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Whale Blubber: Function and Adaptation — Reading Comprehension

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This engaging, audio-integrated reading passage, 'Whale Blubber Function and Adaptation,' introduces young learners to the incredible role blubber plays in a whale's survival. Aligned with NGSS Standard LS1.A: Structure and Function, students will discover how this thick layer of fat helps whales stay warm in freezing ocean waters, store energy, and even aids in buoyancy. The passage uses simple language and defines key terms, making it accessible for a Grade 5 reading level. Activities include comprehension questions, a glossary, and short answer questions to reinforce understanding of this vital animal adaptation. Keywords: whale blubber, blubber function, whale adaptation, marine biology, animal insulation, energy storage, cold water survival.

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Whale Blubber: Function and Adaptation

Whale blubber is a thick, dense layer of fat found just under the skin of whales. In some large whales, this blubber can be over a foot thick! It covers most of their bodies and is much more than just fat – it is a special adaptation that helps whales live in the coldest oceans on Earth.

One main job of blubber is insulation. Blubber acts like a built-in wetsuit, keeping a whale’s body heat inside and the freezing water out. This is important because water takes away heat 25 times faster than air. Without blubber, whales would lose heat quickly and could not survive in icy oceans.

Blubber also works as an energy storage. When whales travel long distances or fast, they may not eat for weeks. During this time, they “live off” their blubber. The fat inside provides the energy they need until they find food again.

Another important job of blubber is buoyancy. Blubber is lighter than water, so it helps whales float. It also gives whales a smooth, round shape which helps them swim faster and more easily. This is called streamlining.

Blubber is more than just fat. It has blood vessels that can open or close. When a whale needs to stay warm, the blood vessels close to keep heat inside. When it gets too hot, the vessels open to let heat out.

Different whales have different amounts of blubber. Bowhead whales have blubber up to 20 inches thick to survive in Arctic waters. A blue whale’s blubber can weigh as much as a car! Baby whales, called calves, get their blubber quickly by drinking their mother’s milk, which is about 50% fat – the richest milk of any mammal.

Blubber is a special adaptation for whales. Whales are warm-blooded mammals, which means their bodies make their own heat. Blubber helps them keep that heat so they can live in cold, deep oceans.

Interesting Fact: Some whales can swim for thousands of miles during migration using energy stored in their blubber!

What is blubber?

A thick layer of fatA type of whale foodA whale boneA kind of fish

What does insulation do?

Keeps heat insideHelps whales eatMakes whales heavierCleans whale skin

How do baby whales build blubber?

Drinking mother's milkEating fishSwimming fastSleeping a lot

Why is blubber important for energy?

Stores energy for laterMakes whales hungryHelps whales breatheKeeps water out

Blubber helps whales float. Why?

It is lighter than waterIt is heavyIt is stickyIt is hard

What might happen if a whale had no blubber?