Slides Pt3

Question 1

What if one species becomes extinct in a web

Answer 1

The whole web MAY be affected OR another species may fill the niche.

Question 2

Ecological pyramids

Answer 2

The amount of energy or matter in an eco system can be represented by a pyramid

An ecological pyramid is a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web

1. Energy
2. Biomass
3. Numbers

Question 3

Why are food chains so short

Answer 3

There is a limited amount of energy stored from the sun. Organisms high on the food chain risk starvation if food supplies run out.

Question 4

Interconnected- Man’s Impact

Answer 4

depletion of food 
destruction of habitats 
natural disaster clean up
pollution 
population increase 
Urbanization
Pesticides
Domestication of animals
farming

Question 5

HUMAN IMPACT

Answer 5

As our population continues to grow we compete with other species for essentials like
space
food
Water

… but do we really “compete?”

Question 6

Keystone species:

Answer 6

Species that have a dramatic effect on the structure of a food web.

Question 7

Biogeochemical Cycles

Answer 7

Biogeochemicals include substances that are recycled through the ground (above and below) and the atmosphere
The four we will be concentrating on are:
Water
Nitrogen
Carbon
And the flow of energy

Question 8

Water Cycle (Rap)

Answer 8

Precipitation
Condensed water vapor that falls to the Earth’s surface.
Runoff
The variety of ways by which water moves across the land.
Infiltration/Percolation
The flow of water from the ground surface into the ground.
Evaporation
The transformation of water from liquid to gas phases as it moves from the ground or bodies of water into the overlying atmosphere
**Transpiration- Evaporation of water from plant leaves. Water leaves through the stomata. **
Condensation
The transformation of water vapor to liquid water droplets in the air, producing clouds and fog.

Question 9

Carbon Cycle (song)

Answer 9

Decomposition/deposition
Burning fossil fuels
respiration
Photosynthesis

Question 10

Nitrogen Cycle

Answer 10

Nitrogen fixation by bacteria

Human Impact- fertilizers

Question 11

Energy Cycle

Answer 11

Photosynthesis
Cellular Respiration
Chemosynthesis
ATP

Question 12

Plankton

Answer 12

Zooplankton- small ocean animal organism

Phytoplankton- small ocean plant organism

Phytoplankton → zooplankton