One Question at a Time

■ Science 10 · Term 1 · Week 2

Name: Section: Date:

Teacher: For a learner who did not get there with <code>worksheet.html</code>. This is not a shorter version — it is built on one habit: asking two questions of a boundary, in order, before naming anything. Four tasks, big boxes, and a worked example above each.

1 Which way? — apart, toward, or past — three words, nothing else yet

Worked example: "Two plates are pulling away from each other." → apart. Do not name the boundary yet. Just say which of the three.

What is happening	Apart, toward, or past?
The plates are grinding alongside each other.
One plate is being pushed under another.
A gap is opening and filling with lava.

2 Now the name — each of the three words has exactly one name

Worked example: apart → divergent · toward → convergent · past → transform. Three words, three names. Learn them as a pair and the first half of every question is answered.

Which way	The name
Apart
Toward
Past

3 What crust? — only ask this one for convergent boundaries

Worked example: Ocean is thin and dense — it sinks. Continent is thick and light — it does not. So the answer to what forms depends entirely on what is arriving.

What is arriving	Does anything sink?	Is there a trench?
Ocean and continent
Ocean and ocean
Continent and continent

Look at your third row. Nothing sinks, so there is no trench. That single row is the whole of the ★ item on the main worksheet.

4 Both questions, in order — use your answers from tasks 1 to 3

Worked example: A deep trench beside a chain of volcanic mountains on land. → Question 1: toward, so convergent. Question 2: there is a trench, so something sank, so ocean met continent.

A boundary I can name in one step

A boundary that needed both questions

This is where <code>worksheet.html</code> Section D begins. When a learner asks question 2 without being told to, the bridge is finished.

Answer key — screen only, not printed.
1 · past · toward · apart.  |  2 · divergent · convergent · transform.  |  3 · ocean sinks / yes · the older ocean plate sinks / yes · nothing sinks / no.  |  4 · varies; one step for divergent and transform, two for anything convergent. Task 3 is the one that does the work. A learner who fills that third row honestly will never again answer trench for the Himalayas.