Matching
The nonliving things in the biosphere.
Things that are living or that were once living in the biosphere.
Abiotic factors.
Biotic factors.
In October samples on water were taken from Lake Wobegon. Test showed that the temperature was 15° C (59° F). The dissolved oxygen was 10 ppm, the ammonia content was 0.25 ppm, the nitrate content was 3 ppm, and the pH of the water was 6.2. How healthy was the lake's ecosystem?
The cold temperature and dissolved oxygen and ammonia levels are good, but the nitrate content is high. This means that a number of organisms will die of suffocation because nitrates prevent red blood cells from carrying oxygen throughout the blood. The pH is low, indicating acid rain effects. This will harm much of the plant and animal life in the lake.
Examples of abiotic factors in a freshwater stream include...
a. rocks.
b. snails.
c. algae.
d. all of the above.
A (rocks)
Draining wetlands is unwise because wetlands prevent floods, purify water, and are a habitat for many creatures.
True.
What is the smallest country with a coastline?
Monaco.
The number of individual organisms of one species in a community.
A system in which organisms and their environment interact.
Population density.
Ecosystem.
Explain how a high population density of one species would affect a community in an ecosystem.
That species might exhaust their food supply, so some would die of starvation. Species that feed on them would probably flourish.
Areas between ecosystems are called...
a. transition zones.
b. wetlands.
c. abiotic factors.
d. none of the above
A (transition zones)
God sustains the biosphere in such a way that the abiotic factors interact only with other abiotic factors and the biotic factors interact only with biotic factors.
False. The abiotic and biotic factors interact with each other.
Which type of cloud is likely to bring a tornado?
A cumulonimbus.
Organisms of the same species living in a community.
The term used to describe the amount of the minerals magnesium and calcium in water.
Population.
Water hardness.
List two ways that creatures are structured to flourish in fast-moving streams.
Plants have strong root systems. Insects have suckers or hooks to attach themselves to rocks. Fish are streamlined to allow the water to flow around them.
Pollutants that prevent the red blood cells of creatures living in water from carrying oxygen are...
a. Ammonia.
b. nitrates.
c. acid rain.
d. dissolved oxygen.
B (Nitrates)
Twigs and leaves that fall into streams enrich the nutrient supply of the stream.
True.
How many miles away is the planet Neptune away from the sun?
2.8 billion miles
The maximum number of organisms in a population that an environment can support over a long period of time.
Microscopic organisms that live near the surface of the water.
Carrying capacity.
Plankton.
Choose one of the following habitats: ponds, streams, deep northern lakes, or wetlands. Describe three organisms that are found in that habitat and their relationship to one another. How does each one successfully live in that habitat?
Example:
Stream – plants, fish, bear: plants produce oxygen for the fish and will be food for others. Bear catches fish for food.
The mortality pattern of many animals shows a high death rate...
a. throughout life.
b. before birth.
c. middle in life.
d. early in life.
D (early in life)
Warm water holds more oxygen than cold water does.
False. Cold water holds more oxygen than warm water does.
What is the scientific name of a great white shark?
Carcharodon carcharias
The part of Earth and its atmosphere in which living organisms exist.
The place where the organism has an advantage over other organisms.
Biosphere.
Preferred habitat.
Name three characteristics of water that allow it to support life, and explain why they are important.
When solid, it is less dense than liquid, so ice floats on the surface, allowing life below it to survive the cold weather. It is transparent, so photosynthesis can go on below the surface of the water. The turbulence of flowing streams mixes oxygen into water, allowing animals to live in the water.
Freshwater ecosystems contain creatures from the following groups:
a. amphibians, arthropods, plants, and protozoans.
b. crustaceans, reptiles, fish, and mammals.
c. Insects, mollusks, birds, and worms.
d. All of the above
D (All of the above)
The carrying capacity for plants depends on how strong the plant stems are.
Discuss the effects of water hardness, temperature, and sediments on freshwater ecosystems and the organisms that live in them.
Water hardness – a measure of certain minerals in the water (calcium and magnesium).
Organisms – especially fish and mollusks, require these minerals.
Warm water – holds less oxygen, so warm factory wastes and more sunshine effect O2 levels for organisms.
Sediments – clog fish gills, block sunlight for photosynthesis, and fill in habitats for small creatures, such as insects and worms.