Chapter 14 - The Human Disconnection Flashcards Preview

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Flashcards in Chapter 14 - The Human Disconnection Deck (25)
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1

About how many human beings currently live on this planet?

About 7 Billion

2

When did people realize keeping animals and crops would lead to more abundant food supplies?

About 10 thousand YA

3

True or False? Human population growth has exploded over the years with a annual rate over 3 percent? In 1804 it was 1 Billion and we add 1 billion every 12 years?

TRUE

4

Holocene?

The most recent Epoch of the Cenozoic. Following the Pleistocene, it's estimated to have begun about 10,00 ya

5

True or False? Today there is more carbon dioxide in the earths atmosphere than at any other time in the last 800k years

True

6

Coral reefs constitute the most diverse marine ecosystems on earth, containing up to what percent of all ocean dwelling species?

25%

7

Co2 emissions and ocean acidity is destroying coral reefs. True or False?

True

8

Unless major action is taken, ocean systems will be severely effected by when?

2050. Which won't be good. 20-25% of our food protein comes from the ocean.

9

When did some human groups begin to settle down and abandon nomadic lifestyles?

15k ya. But they didn't start farming and growing crops until 10k ya.

10

What is Co2?

Carbon Dioxide

11

True or false? We add 1 billion people every 12 years.

True

12

T or F? Population increase occurs as a function of some percentage ( in developing countries, the annual rate is over 3 percent).

T

13

T or F? The earth has changed over time but in the last 100 years since industrialization, we've started warming planet QUICKLY releasing CO2 and harming environment.

T

14

Where is the great barrier reef?

Australia

15

What happens when reefs are destroyed due to climate change?

Reefs contain a lot of life. Destroying their home and life destroys a food source for human beings.

16

Trees give off what to help life?

Oxygen, which humans inhale. We give them carbon dioxide.

17

When there are less trees and and plant life is destroyed what happens?

Less oxygen.

18

True or false? More CO2 now than at any other time in the last 800k years

True

19

True or false? DDT almost caused the extinction of the American bald eagle, the bird featured on the Great Seal of the United States.

true

20

True or False? We can expect more acidification.

True. The Co2 alters the ph level of the rain and other life, we can have acid rain.

21

co2 levels will reach those we havent seen in several million years. T or F

T

22

Longer effects of climate change...

...

23

T or F? Humans are the product of mil-lions of years of biocultural evolu-tion, but in just the last few hun-dred years have exerted huge influences on other life- forms and the planet itself, unlike that by any other organism in the history of life.

T

24

T or F? A major contributor to the scope of recent human disruptions of the earth’s ecosystems is population growth.

T

25

T or F? Probably the most immediate and crucial challenge we face is to rap-idly slow our harmful influence on global climate change, including that from warming of the atmo-sphere and acidification of the ocean.

T