519 7 th Grade Agenda Learning Objective Learn

5/19 - 7 th Grade Agenda üLearning Objective: Learn about Reptiles & Birds üCollect HW: Reading & Notetaking 231 – 234 üCollect HW: Signed Grade Printout üVideo: BBC Life in Cold Blood üTextbook Reading 468 – 479 üHW: Reading Guide Chap 12 Section 3 &4

Reflection • Prompt: Write 3 questions that you have about Reptiles.

What are reptiles • Reptiles are ectothermic • Has Scales • Lays eggs on land • The ancestors of reptiles were the first vertebrates adapted to life completely out of water.

Amniotic Shell Lets the air in and out and keeps the embryo moist

Characteristics of Lizards

Can a turtle live outside it’s shell? • No! • The shell is it’s rib and backbone.

What are some characteristics of Birds? • Endothermic vertebrate • Feathers • Lay eggs • Most can fly • Four chambered heart • Scales on feet and legs

What were the ancestors of birds? • Dinosaurs • This is a picture of Archaeopteryx lived about 145 million years ago • How is archaeopteryx different from modern birds?

What adaptations allows birds to fly? • Feathers • Hollow bones (light weight) • Large chest muscles • Wing shape allows lift

Birds two typefor ofinsulation feathers. Whichhave feather is used inside are jackets anduse sleeping bags? How their different? Contour Feathers Down Feathers Give shape to a bird’s body And help them fly Traps heat and keep the bird warm

Do birds have teeth? • Birds have no teeth. • What you see are not really teeth. • It lacks the hard enamel of teeth

How birds digest • Crop: allows them to store food inside the body after swallowing it • Gizzard: squeezes and grinds the partially digest food • Gizzard contain many small stones

Parental Care • The partridge chicks find their own food from the day they hatch. • The blue jay chicks are featherless, blind, and totally dependent on their parents for food for several weeks

What are Owl Pellets? • Owls do not have teeth and swallow preys whole • Owl’s stomach digests everything except the skeleton • So the owl throws up skeleton as Owl Pellets

How does bird’s wing shape Bird’s wing shape creates lift affect flight?

Physics of Bird’s Flight • Bernoulli's Principle • Faster an air move, less pressure it exerts • The difference in pressure above and below the bird’s wing produce an upward force that causes the wing to rise