Homework 1+2

Question 1

A hypothesis is based off scientific knowledge T/F

Answer 1

True

Question 2

A potential, testable answer to a scientific question is called a(n) ______

Answer 2

Hypothesis

Question 3

Experimental evidence that agrees with your prediction supports your hypothesis T/F

Answer 3

True

Question 4

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

Answer 4

a. making observations
b. forming a hypothesis
c. communicating results
d. asking a question

Question 5

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.

Answer 5

Population

Question 6

A ______ consists of two or more populations of different species that live in the same ecosystem and interact with one another.

Answer 6

Community

Question 7

The _______ consists of all the organisms on Earth and the areas in which they live.
a.atmosphere
b.geosphere
c.hydrosphere
d.biosphere

Answer 7

d.biosphere

Question 8

Which of the following are examples of abiotic factors?
a. soil
b. temperature
c. protists
d. sunlight

Answer 8

a. soil
b. temperature
d. sunlight

Question 9

Which of the following are heterotrophs?
a. herbivores
b. carnivores
c. scavengers
d. omnivores

Answer 9

a. herbivores
b. carnivores
c. scavengers
d. omnivores

Question 10

What types of organisms can be a consumer?
a. bacteria
b. animals
c. fungi

Answer 10

a. bacteria
b. animals
c. fungi

Question 11

Which of the following are types of consumers?
a. omnivores
b. carnivores
c. chemoautotrophs
d. herbivores

Answer 11

a. omnivores
b. carnivores
d. herbivores

Question 12

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

Answer 12

b. decomposer

Question 13

A food web is a diagram of feeding relationships that includes multiple intersecting food _______.

Answer 13

Chains

Question 14

Food chains demonstrate the flow of ______ and material through ecosystems.

Answer 14

Energy

Question 15

Food chains explain how energy and matter move through ecosystems. T/F

Answer 15

True

Question 16

Decomposers will get their energy consuming organic matter at each level in a food web. T/F

Answer 16

True

Question 17

The ecological pyramid depicts how biomass and energy increase from lower to higher trophic levels. T/F

Answer 17

False

Question 18

Only about ___ percent of the energy at one trophic level is available to the next level.

Answer 18

10

Question 19

The length of a food chain is the number of links between consumers. T/F

Answer 19

True

Question 20

Ecological pyramids depict the relative amount of energy available at each trophic level in an ecosystem. T/F

Answer 20

True

Question 21

________ resources can be replenished as quickly as humans use them.

Answer 21

Renewable

Question 22

A _________ resource is not regenerated or restored on a time scale comparative to its consumption.

Answer 22

Non-renewable

Question 23

Petroleum, coal, and natural gas are _____.
a. Renewable
b. Nonrenewable
c. Man-made resources
d. None of the above

Answer 23

b. Nonrenewable

Question 24

______ resources exist in fixed amounts.
a. Nonrenewable
b. Renewable
c. Both A and B
d. None of the above

Answer 24

a. Nonrenewable

Question 25

Carbon plays an important role in the structure of all living cells. T/F

Answer 25

True

Question 26

During the carbon cycle, carbon is stored in both the atmosphere and in living organisms. T/F

Answer 26

True

Question 27

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

Answer 27

a. carbon dioxide

Question 28

The process through which carbon is recycles through living organisms, the atmosphere, and other parts of the biosphere is called the ______ cycle.

Answer 28

Carbon

Question 29

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

Answer 29

a. Global Warming

Question 30

The ______ effect occurs when gases in the atmosphere radiate the sun's heat back down to Earth's surface.

Answer 30

Greenhouse

Question 31

The current analysis suggests that the combustion of fossil fuels is a major contributor to the greenhouse effect. T/F

Answer 31

True

Question 32

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

Answer 32

c. No carbon emission

Question 33

Several advances in science and technology led to lower ______ rates in 18th century Europe and North America.

Answer 33

Death Rates

Question 34

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

Answer 34

d. All of the above

Question 35

The death rate is rising as a result of improved food production and storage. T/F

Answer 35

False

Question 36

If the gap between birth death rates widens, the human population size will change very slowly. T/F

Answer 36

False

Question 37

In the early 1800s, world population reached the 7 billion mark. T/F

Answer 37

False

Question 38

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

Answer 38

False

Question 39

According to the U.S. Census Bureau, India will be the most populous nation, surpassing CHina sometime around 2025. T/F

Answer 39

True

Question 40

The main reason for negative population growth is a high fertility rate. T/F

Answer 40

False