ScienceGrade 2
Why Dont Humans Lay Eggs
Why Dont Humans Lay Eggs
Learning Objective
Students will learn about why humans dont lay eggs.
Words to Know
- Mammal
- Animal with hair, makes milk, gives birth to live babies!
- Humans and dogs are mammals.
- Placenta
- Organ that sends food from mom to baby inside the body!
- Like a built-in lunchbox.
- Monotreme
- A mammal that lays eggs — platypus and echidna only!
- Platypuses are monotremes.
- Marsupial
- Mammal with tiny babies that grow in a pouch!
- Kangaroos are marsupials.
Check What You Learned
Quick Quiz
1 / 3What does “Mammal” mean?
Lesson Info
Grade 2
2026-07-20
Standards Alignment
- 3-LS4-2
Use evidence to construct an explanation for how the variations in characteristics among individuals of the same species may provide advantages in surviving
- 3-LS4-3
Construct an argument with evidence that in a particular habitat some organisms can survive well, some survive less well, and some cannot survive at all
Keywords
2nd grade sciencescience for kidsdonthumanslayeggsmammalplacentamonotrememarsupial3-LS4-23-LS4-3
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