Trophic Levels A trophic level is the position
- Slides: 14
Trophic Levels • A trophic level is the position that an organism occupies in a food chain Consumer Secondary Consumer, Carnivore Consumer Primary Consumer, Herbivore Produce r
Energy Pyramid • Energy pyramid is a way of describing the feeding and energy relationships within a food chain or web.
Energy Pyramid • The Energy Pyramid helps us determine how much energy is passed to the next organism • When one organism consumes another, it transfers energy to the new organism • However not all organisms provide the same amount of energy
It Start’s With the Sun Phot osyn thes is!!
Energy Level Changes y on n Population Changes S
Guided Practice 1. Write down each food chain within the web (5 total) 2. Create an energy pyramid with the organisms 3. Label the trophic levels of the energy pyramid
Copy down the question and write the correct answer on your paper. Power Up 1. Organisms that share a trophic level are a) b) c) d) Elephants and lions Cheetahs and giraffes Chipmunks and squirrels Wolves and sparrows 2. Which animal below is only a primary consumer? a) b) c) d) Fox Grass Horse Wolf
Energy Pyramid n ula tio op n. P ei as y erg en cre in De ase cre De • Much of the energy is “lost” when one organism in a food chain eats another • Most of the energy is converted into heat energy • Each feeding level represents about a 10% energy loss
Food Chains and Energy Pyramids Lab • Energy is measured in Joules
Copy down the question and write the correct answer on your paper. Power Up 1. In what way do the organisms of the upper trophic levels have less energy than the organisms of the lower trophic levels? a) Their food energy is less b) Their food energy is less concentrated c) Their bodies have less energy d) Their bodies have less concentrated energy
Reviewing Food Webs • Choice 1 – students will write a story about going through and experiencing a food chain • Choice 2 – Students will draw a cartoon of animals in the food web
Copy down the question and write the correct answer on your paper. Power Up 1. Why is the sunlight important to ecosystems? a) Sunlight provides light necessary for living things to see b) Sunlight provides all energy needed by living things c) Sunlight is the only source of heat needed by living things d) Sunlight provides the energy needed for producers to make food