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
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