Grades 3–6 · challenge for 7–12 · Website scavenger hunt
Why Our Valley Floods — Web Search
For teachers: Single-page hunt on the flooding page. Core 3–6; challenge covers the Office of the Chehalis Basin’s twin goal and the dam trade-off (a nice civics tie-in). Check the questions you want, then print — unchecked ones are left off and the rest renumber automatically. Expand the answer key below to print a teacher copy. Open the source page →
10 of 10 selected
Open “What’s in our backyard → Why the Valley Floods” (or search “flooding”). Read the story, the flood timeline, and the “what do you do” section, then answer each question.
NameDate
Challenge · Grades 7–12
Answer key (for teachers) — matches your selected questions
1.About 14 feet.
2.Geography.
3.An atmospheric river.
4.A floodplain.
5.The high tide pushes back against the river (like a hand on a hose), so the water has nowhere to go but up and out.
6.1996 and 2009.
7.The Office of the Chehalis Basin.
8.The same stretch of I-5 flooded again just two years after 2007 — proof this isn’t a once-in-a-lifetime problem.
9.Cut flood damage and bring back salmon habitat — they fit because the side-channels and log-jams that help fish also slow the water down.
10.A dam that protects towns from floods can also block fish, so people are still debating it; the page frames that disagreement as civics happening in our own valley, not a failure.