science

Ice jigger

Ice jigger is a science 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 Ice jigger rather than just read about it. In short: The ice jigger also known as prairie ice jigger, or prairie jigger, is a device for setting a fishing net under the ice between two ice holes, invented by indigenous fishermen of Canada in the early 1900s. The jigger consists of a slotted wooded board that floats under the ice surface and two levers connected in such a way that when a rope connected to one lever (arm) is pulled, the second lever (leg) jabs into the…

Key takeaways

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

Reference excerpt

The ice jigger also known as prairie ice jigger, or prairie jigger, is a device for setting a fishing net under the ice between two ice holes, invented by indigenous fishermen of Canada in the early 1900s. The jigger consists of a slotted wooded board that floats under the ice surface and two levers connected in such a way that when a rope connected to one lever (arm) is pulled, the second lever (leg) jabs into the ice and pushes against the ice to move the board in the direction opposite to the rope pull. After each pull a spring resets the arm, and the action is repeated. In this way a person by an ice hole propels the jigger away. If the ice is transparent enough, one just makes another hole over the jigger when it moves far away. (Otherwise the progress of the jigger may be monitored by the tapping noise of the jigger's leg.) After that the jigger is pulled out of the second hole, together with the rope, and the net may be stretched under the ice using the rope from one hole to another. The simple and effective design remained basically unchanged since its invention. Imler (1971) described the use of a radio transmitter to locate the jigger under heavy ice cover by Colorado fishery biologists.

References

External links How ice jiggers work Video

Illustrations

Worked examples

Example 1 — a first encounter with Ice jigger

Start with the simplest possible case. Write down what Ice jigger claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Ice jigger 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 Ice jigger 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 Ice jigger

In research: Ice jigger appears in science 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 Ice jigger 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: Ice jigger is common in secondary-school and first-year university syllabi. It links to neighbouring topics Canadian inventions, Fishing equipment, so understanding it makes those chapters shorter.
In everyday life: Look for Ice jigger 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 Ice jigger in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ice jigger 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 Ice jigger out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ice jigger in simple terms?

Why does Ice jigger matter?

Because it connects several science 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 Ice jigger?

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 Ice jigger.