Classroom activity Grade 2 Science

Hazel Bend's Pipe Order Puzzle: A Grade 2 Water Path Activity

A grade 2 activity where small groups race to put five cards in order, tracing how Hazel Bend's water travels from a river to a kitchen faucet.

Grade: Grade 2
Subject: Science
Material: Classroom activity
Time: 30 min
Prep: Low prep
Materials: 5 large cards per group, labeled River, Treatment Plant, Water Tower, Pipes Underground, and Kitchen Faucet, 1 small blue bead or marble per group, to represent a water drop, A stopwatch or classroom timer, 1 sealed answer-order envelope per group, for self-checking

Standards

2-ESS2-3 NGSS

Obtain information to identify where water is found on Earth and that it can be solid or liquid.

How this material aligns: Groups sequence the River, Treatment Plant, Water Tower, Pipes Underground, and Kitchen Faucet cards and confirm in the debrief that water stays a liquid at every stop, obtaining and communicating information about where Hazel Bend's water is found exactly as this standard requires.

All materials for 2-ESS2-3 →

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This material is in the public domain (CC0) and may be copied, edited, and shared freely, without attribution. Updated 2026-07-16.

Objectives

Students will sequence five stops in the correct order water travels from a river to a home faucet.
Students will describe, using a short phrase, what happens to the water at each stop in the sequence.

Vocabulary

Water tower: A water tower is a big tank raised high above town that stores drinking water. Its height is what pushes water through the pipes, keeping the pressure steady even when the power goes out.

Also: treatment plant, sequence, distribution

Teacher overview

This is a small-group card-ordering game for the whole class, in groups of four. Each group receives five large cards, River, Treatment Plant, Water Tower, Pipes Underground, and Kitchen Faucet, shuffled out of order, and races to lay them out in the order Hazel Bend's water actually travels from its natural source to a kitchen faucet. The card-ordering mechanic teaches the specific sequence and vocabulary of a real water distribution system through hands-on sequencing rather than lecture.

Activity Directions

Before class, prepare one shuffled set of five cards per group of four students: River, Treatment Plant, Water Tower, Pipes Underground, and Kitchen Faucet. Prepare one sealed answer envelope per group holding a slip with the correct order written on it.
Explain how the activity works to the class: each card names one stop on the trip Hazel Bend's water takes from a natural source to a kitchen faucet, and the fastest group to lay their five cards in the correct order wins the round.
Start the timer. Groups discuss and arrange their five cards in a row on the floor or table in what they believe is the correct order.
When a group believes its order is correct, the group raises its hands. Quietly check the order against the sealed answer envelope and note the group's time without announcing results yet.
Once every group has finished, or after a five-minute cap, reveal the correct order together as a class: River, Treatment Plant, Water Tower, Pipes Underground, Kitchen Faucet.
Groups whose order was correct move their blue bead across their own cards from River to Kitchen Faucet, saying one short phrase at each stop, such as "cleaned at the plant," "stored up high," or "travels through pipes."
Reshuffle the cards and play a second round, this time with each group racing to beat its own first-round time instead of racing other groups.
End the game after the second round and gather the class together for the debrief.

From Water for Schools (waterforschools.org). This material is in the public domain (CC0) and may be copied, edited, and shared freely.

Answer Key

Answer: River, Treatment Plant, Water Tower, Pipes Underground, Kitchen Faucet is the correct order, matching the path Hazel Bend's water takes from its natural source to a home tap.
Debrief question: "At which of the five stops is the water a liquid you could scoop with a cup?" Answer: All five stops. The river, the treatment plant, the water tower, the pipes, and the faucet all hold water as a liquid; the sequence in this game does not include a stop where the water is frozen or solid.
Debrief question: "Why does the Water Tower card come after the Treatment Plant card and before the Pipes Underground card?" Answer: The water needs to be cleaned at the treatment plant before it is safe to store, and it needs to be stored up high in the tower before it can flow downhill through the pipes to the faucet.

Differentiation

Support

Add a simple picture icon to each of the five cards in addition to the word, and allow a struggling group to peek at one stop on the answer slip in the sealed envelope as a hint after its first attempt.

Extension

Challenge groups to design and add a sixth card, Wastewater Pipe, and place it correctly after Kitchen Faucet, explaining in one sentence what happens to water once it goes down the drain.

ELL supports

Pre-teach the five stop words with picture icons and a matching gesture for each, such as cupped hands for River, a scrubbing motion for Treatment Plant, arms raised high for Water Tower, a crawling motion for Pipes Underground, and a turning motion for Kitchen Faucet, that the whole class practices together before the first round.