pollution that comes from one exact spot that is easy to find | point source |
| pollution that comes from many different places so it's harder to locate the person polluting | non-point source |
| what is one major chemical that pollutes ground water | arsenic |
| taking freshwater from an aquifer near an ocean, which pulls salt water inwards and contaminates the freshwater | salt water intrusion |
| amount of dirt in water | turbidity |
| amount of acid or base in your water | pH |
| amount of oxygen in water | dissolved oxygen |
| how can you use biotic factors to tell if the water is clean? | if animal and plant life are prosperous, than the water is healthy |
| what does nature use to clean pollution from water? | bacteria |
| how can you know if your water has toxins in it? | turbidity test and pH |
| how can bacteria be helpful to clean water? | they clean pollution out of water by eating it |
| what causes tides | the moon and sun's gravitational pull the water on earth towards it's location |
| large difference between high and low tide | spring tides |
| small difference between high and low tide | neap tides |
| two high tides and two low tides per day | semidiurnal |
| one high tide and one low tide per day | diurnal |
| masses of ocean water that flow from one place to another | ocean currents |
| movements of water that flow horizontally in the upper part of the ocean's surface | surface currents |
| the rising of cold water fro the deeper layers to replace warmer surface water that has been blown away | upwelling |
Created by:
katehickert
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