CLASSIFY ORGANISMS AS PRODUCERS, CONSUMERS, SCAVENGERS, OR DECOMPOSERS ACCORDING TO THEIR ROLE IN A FOOD CHAIN OR A FOOD WEBSPI0607.2.1

• All living things need energy to survive.

• Scientists have organized organisms based on how they obtain energy.

Producers:A producer uses sunlight to make food through photosynthesis.

Consumers:Organisms that EAT producers OR other organisms for energy.

There are four main types.1. Herbivores- eats plants2. Carnivores-eats only

animals3. Omnivores- eats both

plants and animals4. Scavengers- eats on bodies

of dead animals

Decomposers:Nature's recycler.Break down the remains of dead organisms (producers and consumers) that scavengers leave behind.

FOOD WEB

Energy pyramid

FOOD CHAINS, ENERGY PYRAMIDS, FOOD WEBS

• All three show how energy is transferred in ecosystems and are related.

• A food chain is simple and it rarely happens in nature. Why? Because most organisms have competitors that hunt or eat the same foods.

• A food web is the overlapping of food chains. These show many organisms that consume the same things (competitors).

• Energy pyramids show the loss of energy at each level of a food chain.

INTERPRET HOW MATERIALS AND ENERGY ARE TRANSFERRED THROUGH

AN ECOSYSTEM.SPI0607.2.2

ENERGY TRANSFER

IDENTIFY THE BIOTIC AND ABIOTIC ELEMENTS OF THE MAJOR BIOMES

SPI0607.2.3

• Abiotic: without life (no cells)• Biotic: with life (has one or more cells)

• Six biomes• Tropical Rainforest- hot, moist air (abiotic example),

Bangui bamboo, silvery gibbon (biotic examples)• Deciduous Forest- deep soil layers, rich nutrients

(abiotic), humans and white birch, bald eagle (biotic)• Taiga- poor soil and snow (abiotic), fireweed and moose

(biotic)• Grasslands- rainy, dry (abiotic), whistling thorn, zebras

(biotic)• Desert- little topsoil and dry climate (abiotic), cacti,

armadillo lizard (biotic)• Tundra- permafrost layer (abiotic), cotton grass, arctic fox

(biotic)

IDENTIFY THE ENVIRONMENTAL CONDITIONS AND INTERDEPENDENCIES

AMONG ORGANISMS FOUND IN THE MAJOR BIOMES

SPI0607.2.4

• Symbiosis is a close, long-term relationship between two or more species.

• There are three types of symbiosis.• Mutualism is when both organisms benefit.• Commensalism is when one organism benefits and one remains

unharmed.• Parasitism is when one organism benefits and one organism is

harmed.