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science final review
science
| Question | Answer |
|---|---|
| what is the cause for a land breeze, which way does it move, and night or day? | land cools down quicker than the water at night causing a convection current. cool air moves out towards the sea. it moves counter clockwise and is at night |
| what is the cause for a sea breeze, which way does it move, and night or day? | land heats up faster during the day. cool air from the sea moves in towards the land. it moves clockwise and is during the day |
| in ___________ the suns rays warm the earth | radiation |
| in _________ the earth warms the air | conduction |
| describe the movement of fluids during convection | cool (more dense) air or water sinks + moves in underneath the warm (less dense) air/water. warm air/water rises causing movement-a convection current |
| sea and land breezes are examples of what type of heat transfer? | convection |
| give 2 examples of radiation: | 1. sun heating a rock 2. sun tanning |
| give 2 examples of convection: | 1. a 2 story house gets hotter on the 2nd story 2.hot water near the equator circulates with the cooler water near the poles |
| give 2 examples of conduction: | 1. metal pan being heated by the burner 2. touching a hot stone + getting burned |
| how do warm ocean currents affect coastline climates? | they bring warmer air + create a warmer climate |
| how do cold ocean currents affect coastline currents? | they bring cold air creating a colder climate |
| define air mass: | a large body of air that takes on similar temperatures + humidities |
| ____________ gets its properties from warm areas near the equator | tropical air mass |
| ____________ gets its properties from cold areas near the poles | polar air mass |
| ____________ gets its properties from over land | continental air mass |
| ____________ gets its properties from over ocean | maritime air mass |
| how do warm air masses affect weather | bring warmer weather + low pressure- humid |
| how do cold air masses affect weather | bring colder weather + high pressure- dry |
| air tends to move from areas of ______ pressure to areas of _______ pressure | high, low |
| winds in a high pressure area will flow in what direction | clockwise |
| winds in a low pressure area will flow in what direction | counter clockwise |
| low pressure areas are associated with what kind of temperatures and humidity | warmer temperatures and high humidity |
| high pressure areas are associated with what kind of temperatures and humidity | colder temps and low humidity |
| what is the symbol for a warm front | red, half circles |
| what type of weather is associated with a warm front | warmer temp. humid air, light rain that lasts over a few days |
| what is the symbol for a cold front | blue, pointed triangles |
| what type of weather is associated with a cold front | cold air, thunderstorms during, clear skies after, dry air |
| elements in the same group have what in common? | valence electrons and chemical property |
| elements in the same period have what in common? | electron shells |
| what gives the name of the element | number of protons |
| how do you find the neutrons? | subtract the number of protons from the atomic mass |
| protons and _________ usually have the same number | electrons |
| what kind of charge does a proton have? | positive |
| what kind of charge does a neutron have | neutral |
| what kind of charge does a electron have | negative |
| what is a coefficient and what does it represent | the large number before a element in a chemical equation and it represents the number of molecules and you multiply them by the subscript to find the number of molecules |
| what are the smaller numbers after the elements in a chemical equation called and what do they represent | they are called subscript and they tell the number of atoms |
| what are the 5 signs of a chemical change | 1. unexpected color change 2. odor produced 3. gas produced 4.solid precipitate 5. temperature change/ light produced |
| how do you know if an example is talking about speed? | it will say the speed the object is going |
| how do you know an example is talking about acceleration? | it will give you a change in speed or direction such as a runner running the 400 m dash(the curbs in the track) or a car slowing down for a stop sign |
| how do you know an example is talking about velocity? | it will give you the speed and direction |
Created by:
katy.romyy
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