Science Sixth Grade Spring Exam SG Flashcards

(98 cards)

1
Q

__________ created the hypothesis of Continental Drift.

A

Alfred Wegner

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2
Q

What are seismographs?

A

objects that detect earthquakes

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3
Q

What are epicenters?

A

points of earthquakes where is started

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4
Q

What are plates made of?

A

Plates are made of either continental or oceanic crust.

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5
Q

Why do plates move?

A

convection currents in the mantle

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6
Q

What are convection cells?where two plates slide past each other.

A

an area where a warm substance rise and cold substance sink

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7
Q

What are the names of the plate types?

A

Divergent, Transform, and Convergent boundaries

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8
Q

Divergent, Transform, and Convergent boundaries

A

Divergent
plate boundaries where the plates are moving apart

Transform
where two plates slide past each other.

Convergent
when two plates collide

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9
Q

What are the disasters each kind of plate boundary can produce

A

Divergent-earthquake and volcanoes

Transform-earthquake

Convergent-oceanic/continental earthquakes and volcanoes, oceanic/oceanic earthquakes and volcanoes, continental/continental earthquakes

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10
Q

Which plate boundaries cause subduction

A

convergent

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11
Q

What is the super continent cycle?

A

First, Columbia and then Rodinia.

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12
Q

What are hotspots and give and example?

A

Hotspots are plumes of hot material rising through the mantle at places other than the plate boundaries.
many hotspots are found in the Hawaiian Islands

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13
Q

Where is water found?

A

oceans=97%
groundwater=0.76%
freshwater=2.5%

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14
Q

Where is freshwater found?

A

glaciers and ice caps=70%
groundwater=30%
surface water=1.2%

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15
Q

What is water made of?

A

two hydrogen atoms and one oxygen atom

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16
Q

What type of molecule is water?

A

Water is polar and causes hydrogen bonds between water molecules

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17
Q

water cycle

A

Evaporation, Transpiration, Condensation, Precipitation, Infiltration

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18
Q

What do humans us freshwater for?

A

Agriculture (most)
Industrial (second)
municipal (least)

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19
Q

Irrigation Methods

A

drip irrigation is more efficient than spray irrigation or furrow irrigation

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20
Q

How is wastewater treated?

A

general process of filters and chemical treatment and then it goes into the ocean

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21
Q

Water scarcity – two kinds:

A

economic (human-caused, like infrastructure or pollution)
physical (just no water there)

