To solve this problem, we need to interpret the
topographical map and determine the
elevation range for each labeled point (A through F) based on the
contour lines surrounding them.
---
🔍 Key Concepts:
-
Contour lines connect points of equal elevation.
- The
contour interval is the difference in elevation between adjacent contour lines. In this map, we can see labeled lines: 50, 100, 150, 200, 250, 300, 350 → so the
contour interval is 50 units (likely feet or meters).
- If a point lies
between two contour lines, its elevation is
greater than the lower line and
less than the higher line.
- If a point lies
on a contour line, its elevation is
exactly that value.
---
📍 Location A:
- Lies
between the 300 and 350 contour lines.
- So, elevation is
between 300 and 350.
✔ Answer: between 300 and 350
---
📍 Location B:
- Lies
outside the 250 contour line, and there’s no higher contour line shown around it — but we can infer from nearby lines.
- Looking at the map: to the left of B is a 250 contour line; below it is no line, but the next lower line is 200 (visible near center). However, B is clearly
not inside any enclosed contour, and lies
between 200 and 250.
- Confirming: moving from 250 down to 200, B is in that valley-like area.
✔ Answer: between 200 and 250
*(Note: Some might argue it’s below 200 — but since no contour below 200 is shown near B, and the terrain slopes gently, the safest assumption is between 200 and 250.)*
---
📍 Location C:
- Lies
between the 150 and 200 contour lines.
- The 150 line curves around it from the right, and the 200 line is above it to the left.
✔ Answer: between 150 and 200
---
📍 Location D:
- Lies
between the 200 and 250 contour lines.
- You can see the 200 line curving around it from the left, and the 250 line above it.
✔ Answer: between 200 and 250
---
📍 Location E:
- Lies
on the 300 contour line? Wait — actually, looking closely, E is
just outside the 300 line, but
inside the 350 line.
- The 350 line encloses an area, and E is inside that loop but not on the 350 line — it’s
between 300 and 350.
✔ Answer: between 300 and 350
---
📍 Location F:
- Lies
between the 200 and 250 contour lines.
- The 200 line is below it, and the 250 line is above it.
✔ Answer: between 200 and 250
---
##
✔ Final Answers:
-
Location A: between
300 and
350
-
Location B: between
200 and
250
-
Location C: between
150 and
200
-
Location D: between
200 and
250
-
Location E: between
300 and
350
-
Location F: between
200 and
250
---
## 💡 Tip for Students:
Always look for the
two nearest contour lines surrounding the point. The elevation must lie
strictly between those two values unless the point is directly on a line (in which case it equals that value). Since none of these points lie exactly *on* a labeled contour line (except possibly E — but even E is just inside the 350 loop), we use “between X and Y”.
Let me know if you’d like a visual explanation or diagram!
Parent Tip: Review the logic above to help your child master the concept of topographic worksheet.
