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Give a fact a because from what you know, check it against the source, and tell elaboration from highlighting and rereading.
Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.
You will ask why a fact would be true, answer it from what you know, check the answer against the source, and tell which facts have no why to find.
In lesson 2 you wrote why questions onto a question list, to answer later from memory. This lesson does something at the moment of study: you meet a fact, ask why it would be true, and answer straight away from what you already know. It is how a list of separate facts starts to become an explanation you can rebuild.
| Term | What it means |
|---|---|
| Elaboration | Connecting a new fact to what you already know: a reason, an example, a contrast. |
| Elaborative interrogation | Asking why would this be true? of a fact and answering it yourself. |
| Because-answer | Your answer to a why question, written as one sentence with because in it. |
| Check against the source | Comparing your because-answer with the textbook or notes, and correcting it if it is wrong. |
| Arbitrary fact | A fact with no reason behind it to find, such as a name or a date. |
A fact on its own is easy to lose. Arctic foxes have short ears and legs is one more line in the notes. Ask why it would be true and answer from what you know — because less body sticking out into the cold means less heat lost — and the fact now hangs on something you already had. That is elaborative interrogation.
The move has four parts. Ask why this would be true, or what would happen if it were not. Answer in one sentence with because, from what you already know, before looking anything up. Check the answer against the source: a because that sounds right can be wrong, and a wrong one can stick. Link it to one more thing — an example or a contrast. The fennec fox of the Sahara has huge ears, and the same reason explains both foxes.
Not every fact has a why. The name of Saturn's largest moon is Titan; there is no reason to find. Names, dates and vocabulary are kept by retrieval and spacing, not by elaboration.
Another way: picture
Think of hooks on a wall. A new fact with nothing to hang on falls off. A because-answer screws a hook into something already fixed there.
Another way: steps
Dunlosky and colleagues (2013) reviewed elaborative interrogation and rated it as moderate utility. In many studies, learners who answered why questions about facts remembered more of them than learners who read the same facts, sometimes with an explanation supplied. Two limits matter. It works better when you already know something about the topic, because the answer has to come from somewhere. And most of the studies used short factual statements, so there is less evidence for long, complex texts.
The IES practice guide (Pashler and colleagues, 2007) makes a related recommendation: help learners build explanations by asking and answering deep questions — why, how, what if, how does this compare.
Highlighting feels like working on meaning. It marks that a sentence looked important and connects it to nothing. Dunlosky and colleagues rate highlighting and rereading as low utility. Copying notes neatly is the same fact in new ink. None of them asks you to produce a reason.
This does not make a highlighter useless — it can mark where to come back to. It means the highlighting is not the studying. The why question is.
A because-answer is a guess made from what you know, and what you know may be wrong. It is warmer in summer because Earth is closer to the Sun sounds reasonable and is wrong: the seasons come from the tilt of Earth's axis. So the check is not optional. Mark each answer right or wrong against the source, and rewrite the wrong ones there and then. Finding a wrong because is not a failure — it is a misunderstanding caught before a test finds it.
In the 1930s, drought and huge dust storms struck the southern Great Plains — parts of Oklahoma, Texas, Kansas, Colorado and New Mexico — in what became known as the Dust Bowl. In response, Congress created the Soil Conservation Service in 1935.
A fictional student, Rosa, has these facts in her notes. She asks why of each. Why did the soil blow away? Because farmers had plowed up the prairie grass whose roots held the soil, and drought dried the bare ground. Why did Congress create a soil agency? Because the storms showed that farming methods, not only weather, had caused the damage. She checks both against her textbook: the first is right; the second needs one addition — the agency taught methods such as planting windbreaks and contour plowing. The date 1935 has no why. She puts it on her question list for retrieval instead.
"I highlighted the important parts, so I worked on them." Highlighting marks a sentence; it adds no reason or link.
"If my because sounds right, it is right." A sensible-sounding explanation can be wrong. Check it against the source every time.
"Every fact needs a why." Names, dates and vocabulary have no reason to find. Use retrieval and spacing for those.
"Elaborating replaces testing myself." Elaboration helps a fact make sense; you still need retrieval and spacing to keep it.
Ask why the fact would be true.
