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science weather air
test study guide
| Question | Answer |
|---|---|
| What is the percentage of Oxygen in the air | 19% |
| The water cycle | the continuos movement of water from water sources such as lakes rivers and oceans, into the air, onto and over land, into the ground, ind back t water sources |
| The water cycle | |
| 1. evaporation | when liquid water turns into gases water called water vapor |
| 1a. transpiration | plants release water vapor into the air |
| 2. condensation | when water vapor turns into liquid water |
| 3. precipitation | water falls back to earth |
| 4. run-off | water collects and returns to water sources |
| What is weather | weather is the condition of the atmosphere at a particular time and place |
| what is the solid form of water | snow |
| what is the liquid for of water | rain |
| what is the gas form of water | water vapor |
| humidity | the amount of water vapor in the air |
| when temp. increases what else increases | water vapor because there is more thermal en. to do the work of evaporation |
| relative hum. | is how much water vapor is in the air compared to how much could be in the air at a particular temp. |
| Dew point | this is the point at which air is saturated ( full of water ) and condensation begins. it is measured in degrees. it accurately reflects how it feels outside |
| what happens when relative humidity reaches 100% | the air is saturated, and reaches its dew point |
| dew point can never be higher than the __________ | temperature |
| if dew point increases that means the _________ has increased | moisture |
| CLOUDS | |
| cumulus clouds | - puffy - white clouds |
| cumulonimbus clouds | - storm clouds |
| cirrus clouds | high clouds - - - - - - - |
| stratus clouds | layered clouds |
| PRECIPITATION | |
| what do rain drops look like | hamburger buns |
| how does snow form | forms when water vapor changes directly to a solid ( ice crystals ), sometimes ice crystals join together to make snow flakes . |
| how many points does a snowflake have | 6 |
| how does sleet form | sleet forms when rain falls through a layer if freezing air it freezes and produces ice |
| in which cloud is hail made in | cumulonimbus cloud |
| hail occurs in ___________ and _______ | spring and summer |
| how does hail form | hail starts out as rain and when it falls through the warm section of the cloud it evaporates and goes in the cold section f the cloud after doing this patterns a lot of times it creates layers of ice and forms hail |
| Cloud in a bottle experiment | |
| 1st step of cloud in a bottle experiment | water vapor and dust particles are in the air |
| 2nd step of cloud in a bottle experiment | when you squeeze the bottle, you increase the pressure in the bottle |
| 3rd step of cloud in a bottle experiment | the increased pressure causes the temp. to rise |
| 4th step of cloud in a bottle experiment | the rising air temp. causes more of the water in the bottom if the bottle to evaporate ( turn into water vapor ), increasing humidity in the bottle. |
| 5th step of cloud in a bottle experiment | when you release the bottle, the pressure in the bottle drops |
| 6th step of cloud in a bottle experiment | when the pressure drops, the temp. also drops |
| 7th step of cloud in a bottle experiment | when the air cools, it is saturated (cold air cannot hold as much moisture as warmer air) . in other words, the air has reached dew point |
| 8th step of cloud in a bottle experiment | condensation occurs |
| 9th step of cloud in a bottle experiment | Billions of tiny droplets of water join together and make a cloud |
| Condensation nuclei | dust, salt, ash etc. particles in the air onto which water vapor condenses to form a cloud |
| conduction | is the transfer of thermal en. from one material to another by direct contact |
| convection | is the transfer of thermal en. by the circulation or movement of a liquid or gas ( fluids ). |
| radiation | is the transfer of en. as electromagnetic waves. |
| what tool is used to measure relative humidity | psychrometer |
| what tool is used to measure rain | rain gauge |
| how is a rain drop formed | a rain drop starts as small as a period then other droplets join and make a rail drop. |
Created by:
superstack
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