Homework

Did anyone find another animal with a special adaption for their environment?

www.youtube.com/watch?v=GgB4u6Mgy2M

Today we will..

• Look at Food Chains and create our own

• See how they link together to form a food web

• Revision Quiz

Food Chains

Video

www.youtube.com/watch?v=3Bn7wdCP2v4&feature=youtu.be

Pick out at least 5 key words from the video

Food Chains• Food chains show which organisms

eat other organisms

Grass Rabbit Fox

• The arrows show the transfer of energy from one organism to the next.

Where do we get our energy?

The energy for any food chain comes from the sun

Plants use the suns energy to make food in their leaves through the process of photosynthesis

• Producers - organisms which can make their own energy from carbon dioxide and water using sunlight for energy (plants)

• Primary consumer - organisms which eat producers (herbivores)

• Secondary consumers - organisms which eat primary consumers (carnivores)

• Tertiary consumers - organisms which eat secondary consumers (carnivores)

Decomposers

Feed on dead animals and plants

They are also consumers and do not make their own food

•Bacteria•Fungi•Worms•Dung Beetles

• Each level of a food chain is known as a trophic level• Food chains always start with a producer. Producers

are always on the first trophic level.

Food Chains

Oak Tree

Bark beetle

Wood mouse

Barn owl

Producer

Primary consumer

Secondary consumer

Tertiary consumer

First trophic level

Second trophic level

Third trophic level

Fourth trophic level

Each level of a food chain is known as a trophic level

Activity

Making your own food chain pyramid

Food Web

In nature, single food chains are rare

We have already looked at competition between organisms

In nature food chains are interconnected to form a food web

Food Web

1. Write down two food chains from this food web.

Questions

1. What will happen to the number of clown fish if the sharks become vegetarian?

2. What effect will this have on the number of zooplankton?3. What will happen to the Blue Regal fish if a disease wipes

out the small invertebrates.

Ecology Quiz!

Get into teams of 3-4

You need a pen and paper!