Fact: Arctic foxes have short ears and legs. → Why would that help in the Arctic?
The question makes you look for a reason instead of rereading.
Answer from what you already know.
Because less body sticks out into the cold, so less heat is lost.
The answer uses something known about heat and surface.
Check it against the source.
Textbook: small extremities reduce heat loss ✓
Only a checked because is kept.
Link it to a contrast.
Fennec fox (Sahara): very large ears → sheds heat
The same reason explains the opposite shape in the opposite climate.
Ask why the storms happened.
Fact: Dust storms swept the Great Plains in the 1930s. → Why then, and why there?
Two whys: the timing and the place.
Answer from memory.
Because there was a drought.
A first answer, from what the student knows.
Check it and find what is missing.
Textbook: drought and the prairie grass had been plowed up → answer incomplete ✗
Drought alone does not explain why the soil blew away; the bare ground does.
Rewrite the because.
Because drought dried soil that plowing had left bare, with no grass roots to hold it.
The corrected answer is the one that goes in the notes.
Ask why pipes can burst.
Fact: Water pipes can burst in a hard freeze. → Why?
A fact with a cause behind it is worth a why.
Answer from what you know.
Because water expands when it freezes, and the pipe cannot stretch.
The answer links to the fact that ice floats: it takes up more room.
Check it against the source.
A fictional student's biology notes say: *Arctic foxes have short ears, a short muzzle and short legs.* Which move is elaborative interrogation?
The fact: *every fourth year is a leap year, with a February 29.* A fictional student asks why, and answers from what she knows: Earth takes about 365¼ days to go around the Sun. Complete her worked answer for 44 years.
Say what happens each year without leap days.
Each 365-day year ends about ¼ day before Earth is back where it started.
This is the because: the calendar year is shorter than the orbit.
Add up the shortfall over 44 years.
44 × ¼ = a days behind
The quarter days pile up, so the seasons would drift through the calendar.
Count the leap days that make it up.
One every fourth year: b leap days in 44 years
One extra day every fourth year cancels four quarter days, which is why the rule is every fourth year.
Five moves a fictional student makes with the fact *Ice floats on water.* For each, does it elaborate: **yes** or **no**?
| Elaborates? | |
|---|---|
| Why? Because ice is less dense than water | |
| Underlining *floats* twice | |
| What would happen to lakes if ice sank? | |
| Rewriting the sentence neatly | |
| Comparing it with solids that sink |
A fictional student answered four why questions from memory and now checks them against her science textbook. Mark each answer **right** or **wrong: check the source**.
| Verdict | |
|---|---|
| Lightning before thunder: light is faster than sound | |
| Summer: Earth is closer to the Sun | |
| Metal feels colder: it conducts heat away faster | |
| Moon phases: Earth's shadow covers part of it |
A fictional page of earth-science notes holds 17 facts. 4 of them are names or dates with no reason behind them. The student asks why of every other fact and answers from memory. Checking against the textbook, 4 answers turn out wrong. How many why questions did she answer, and how many answers were right?
Why questions answered: a
Answers that were right: b
Three facts from a fictional student's US history notes. For each, she asks *why?* Choose the because that answers it.
| Because | |
|---|---|
| Dust storms on the Great Plains, 1930s | |
| New York City the busiest port after 1825 | |
| The 19th Amendment ratified in 1920 |
Lesson test: one question per skill, one attempt each, no hints. Your answers are checked when you submit.
Four facts from a fictional student's science notes. For each, decide whether a why question is worth asking, and choose its because.
| Worth a why? | Because | |
|---|---|---|
| Fennec foxes have very large ears | ||
| Salt is spread on icy roads | ||
| Coastal cities have milder winters | ||
| Saturn's largest moon is called Titan |
You can elaborate a fact and check your because. Take three facts from your own notes, write a because for each without looking, then check them. Next: explaining a worked example to yourself. You can stop in the middle of any of this. Closing the page is the whole of stopping — your place and anything you had typed are already saved, and the lesson opens again where you left it.
12. Your turn: water pipes in winter, step 3
Textbook: water expands by about 9 percent as it freezes ✓
The because is kept, and the link to floating ice makes two facts support each other.