5/28 & 5/29 - 7th Grade Agenda

Learning Objective: Learn about MammalsCollect HW: Reading & Notetaking p.238 – 239Chap 12 TestVideo: Nova - MultiverseReading & Notetaking p. 486 - 489Classwork: Reading & Notetaking p.241 - 242Reminder: Last day to turn in late work is 5/29

Reflection

• Prompt: Write 3 facts that you know about mammals.

Characteristics of Mammals

• endothermic vertebrates • four-chambered heart • skin covered with fur or

hair. • Most mammals are born

alive• young mammal is fed

with milk

Do Dolphins have hair?

• Yes. Near their blow holes

• Most of the hair disappear when they get older

What are the function of hair and fur?

• Fur and hair prevent body heat from escaping

• Helps maintain a stable body temperature in cold weather

• Animals in cold regions have thicker coats of fur

When did the first mammals appear?

• About 270 Million years ago

• They were small mouse like animals

• After the dinosaurs disappeared about 65 million years ago, larger mammals evolved

You can tell the type of food mammals eat by its skull & teeth.• What type of food

does this animal eat?

You can tell the type of food mammals eat by its skull & teeth.• What type of food

does this animal eat?

Do some mammals lay eggs?

• Yes.• Monotremes lay eggs:• Two types of

Monotremes are: Spiny Anteaters & Duck billed platypus

What are Marsupials?

• Marsupials are mammals

• The young are born alive

• But at an early stage of development, they develop in a pouch on their mother’s body

Baby Kangaroo in mother’s pouch

What are Placental Mammals?

• Placental mammal develops inside its mother’s body

Diversity of mammals

• Most of the mammal species are bats and rodents