Shark survival

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SCIENCE | MIDDLE SCHOOL

Shark Embryos Fight for Survival

As plants and animals reproduce over time, they are able to change and adapt to ensure or improve their chances of survival. The evolutionary goal of reproduction is paired with the concept of natural selection and survival of the fittest to determine who will reproduce. From colorful plumage to size, different species use different strategies to ensure reproduction and mate selection. The sand tiger shark has a unique strategy to ensure successful reproduction - and it depends on the timing of mating. Listen to learn more about the ultimate sibling rivalry while in the womb.

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Story Length: 3:46

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Listening Comprehension Questions

  • In what ways did Andrew Carnegie’s libraries serve their communities?
  • How did Carnegie benefit from a library when he was growing up?
  • Which personality traits helped propel Carnegie from poverty to riches? Bring specific details from the story to support your ideas.
  • According to Carnegie, what should rich people do with their money and why? Why was Carnegie known as both generous and “brutal”?

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  • In your opinion, what should really rich people do with their fortunes?
  • What does it take for a person to rise from “rags to riches”?

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