Unit 2.5: Marine Life

Bell Work Nov 6

Agenda:

1.Planner: Choose your animal for the Oceans Animal Project by Nov 102.Bell Work3.Good Things4.Notes5.The Blue Planet: Episode 2

Ocean Zones

• Life zones in the ocean are determined by the depth to which light can penetrate• How is life connected to availability to light?

Photosynthesis and Nutrients

• Photosynthesis is the process by which plants use

water plus carbon dioxide and energy from the

sun to make food.

• Photosynthesis NEEDS the sun to happen

• Many animals eat plants, these animals can only

live where plants live

The Zones of the Ocean

1. Sunlight Zone: the part of the ocean that extends from the surface to about 200 meters

• This is the only part of the open ocean that receives enough sunlight to support the growth of algae• Algae are the base food of open-ocean food webs• Animals that feed on algae: krill, young crabs, mollusks,

fish

Zone of the Ocean #2

2. Twilight Zone: the part of the ocean that extends from the bottom of the sunlight zone to about 1km.

•This water is darker and colder than the sunlight zone. Why?

Zones of the Ocean #33. Dark Zone: the part of the ocean that extends from about 1km or from the bottom of the twilight zone to the ocean floor.

•Darker and colder than the twilight zone•Harsh conditions, few organisms live here•Some animals use bioluminescence to help find food• Bioluminescence – making their own light!

Ocean Zones Picture

The Blue Planet

•Episode 2: The Deep

Bell Work Nov 6

Agenda:

1.Planner: Choose your animal for the Oceans Animal Project by Nov 102.Bell Work3.Good Things4.Finish: The Blue Planet: Episode 2

Bell Work Nov 10

Agenda:

1.Planner: Don’t begin research until I give my lesson on research techniques on Thursday2.Bell Work- Survey3.Good Things4.Sign up for Animal5.Sign up for Presentation Time6.Notes- Classification of Marine Animals

Bell Work:1.Complete Survey, do NOT write your name on it

Classification of Life in the Ocean

• Scientists classify marine organisms according to where they live and how they move. • Plankton: are tiny algae and animals that float in

the water and are carried by waves and currents• Algae (Plant) Plankton: need photosynthesis to make

their own food• Animal plankton (Zooplankton): microscopic crustaceans,

and some tiny young fish

Nekton

• Free- swimming animals that can move throughout the water column• Squid, most fish, and marine mammals such as

whales and seals

Benthos

• Organisms that inhabit the ocean floor• Crabs, sea stars, octopi, lobsters• Sponges, sea anemones

Food Chain• Algae Plankton is at the bottom of the

food chain- uses sun to make food during photosynthesis• These are called Producers

• Everything else is a consumer• They consume other organisms to

get food

• Zooplankton and some benthos eat algae plankton

• Decomposers: some organisms break down wastes ant the remains of other organism