5/12 & 5/13 - 7th Grade Agenda Learning Objective: Learn about Amphibians Collect HW: Reading & Notetaking 222 – 223 Chap 11 Test Video: Frog Dissection Video: BBC Life (Fish) Textbook Reading 463 – 467 HW: Reading & Notetaking 225 – 226

Reflection Prompt: Write 3 facts that you know about frogs

How do Fish obtain Oxygen? Fish obtain oxygen in the water through its gills

Do Fish break down H2O into Hydrogen and Oxygen? Fish do not break H2O into hydrogen and oxygen. There is oxygen gas dissolved in the water. Their gills extract this oxygen gas out of the water and return CO2 just as our lungs do. What would happen to the fish if there was no oxygen in the water?

Most fishes have external fertilization In external fertilization, the eggs are fertilized outside the female’s body. The male hovers close to the female and spreads a cloud of sperm cells over the eggs she releases There are exceptions – Guppies, Mollies (Live birth)

Amphibians evolved from Fish Mudskipper Fish (Type of Goby Fish) It can live out of water for long periods It can breath through its skin just like Amphibians

What are Amphibians? The word amphibian means “double life” After beginning their lives in water Most amphibians spend their adulthood on land Returning to water to reproduce.

Life cycle of an Amphibian

Do tadpoles have lungs or gills?

Do frogs have lungs or gills?