2Q.1 CHEMISTRY

Question 1

Global changes are triggered by human activities: (5)

Answer 1

1. Habitat loss and fragmentation
2. Over harvesting
3. Pollution
4. Altered nutrients cycling
5. Invasive species and interaction

Question 2

Term used to describe the biological diversity at a variety of different scales

Answer 2

Biodiversity

Question 3

Play essential roles in ecosystems

Answer 3

Species

Question 4

Direct effects on species and ecosystems: (3)

Answer 4

1. Habitat loss/Degredation
2. Overexploitation
3. Spread of non-native species/disease

Question 5

Wide reaching effects on biodiversity:

Answer 5

1. Climate change
2. Pollution
3. Deforestation
4. Overexploitation

Question 6

IUCN stands for…?

Answer 6

International Union for Conservation of Nature

Question 7

__ of all species are threatened with extinction?

Answer 7

One-third ⅓

Question 8

…am

Question 9

__ amphibians

Answer 9

29%

Question 10

__ mammals

Answer 10

21%

Question 11

__ of birds

Answer 11

12%

Question 12

Is the increase in average temperature of Earth’s surface

Answer 12

Global warming

Question 13

Major cause of global warming

Answer 13

Greenhouse effect

Question 14

Discovered greenhouse effect back in 1824

Answer 14

Joseph Fourier (1824)

Question 15

The greenhouse effect was first investigated by __?

Answer 15

Svante Arrhenius (1896)

Question 16

Process by which absorption & emission of infrared radiation by atmospheric gases warm the planet’s lower atmosphere and surfacr

Answer 16

Greenhouse effect

Question 17

Natural causes of extinction: (4)

Answer 17

1. Climatic heating & cooling
2. Changes in sea levels & currents
3. Asteros and cosmic radiation
4. Acid rain