Iguanas

Iguanas, being cold-blooded reptiles, rely on the sun to absorb heat and stay alive. Their black bodies are ideal for absorbing heat. The sun's energy, in the form of infrared radiation, warms the iguanas, causing them to change color from purple to gold as they heat up. They store this heat to dive into cold water for food, where they cool down by transferring heat to the ocean. Upon returning to land, they rewarm by spreading out on sun-baked rocks, absorbing heat through conduction, allowing them to store enough energy for their next dive.

Why do iguanas need to sunbathe?

• To change their body color

• To absorb heat from the sun

• To produce their own heat energy

• To cool down their bodies

What color do iguanas turn when they are warm?

• Black

• Green

• Gold

• Purple

Why do iguanas need to store heat energy?

• To fly

• To dive into cold water

• To change their skin texture

• To camouflage

How do iguanas lose heat in the ocean?

• By evaporation

• By conduction and convection

• By reflection

• By radiation

What helps iguanas regain heat on land?

• The sun-baked rocks

• The cold ocean

• The wind

• The seaweed