Homework 1+2 Flashcards
A hypothesis is based off scientific knowledge T/F
True
A potential, testable answer to a scientific question is called a(n) ______
Hypothesis
Experimental evidence that agrees with your prediction supports your hypothesis T/F
True
Which of the following are part of the scientific investigation process?
a. making observations
b. forming a hypothesis
c. communicating results
d. asking a question
a. making observations
b. forming a hypothesis
c. communicating results
d. asking a question
A ______ consists of organisms of the same species that live in the same area and interact with one another. Two or more of these make up a community.
Population
A ______ consists of two or more populations of different species that live in the same ecosystem and interact with one another.
Community
The _______ consists of all the organisms on Earth and the areas in which they live.
a.atmosphere
b.geosphere
c.hydrosphere
d.biosphere
d.biosphere
Which of the following are examples of abiotic factors?
a. soil
b. temperature
c. protists
d. sunlight
a. soil
b. temperature
d. sunlight
Which of the following are heterotrophs?
a. herbivores
b. carnivores
c. scavengers
d. omnivores
a. herbivores
b. carnivores
c. scavengers
d. omnivores
What types of organisms can be a consumer?
a. bacteria
b. animals
c. fungi
a. bacteria
b. animals
c. fungi
Which of the following are types of consumers?
a. omnivores
b. carnivores
c. chemoautotrophs
d. herbivores
a. omnivores
b. carnivores
d. herbivores
Which of the following breaks down the remains of dead organisms and wastes and releases simple inorganic molecules back into the environment?
a. producer
b. decomposer
c. consumer
b. decomposer
A food web is a diagram of feeding relationships that includes multiple intersecting food _______.
Chains
Food chains demonstrate the flow of ______ and material through ecosystems.
Energy
Food chains explain how energy and matter move through ecosystems. T/F
True
Decomposers will get their energy consuming organic matter at each level in a food web. T/F
True
The ecological pyramid depicts how biomass and energy increase from lower to higher trophic levels. T/F
False
Only about ___ percent of the energy at one trophic level is available to the next level.
10
The length of a food chain is the number of links between consumers. T/F
True
Ecological pyramids depict the relative amount of energy available at each trophic level in an ecosystem. T/F
True
________ resources can be replenished as quickly as humans use them.
Renewable
A _________ resource is not regenerated or restored on a time scale comparative to its consumption.
Non-renewable
Petroleum, coal, and natural gas are _____.
a. Renewable
b. Nonrenewable
c. Man-made resources
d. None of the above
b. Nonrenewable
______ resources exist in fixed amounts.
a. Nonrenewable
b. Renewable
c. Both A and B
d. None of the above
a. Nonrenewable
Carbon plays an important role in the structure of all living cells. T/F
True
During the carbon cycle, carbon is stored in both the atmosphere and in living organisms. T/F
True
What is the greatest source of carbon that enters the ocean from the atmosphere?
a. carbon dioxide
b. carbon monoxide
c. bicarbonate ions
d. glucose
a. carbon dioxide
The process through which carbon is recycles through living organisms, the atmosphere, and other parts of the biosphere is called the ______ cycle.
Carbon
Fossil fuels release gas in the air when burnt, which is a major cause of ______.
a. Global Warming
b. Temperature decline
c. Increase in polar icecaps
d. None of the above
a. Global Warming
The ______ effect occurs when gases in the atmosphere radiate the sun’s heat back down to Earth’s surface.
Greenhouse
The current analysis suggests that the combustion of fossil fuels is a major contributor to the greenhouse effect. T/F
True
One reason that solar and wind energy are environmentally friendly is because they have ______.
a. Low carbon emissions
b. High carbon emissions
c. No carbon emission
d. None of the above
c. No carbon emission
Several advances in science and technology led to lower ______ rates in 18th century Europe and North America.
Death Rates
Which of the following has/have contributed to increase human population growth?
a. The Industrial Revolution
b. Advances in agriculture
c. Advances in sanitation
d. All of the above
d. All of the above
The death rate is rising as a result of improved food production and storage. T/F
False
If the gap between birth death rates widens, the human population size will change very slowly. T/F
False
In the early 1800s, world population reached the 7 billion mark. T/F
False
Significant human population growth on the African continent over the next fifty years is likely to improve food accessibility for all African countries. T/F
False
According to the U.S. Census Bureau, India will be the most populous nation, surpassing CHina sometime around 2025. T/F
True
The main reason for negative population growth is a high fertility rate. T/F
False
