Life Science: 4th grade review

What is an adaptation?

• A feature or behavior that helps an animal survive.
• The food that an animal eats.
• How energy moves in a food web.
• How animals evolve throughout time.

Amphibian means _____.

• Land water
• Double life
• Land mammal
• Aquatic mammal 

I breathe with lungs, lay eggs, am ectothermic (cold-blooded), and often have scaly skin which holds in the water.  What am I?  

• fish
• mammals 
• birds
• reptile 

I live part of my life in water and part on land.  I am born with gills but grow lungs.  I am ectothermic (cold-blooded).  I have moist smooth skin.  What am I? 

• fish
• bird
• amphibian 
• mammal

The only group of animals that begin their lives breathing through gills in the water and as adults can live on land breathing with lungs.

• amphibians
• arthropods
• mammals
• fish

I have dry and rough skin, lay eggs, breathe with lungs, and am ectothermic (cold-blooded). What am I?

• Fish
• Mammals
• Amphibians
• Reptiles

Turtles, lizards, snakes and crocodiles are all examples of what class?

• Amphibians
• Reptiles
• Birds
• Mammals

Which class has organisms with dry, scaly skin?

• Amphibians
• Reptiles
• Birds
• Mammals

How do reptiles exchange oxygen and carbon dioxide?

• lungs
• gills
• through their skin
• they don't need to exchange gases

How many pairs of legs do arachnids include?

• 4
• 3
• 5
• 2