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Science 7 Chapter 18
Man's Relationship with the Environment
Terms in this set (43)
organisms that convert energy from the sun into the stored energy of sugar
an animal that might soon become extinct
primary treatment of sewage
solid wastes are removed
their new characteristics may not help them in the wild
Why won't most domesticated organisms survive in the wild?
plants (including soy) that have bacteria living in their roots that take nitrogen from the atmosphere and make it available to the plants
an increase in the birthrate and a decrease in the death rate
What would result in a population increase?
waste from nuclear reactors; nonbiodegradable insecticides; chemicals from dry cleaning shops
constant rate of increase
God gave man dominion over the earth; we should be wise stewards of the resources God has given us; we need to understand the science surrounding ecological issues
What should be considered when making ecological decisions?
where most cities dispose of their trash
examples of fossil fuels
coal, oil, and natural gas
the killing of old or very sick people
can be replanted and are an example of a renewable resource
light, heat, sound
forms of energy pollution
thought to have developed from the remains of plants and animals that once lived on the earth
plastic and glass
What would all ecosystems stop functioning without?
liquids, solids, or gases
What forms do air pollutants come in ?
main barrier to completely treating sewage
most abundant air polutant
decrease in death rate
What has affected human population growth in the past few decades?
limiting growth factors
What affects the growth of a population?
it can transmit certain diseases
What is one danger of water pollution?
the science of growing crops and livestock
a method of farming in which a farmer changes the kinds of crops he grows in a particular field every few years
the loss of soil fertility due to a loss of nutrients in the soil
organisms that people raise primarily for their own uses
a species that has died out
a substance that contains the nutrients needed by plants
usable materials that people can obtain from the physical world
the type of resource that, once used, is gone forever
the type of resource that can be replenished
the soil's ability to sustain crops
the preservation and wise use of natural resources
a combination of smoke, automobile exhaust, and fog that is common in many large cities
pollutants that can be broken down by decomposers in an ecosystem
the movement of individuals into an area
when a population is no longer capable of further growth
the addition of impurities to an ecosystem
using materials again instead of disposing of them
Producers capture light energy from the sun and store it in the form of sugar, which humans use for food, and give off oxygen during photosynthesis, which humans breathe. Plants are also used for clothing, building, and medicines. Consumers are a food source for humans. They also provide clothing, transportation, and labor. Decomposers break down dead organic matter and recycle the materials so they can be used again.
In what ways do humans rely on producers, consumers, and decomposers?
The Bible condemns the killing of innocent human life (Rom. 13:9), regardless of the motivation behind it. Therefore, abortion and euthanasia are wrong. Also, God has promised to care for our needs (Phil. 4:19). This does not mean that we can abuse natural resources; we should still be good stewards of the resources God has provided for us. Christians should also do what we can to meet others' needs and share the gospel.
How would you respond to those that believe that if present levels of human population growth continue, natural resources will become depleted and humans will eventually become extinct and use these as reasons to promote abortion and euthanasia?
Sewage is made mostly of biodegradable materials, and decomposers break down biodegradable pollutants. During the secondary sewage treatment, decomposers are used to break down the biodegradable pollutants in the water.
How can decomposers help in the treatment of sewage?
THIS SET IS OFTEN IN FOLDERS WITH...
Science 7 Chapter 14
Science 7 Chapter 15
Science 7 Chapter 16
Science 7 Chapter 17
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