The Anthropocene

Question 1

it took more than _____ years to reach a human population of 1 billion

Answer 1

100,000 years

Question 2

today, earth supports a population of over ____ people

Answer 2

7 billion

Question 3

which countries are the top 3 users of energy?

Answer 3

canada
united states
sweden

Question 4

which countries are the lowest 3 users of energy?

Answer 4

bangladesh
kenya
india

Question 5

overall, earth’s surface temperatures have increased by about _____

Answer 5

1 degree celsius

Question 6

higher latitudes have warmed more than those near the equator. true or false

Answer 6

true

Question 7

could volcanoes or the sun be contributing to the earth’s heating?

Answer 7

NO

• volcanic emissions would cool the planet
• the suns oscillations are of little contribution

Question 8

in the last 30 years, how many species have been lost in the great barrier reef?

Answer 8

more than 1/2

Question 9

what are CO2 levels before vs now?

Answer 9

315 ppm 40 years ago

390 ppm now

Question 10

how has the pH of the ocean changed?

Answer 10

more acidic now
30% increase in ions (0.1 pH unit drop)
nutrient leaching and failure to build calcium skeletons

Question 11

crop and pasture lands cover ___ of our earth’s surface area?

Answer 11

1/4