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killing means harming something causing death
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logging is when humans cut down trees / forests for wood
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harming an animal species has a negative impact on the population size of that species
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ecosystem can mean environment
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hunting is when a human kills an animal for food / recreation in the wild
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limiting a source of something tht has a negative impact on something else has a positive impact on that something else
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eating food that contains pesticides can have a negative impact on the health of an animal
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a crop is a kind of food
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a human is a kind of animal
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if something required for a process is not produced then that process is prevented from occurring / cannot occur
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reproduction of the plants often requires pollen
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sexual reproduction produces offspring with genetic material from both parents
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corn is a kind of plant
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a crop of corn plants is genetically modified to produce a natural pesticide
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corn plants reproduce through sexual reproduction
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a deer is a kind of animal
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protecting a living thing has a positive impact on that living thing 's survival / health
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killing means harming something causing death
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attracting something to a location causes that something to be near that location
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if an animal is near a road then that animal might be killed by a car
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feeders attract animals to a location
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negative impact is the opposite of positive impact
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a road is a kind of location
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an animal is a kind of living thing
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harming something has a negative impact on / effect on that something
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plankton live in bodies of water
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in the food chain process some types of plankton have the role of producer
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a factory dumped mercury into a bay
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microorganisms change mercury in a bay into a form that plankton can use
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an element is a kind of material
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a bay is a kind of body of water
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mercury is a kind of element
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producers pass materials they use through the food chain
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when available resources decrease in an environment , organisms have to conserve those resources
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drought is when available water decreases in an environment
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a plant is a kind of organism
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if a crop requires less water then that crop will survive in a drought
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planting crops is a kind of activity
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a organisms require water for survival / to grow
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water is a kind of natural resource
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crops are a kind of edible plant for eating
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a light bulb is a kind of tool for seeing in the dark
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something that has a positive impact on something else is a kind of benefit
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if an object is discarded in a landfill then that object is trash
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to dispose of something can mean to discard something
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a light bulb is a kind of object
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humans move waste to a landfill for disposal / storage
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as the time a tool lasts increases , the number of tools discarded will decrease
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decreasing something negative has a positive impact on a thing
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landfills have a negative impact on the environment
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if a human discards an object then that object will become waste
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something positive is desirable
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as a system / device grows old , the amount of energy will used by the system / device will increase
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energy is a kind of resource
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old is the opposite of new
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using less of a resource has a positive impact on the resource
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an impact is a kind of result
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a heating system is a kind of energy resource
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to use less of something means decreasing the use of something
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energy is used for heating a building by a heating system
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recyclable means a material can be recycled / reused many times
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aluminum is recyclable
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climate is the usual kind of weather in a location over a period of time
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temperature is a property of weather
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heat means temperature increase
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warmer means greater / higher in temperature / warmth
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if something causes something else to increase, then increasing that something will cause that something else to increase
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the greenhouse effect is when carbon in the air heats a planet 's atmosphere
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the atmosphere is made of air
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carbon dioxide contains carbon
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the atmosphere is made of air
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warmer means greater / higher in temperature / warmth
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the greenhouse effect is when carbon in the air heats a planet 's atmosphere
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temperature is a property of weather
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carbon dioxide contains carbon
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if something causes something else to increase then increasing that something will cause that something else to increase
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climate is the usual kind of weather in a location over a period of time
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heat means increase in temperature
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if the atmospheric temperature rises then the glaciers will melt
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a shore is the land found at the edge of a body of water
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the atmosphere is the air around the entire planet
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as the amount of water in a body of water increases , the water levels will rise / increase especially at the edge of that body of water
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as the level of water rises , the amount of available land will decrease
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loss of something means a decrease of something
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amount of water in a body of water increases by storms / rain / glaciers melting / snow melting / ice melting
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global warming is when worldwide temperature increases
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worldwide refers to something that covers the entire planet
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gases released during the use of fossil fuels causes global warming
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oil is a source of gasoline
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oil is a kind of fossil fuel
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amount of water in a body of water increases by ice caps melting
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an ocean is a kind of body of water
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as the amount of water in a body of water increases , the water levels will rise / increase especially at the edge of that body of water
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a wooded area is a kind of forest
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an animal requires a habitat for survival
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a tree is a kind of habitat
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a wooded area contains lots of trees
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clearing an area is a kind of method for changing an area
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a forest is a kind of environment
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humans changing an environment sometimes causes that environment to be destroyed
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