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22
Q

drought-

A

period of abnormally low rainfall

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23
Q

Water Conservation Methods

A

Using drip irrigation, taking shorter showers, and collect rainwater

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24
Q

streams-

A

freshwater that flows in a channel, usually downhill

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25
rivers-
a big stream
26
bed-
the bottom of a stream
27
banks-
the side of a stream
28
conffluence-
where two tributaries meet
29
meander-
a very curved part of a river in flatter land
30
floodplain-
land that is regularly flooded by a river when it overflows its banks
31
Oxbow Lake
a lake formed when a meander is cut off from the rest of a stream
32
deltas-
a branching of a river near its mouth into many streams due to sediment settling out
33
estuaries-
an ecosystem that forms where freshwater and saltwater are mixed
34
River basin:
(watershed) entire geographical area that empties into a particular river
35
Continental Divide:
line through North and South American continents that divides where the water flows to the east or to the west
36
Water Type of Ponds and Lakes
freshwater (most of them) & saltwater (Great Salt Lake)
37
Ponds and Lakes Types
glacial, kettle, crater, rift, and oxbow
38
Man Made reservoirs:
lakes, usually created for power generation (Lake of the Ozarks)
39
Good Effect of Floods
replenishment of soil nutrients, bad: destruction of structures
40
Glaciers
large areas of ice, become icebergs when they break off into the sea
41
Glacier (ice sheets, ice caps, apline glaciers)
ice sheets-the largest area of ice, covering areas like Greenland and Antarctica (BIGGEST) ice caps-a larger area of ice, big and deep enough to hide the shape of the land below it (BIGGER) alpine (ice rivers)-ice sheets that form 'rivers' down valleys in the mountains
42
Porosity-
gaps between rocks in the ground that allow water to pass through
43
permeability-
water is able to pass through
44
saturatedzone-
the layer of ground that where water stays; the soaked layer in the ground
45
water table
the top of the saturated zone in the ground
46
aquifers:
a large area of saturated rock in the ground
47
recharge-
water that enters the aquifer
48
discharge-
water that leaves the aquifer
49
springs-
water that comes from inside the ground naturally
50
geysers-
-a type of natural discharge
51
wells-
a type of manmade discharge
52
Hot Springs
a body of water that is naturally hot or warm
53
Groundwater depletion:
causes, ground subsidence
54
Clean Water Act, Environmental Protection Agency
water streams are regularly tested pollution is tracked to its source polluter fix the water themselves there are large fines for contaminating the water
55
Chemical makeup of the atmosphere:
78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide. Water vapor percentage varies from place to place on Ear
56
humidity
-is the amount of water vapor in the atmosphere
57
Can colder air hold more humidity than warmer air?
No, warmer air can hold more water vapor than cold air
58
Greenhouse gasses keep ____ in the atmosphere
heat
59
If altitude = elevation does air gets less dense and colder at higher altitudes.
yes
60
Four Layers of the Atomosphere
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
61
Troposphere
Lowest layer of atmosphere (and shortest) all the weather happens here Densest layer Gets its heat mainly from the ground, after the ground has soaked up radiation from the sun Convection currents: warm air rises, cool air falls in a loop
62
inversions-
warm air sits on top of cold air, instead of the usual opposite, so air doesn’t circulate
63
Stratsphere
2nd layer Ozone layer
64
Mesosphere
sprites, elves 3rd layer Meteor showers
65
Thermosphere
Top layer (unless you count the exosphere as an atmospheric layer) This layer absorbs gamma rays and x-rays, protecting us
66
Northern and Southern Lights
Auroras: aurora borealis (northern lights) aurora australis (southern lights)
67
Shorter wavelengths=
more energy
68
lowest energy waves are...
radio waves
69
most energy waves are...
gamma waves
70
Solar Energy
Solar energy travels as photons Photons have wavelengths: shorter wavelengths = more energy
71
Electromagnetic spectrum:
radio waves = lowest energy, microwaves, infrared, visible light, ultraviolet, x-ray, and gamma rays = most energy
72
Heat transferred three ways:
-radiation, conduction, convection
73
Radiation
transfer of energy by electromagnetic waves
74
Connduction
transfer of heat by direct contact
75
Convection
transfer of heat by movement of actual particles
76
Does the pole get more sunlight than the equator?
No, the equator gets more sunlight than the poles.
77
What are the three global convection cells:
Hadley, Ferrel, Polar
78
How does high and low pressure affect the weather?
High Pressure=clear skies Low Pressure=cloudy or precipitation
79
Coriolis effect:
winds that would go north-south go at a diagonal because the Earth is spinning
80
What directions are Trade Winds, Westerlies, Polar Easterlies (directions, and where they are)
Trade Winds flow towards the equator from the north and south at about 30 degrees latitude. Westerlies blow from west to east in the mid-latitudes (between 30 and 60 degrees latitude). Polar Easterlies flow from the poles towards the mid-latitudes, at 60 degrees latitude.
81
Weather vs climate:
weather is conditions at a specific place at a specific time. climate is the long-term average of the weather for a location
82
Aspects of weather: temperature, air pressure, fog, humidity, precipitation, etc.
weather-conditions at a specific place at a specific time temperature-a measure degrees of heat air pressure-amount of pressure in the atmosphere fog-a cloud that is low and make it hard to see outside clearly humidity-amount of water vapor in the atmosphere precipitation-water falling from the sky
83
What causes the weather?
the sun and its radiation
84
Heat index vs humidity
heat index-How temperature feels when combined with humidity humidity-amount of water vapor in the atmosphere
85
Clouds: be able to identify and name clouds based on their shape and elevation:
Cirro-high/fluffy Alto-medium level Stratus-low/flat
86
Air masses:
maritime-over the ocean and they are wet continental-over land and they are dry Arctic-very cold (A) Polar-less cold (P) Equator-warm (T)
87
Weather fronts:
cold front when a cold air mass runs into a warm air mass warm front when a warm air mass runs into a cold air mass occluded front when a warm air mass gets stuck between 2 cold ones stationary front two air masses stop and meet q
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What precipitation do cold fronts have?
thunderstorms and tornadoes
89
Do thunderstorms have convection currents?
Thunderstorms have convection currents within them, form at fronts as moist air rises
90
How far is lighting?
5 seconds per mile
91
What are squall lines?
Squall lines are lines of thunderstorms
92
What do meteorologists study?
weather
93
Tools for weather data: thermometer, hygrometer, anemometer, wind vane, rain gauge
thermometer-temperature hygrometer-humidity anemometer-wind speed wind vane-wind direction rain gauge-rainfall
94
What are some things that help us measure weather?
Weather stations, weather balloons, weather satellites, radar stations
95
Climate-
is long-term average of weather for a place
96
Latitude-
Latitude is distance from the equator. Measured in degrees (up to 90)
97
Climate effects of global convection cell borders:
high pressure (dry), low pressure (moist)
98
Climate Zones: the dread Köppen Classification System
A: Tropical (hot, wet) B: Dry (arid, might be hot or just warm) C: Temperate (moderate temperatures, not too dry and often wet) D: Continental (biggest swings in temperature, dry or wet, warm or cold) E: Polar (really cold all the time)