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sci knowledge map

7th grade science knowledge map

What are the three types of global winds? trade winds, the westerlies, and the polar winds.
Prevailing winds blow from 30 degrees toward the equator. trade winds
Prevailing winds that blow from the southwest in the Northern Hemisphere between 30 and 60 degrees westerlies
Prevailing winds that blow from the northeast in the Arctic polar easterlies
High speed winds near the top of the troposphere in a narrow belt are known as the Jet Stream.
Maritime air mass forms over water
Continental air mass forms over land
Across North America, warm air masses generally move north and northeastward.
Across North America, cold air masses move south and southeastward.
narrow zone of transition between air masses that differ in temperature or humidity. front
the leading edge of an advancing cold air mass forces itself under and pushes up a retreating warm air mass. cold front
Since cold fronts move fast they often result in in severe weather.
When a warm air mass rises over top of a cold air mass a ________ front is formed warm front
front that occurs when when a warm and cold air mass collides and there is not enough energy for movement stationary front
two cold air masses force a warm air mass up. (a warm front and cold front collide) occluded front
high altitude, wispy clouds made of ice crystals. cirrus
low, flat layered grey clouds that often bring a drizzle. stratus
thick, puffy white clouds with flat bottoms. cumulus
dark towering cumulus clouds that bring lightening and heavy rain. cumulonimbus
A thermometer measures temperature
An anemometer measures wind speed.
A rain gauge measures rainfall.
second layer of the atmosphere, contains the ozone layer Stratosphere
third layer of the atmosphere. Mesosphere
It is the coldest layer of the atmosphere. mesosphere
highest, hottest and largest layer Thermosphere
________________contains the exosphere which is the outer most reaches of the atmosphere thermosphere
is a shift in the winds caused by a rotation in the earth. Coriolis Effect
Local winds are caused by geographical features such as a mountain, lake or an ocean.
High speed winds near the top of the troposphere in a narrow belt are known as the Jet Stream.
measures rainfall. rain gauge
group of the same species that lives in an area at the same time. population
characteristics of an ecosystem that determine how large a population can get. Limiting factors
The largest size a particular population that can be supported by a particular environment is the environment’s carrying capacity.
close long term association between two or more species. Symbiosis
symbiotic realtionship where both organisms benefit. Mutualism
symbiotic realtionship where one benefits and the other is unharmed. Commensialism
where one organism benefits while the other is harmed or killed. Parasitism
group of animal and plant populations living together in the same environment. community
Changes in communities occur over time in a process called ecological succession.
a series of slow, predictable changes in the number and kinds of organisms in an area. Succession
succession when organisms begin to inhabit an area that had no life or soil. Primary
succession an existing community suffers a major disruption but soil is present. Secondary
is the study of the relationship between organisms and their environment. Ecology
is made up of a community and its abiotic (non-living or physical) environment. ecosystem
word that means it is non-living. abiotic
examples of abiotic factors climate, soil, water, air, nutrients, and energy.
examples of biotic factors living substance. Plants, animals, fungus, bacteria, etc.
The_____ is the ultimate source of energy for most ecosystems. sun
organisms that make food by the process of photosynthesis. Producers
Most producers are green plants and algea.
Examples of primary consumer plant-eating animals.
Examples of secondary consumers predators, eat animals.
organisms that break down dead plants and animals into simple nutrients. Decomposers
The model that shows ONE series of energy changes goes through as it is passed from one organism to another is called a food chain
A _________is overlapping networks of food chains. food web
The energy pyramid is a model that shows how much energy passes through organisms
The model that shows that as consumer energy needs increase populations decrease is an ecosystem energy pyramid
when water falls to earth in any form: rain, snow, hail, or sleet. Precipitation
water vapor cools and changes back into liquid droplets, forming clouds. Condensation
when liquid water changes into a gaseous form called water vapor. Evaporation
when water vapor is released through opening in the plant’s leaves called stomata Transpiration
when water, usually from precipitation, flows across the land and collects in rivers, streams then eventually lakes and oceans. Run-off
The energy for the water cycle comes from the sun.
Photosynthesis is the only process in the carbon cycle when carbon is taken out of the environment.
In photosynthesis plants use carbon dioxide and water to make their own food and release oxygen.
Organisms use the food and oxygen, created during photosynthesis, for energy Respiration
Organic material is burned and carbon dioxide and monoxide are released. Combustion
Nitrogen (cannot/can) be used by plants in its natural form CANNOT.
Nitrogen is fixed by bacteria in the soil and lightning
making wise choices with the resources we have Conservation
methods include reducing how much we use, reusing resources when possible and recycling products so the resources are still available to us. Conservation
everything not made by humans that can be used by organisms. Natural resources
can be replaced relatively quickly such as trees and water. Renewable resources
Fossil fuels such as coal, oil, and natural gas are from the remains of once living organisms.
Obtaining and using fossil fuels can cause many environmental problems such as global warming, water pollution acid rain and smog.
Most people use fossil fuels because often cheaper or more convenient
Burning fossil fuels puts large amounts of carbon dioxide in the atmosphere which may increase greenhouse effect creating global warming
Alternative energy sources are being developed to help minimize problems from fossil fuels such as using the sun, wind, moving water,and the heat of the earth
the amount of matter that makes up an object. Mass
Unit mass is measured in grams
the force of gravity acting on the mass of an object. Weight
Weight is measured in what metric unit? Newtons.
the amount of space occupied by an object. Volume
liquid volume is measured with a graduated cylinder using liters.
substances that take the shape of their container, liquids and gases are______ Fluids
an upward force produced by fluids. Buoyancy
The greater the density of the fluid, the greater the buoyant force.
Archimedes’ principle states that the buoyant force on an object is equal to the weight of the fluid the object displaces.
If the object displaces its own weight of the fluid it is in it will float.
the mass of an object compared to its volume. Density
What is measured in grams per milliliter? Density
Objects with a density greater than the fluid it is in will (float or sink)? sink
something that allows a body to do work. Energy
Energy cannot be created or destroyed, it changes form is the law of law of conservation of energy
resistance of a body to a change in its state of motion. Inertia
the energy of motion Kinetic Energy
stored energy due to position (gravitational) or changing shape (spring or bow). Potential Energy
push or pull on an object that will change its state of motion. force
Speed is calculated by (S= Distance ÷ Time)
a force that works against a moving object. Friction
Before starting a lab or activity study the procedure.
What accident or injury should be reported? any
the predicted answer to a scientific question. hypothesis
In a controlled experiment _______ variable(s) should be tested at a time. 1
a simple representation for something complex. model
Factor in the experiment that is purposely changed to test a hypothesis. independent varialble
Factor that may be affected by the one you are testing dependent variable
A(n) ____________is factual information gathered with any of the five senses. observation
_________ is a conclusion made from observations inference
A _______ observation can be measured or counted quantitative
a _______ observation describes qualities (i.e. color, texture, smell etc.) qualitative
a tool to classify organisms or other specimens by characteristics dichotomous key
mass of an object compared to its volume density
Created by: superstephens
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