amphibians and reptiles chapter 18 section 2 6 th grade chapter 18 section 2 6 th grade

Amphibians and Reptiles

Chapter 18 Section 2

6th Grade

Do Now…

If fish were to live on land, what adaptations would they need to survive?

Do Now…

Complete another mealworm observation. Work on lab questions and draw a picture if possible.

Objectives

Students will…Describe how amphibians have adapted to live in water

and on landIdentify the adaptations that allow reptiles to live on land

Amphibians

Definition: animals that spend part of their lives in water and part on land

Origin of the word “amphibian”- from the Greek word amphibious which means “double life”

Examples: Frogs, Toads, Salamanders

Amphibian Adaptations (ectotherms)

HibernationCold climatesPeriod of inactivityBury themselves in

mud or leaves

Estivation Hot, dry climatesPeriod of inactivityBurrow underground

Amphibian Characteristics

Have endoskeletonsYoung have gills, adults have lungsHave 3 chambered heartsAdults exchange oxygen and carbon dioxide

through skinHave ear drums

Reptiles---Unique Characteristics pg. 538

TurtlesCrocodiles and

Alligators

Lizards Snakes

Reptiles

Reptile Adaptations pg. 539

Characteristic Purpose

Skin

Neck

Lungs

Internal Fertilization

Amniotic eggs

Videos

Reptiles and Amphibians part 1Reptiles and Amphibians part 2Reptiles and Amphibians part 3Reptiles and Amphibians part 4

For Next Time…

Read pgs. 535-539

Frog Metamorphosis and Reptiles and Amphibian Review

Chapter 18 Section 2

6th Grade

Do Now…

What is the difference between hibernation and estivation?

Objectives

Students will

Create a foldable to learn model the metamorphosis of an amphibian

Amphibian Metamorphosis (Frogs)

Create a foldable according to teacher instructions1) Eggs- are laid by adult amphibian in the water2) Young Larva-are dependent on water. They have no legs

and breathe through gills.3)Older Larva- body structures are developed that are

necessary for life on land including legs and lungs. 4) Adult- have lungs, legs, breathe through skin and can

reproduce. They require water for external reproduction.

Practice Worksheet

With your lab group—complete Reinforcement worksheet on Amphibians and Reptiles

For Next Time…

Read pgs. 541-544Define contour feather and down

feather on index cards.