science mid term
Where can decomposers fit in the food chain?
A. at any point
As doubling time increases, the population growth rate ______.
A. decreases
As plates slide past each other at a transform fault boundary, they _____________
A. have a tendancy to stick.
The pathway of energy through ecosystems is light > chemical > mechanical > ________.
A. heat
If a pesticide does not break down easily or quickly in the environment, it is said to have ___________.
A. persistence
In a food chain, which refers to an organism that eats only plants?
A. primary consumer
This is an important chemical property of soil because it affects the availability of nutrients to plants and the activity of soil microorganisms.
A. soil pH
The surface mining method that removes tops of mountains and allowing the debris to fall to the valley below is called the ____________.
A. the Mountaintop Removal Method
Ninety-nine percent (99%) of weather occurs in the __________
A. troposphere
What happens at a convergent boundary?
B. Plates move together.
An animal like a wolf, that feeds exclusively on other animals is _____________
B. a carnivore.
The Marianas Trench is _______
B. an example of a subduction zone.
Which of the following is an example of an r-selective species?
B. ants
Identify the method of soil preservation.The alternating planting of crops in a location to avoid mineral depletion is
B. crop rotation
Because of the ___________ of our planet, sunlight strikes the Earth with varying intensities.
B. curvature
Which term means, "changes over time"?
B. ecological succession
What are the two main driving processes of the water cycle?
B. evaporation & precipitation
If we stopped using ALL pesticides, food costs would _____.
B. increase by 50%
Identify one negative impact of an increasing human population.
B. loss of habitat
Energy is a __________ pathway.
B. one-way
In a glucose molecule, the carbon di-hydrogen bond is a __________________________.
B. strong energy bond
The state of the atmosphere with respect to wetness or dryness, calm or storm in an area is a determination of ____________ for that area.
B. the weather
The ____________ has the least amount of nutrients available.
C. B Horizon
Which of these water sources is not considered part of the groundwater system?
C. River
Why is the open ocean considered to be a "biological desert"?
C. There is a lack of nutrients
"Zero Population Growth" or "ZPG" indicates that birth rate, emigration, death rate and immigration are all ___________.
C. balanced
Which of the following is an example of the tragedy of the commons?
C. catching fish in the ocean
Organic material in soil contains a substance called "humus". Humus is defined as _____________.
C. dark organic matter that forms when plant and animals decay
All of the following are principles of smart growth EXCEPT _____.
C. few housing choices
Agriculture can contribute to depletion of aquifers because ___________.
C. irrigation water often comes from groundwater
Usually, deforestation replaces a biodiverse ecosystem with a(n) _______ ecosystem
C. less diverse
If an ecosystem A has MORE resources than ecosystem B, the carrying capacity will be __________.
C. lower in ecosystem B than ecosystem A
Which organism in a food web is the same as a heterotroph?
C. primary consumer
A soil pyramid is used to determine soil _______.
C. texture
The largest natural sink of nitrogen is ___________ .
C. the atmosphere
The area of land that supplies water to an aquifer is called _______.
C. the recharge area
The Green Revolution began around
D. 1950-1970
Exponential growth can lead to a lack of resources, which causes population size to decline. This is an example of:
D. a negative feedback loop
The goal of Integrated Pest Management is to ____ pests.
D. control
The zone of __________ is when factors are in a range in which an organism cannot survive.
D. intolerance
Which atmospheric gas is the most visible?
D. water vapor
Which biome has lost 95-99% of its natural habitat due to farming and ranching?
grassland