astronomy

Planet in Peril

Planet in Peril is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Planet in Peril rather than just read about it. In short: Planet in Peril is a two-part, four-hour documentary on CNN that premiered on October 23, 2007, broadcast in the CNN Presents format. It also aired as a special presentation on December 2 and 3, 2007 on Animal Planet & Animal Planet HD.

Key takeaways

Planet in Peril belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Planet in Peril to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Planet in Peril from memory before moving on to harder problems.

Reference excerpt

Planet in Peril is a two-part, four-hour documentary on CNN that premiered on October 23, 2007, broadcast in the CNN Presents format. It also aired as a special presentation on December 2 and 3, 2007 on Animal Planet & Animal Planet HD. CNN's Anderson Cooper, Sanjay Gupta and Animal Planet's Jeff Corwin investigate the current state of our planet, focusing on four major areas: global warming, overpopulation, deforestation and species loss. They report from a wide variety of locations including Alaska, Brazil, Madagascar, Southeast Asia, and Yellowstone National Park, examining the effects of population growth, rising temperatures, poaching and illegal wildlife trade, among others, on the global environment. Specific areas it deals with are the conflict in the Niger Delta (oil exploitation) and La Oroya, Peru (industrial pollution). On December 11, 2008, CNN premiered a sequel to Planet in Peril, called Planet in Peril: Battle Lines. It featured Anderson Cooper, Sanjay Gupta, and Lisa Ling from National Geographic Explorer.

References

External links Planet in Peril Interview with Sanjay Gupta, Jeff Corwin and Anderson Cooper on Planet in Peril

Worked examples

Example 1 — a first encounter with Planet in Peril

Start with the simplest possible case. Write down what Planet in Peril claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Planet in Peril before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Planet in Peril ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Planet in Peril

In research: Planet in Peril appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Planet in Peril in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Planet in Peril is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2007 English-language films, 2007 documentary films, American documentary television films, so understanding it makes those chapters shorter.
In everyday life: Look for Planet in Peril outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Planet in Peril in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Planet in Peril means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Planet in Peril out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Planet in Peril in simple terms?

Why does Planet in Peril matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Planet in Peril?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Planet in Peril.