EXAM 1

Question 1

What is the difference between biotic and abiotic?

Answer 1

Biotic- living organism
Abiotic- non-living organism

Question 2

What is sustainability?

Answer 2

Meeting the needs of the present without compromising the ability of future generations to meet their own needs, use our natural resources wisely

Question 3

T/F Population Size – total number of individuals in a population

Answer 3

True

Question 4

T/F When there are more deaths than births, the human populations increase

Answer 4

False

Question 5

What are the factors that affect human population dynamics?

Answer 5

Birth rates, Death rates, immigration, emigration

Question 6

Population Change Equation

Answer 6

Population change = (Immigration + births) – (Emigrations + deaths)

Question 7

What is the population density?

Answer 7

How many individuals are in a certain area

Question 8

T/F Age Structures – Help predict a populations future

Answer 8

True

Question 9

T/F The discovery of Penicillin in (1929) is an example of discovery science

Answer 9

True

Question 10

T/F Charles Darwin’s careful description of the diverse plants and animals he observed in South America is an example of hypothesis-driven science

Answer 10

False

Question 11

What is the crude birth rate?

Answer 11

The number of live births per 1000 people in a population in a given year

Question 12

What is the crude death rate?

Answer 12

The number of deaths per 1000 people in a population in a given year

Question 13

Global Population Growth Rate Equation

Answer 13

Global Population growth rate : (CBR-CDR)/10

Question 14

How many years for a population to double if the growth rate is 1.4?

Answer 14

70 years (Rule of 70) (70/1.4)=50 years

Question 15

What are the 2 population growth models?

Answer 15

Exponential population growth model
Logistic population growth model

Question 16

What is carrying capacity?

Answer 16

Maximum population size that a particular environment can support

Question 17

T/F Logistic growth model is J shaped at first and becomes S shape as soon as it reaches the carrying capacity

Answer 17

True

Question 18

Why is it that the world population grew so fast?

Answer 18

1. Increase in food supply – domestication of plants & animals
2. Disease control – development of vaccines, antibiotics and medicines
3. Good sanitation
4. Expansion of habitat – energy, housing, clothing
5. Improving the quality of water supply and expanding access to it

Question 19

What is ecological footprint?

Answer 19

Is an estimate of the amount of land required to provide the raw materials an individual or nation consumes

Question 20

List four of the biodiversity components.

Answer 20

1. Ecosystem diversity
2. Species Diversity
3. Genetic Diversity
4. Functional Diversity

Question 21

T/F Genetic diversity is the variety of genetic material within a species or a population

Answer 21

True

Question 22

What is the importance of biodiversity?

Answer 22

-Diversity in pollinators & plants enable us to produce more food
-Medical discoveries to cure diseases will be limited if some plants, animals, fungi, bacteria are extinct
-Genetic diversity prevents diseases and helps species adapt to the changes in their environment

Question 23

What are the examples of non-renewable resources?

Answer 23

1. Water
2. Land and air
3. Biodiversity
4. Fossil fuel/energy

Question 24

T/F About 70% of the commercial energy used in the world and in the United States comes from nonrenewable energy resources

Answer 24

False (90%)

Question 25

T/F Energy conservation means reducing or eliminating the unnecessary wasting of energy

Answer 25

True

Question 26

What is science?

Answer 26

A way of knowing the natural world

Question 27

What are the 2 main scientific approaches?

Answer 27

Discovery and Hypothesis science

Question 28

T/F discovery science is mostly about explaining nature

Answer 28

False (Describing not Explaining)

Question 29

The scientific method approach is best described by which of the following in the correct order

Answer 29

1. Observation, Question, Library Research, Hypothesis, Experimentation, Analysis

Question 30

How does the US rank in terms of the world’s most populous country?

Answer 30

3rd (US) 1st (India) 2nd (China)

Question 31

What are the steps of the scientific method?

Answer 31

Observation, Question, Library Research, Hypothesis, Experimentation, Analysis, Interpret

Question 32

List 3 sources of the Literature Resarch?

Answer 32

1. Primary 2. Secondary 3. Tertiary

Question 33

Assume your results reject your initial hypothesis as indicated. What will you do next?

Answer 33

Change the hypothesis

Question 34

List four causes of world hunger.

Answer 34

1. Poverty – no financial resources 2. Conflict – war/political instability 3. Climate Change – extreme weather affecting crop yields 4. Economic inequality 5. Poor infrastructure 6. Population growth

Question 35

Discovery science vs Hypothesis Science

Answer 35

Discovery describes nature, Hypothesis explains nature

Question 36

What is the ground water?

Answer 36

Water that sinks into the soil and is stored in slowly flowing and slowly renewed underground reservoirs called aquifers

Question 37

T/F At present, about 40-50% of accessible fresh water in the US is used to grow crops and raise livestock

Answer 37

False (70-80%)

Question 38

What is agricultural sustainability?

Answer 38

Produce abundant food without depleting the earth’s resources or polluting the environment