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Change Clues at the Rainforest Guesthouse

Read a rainforest guesthouse test graph and use evidence to compare heating and cooling changes in wax and pancake batter.

Grade 2ScienceInteractive · Printable

Aligned to2-PS1-4

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What’s included

Single worksheet
Auto-graded online
1 NGSS standard
Printable answer key
13 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 2
Subject: Science
Question types: Fill in the blank, Multiple choice, Matching, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

Students compare observations before heating, after heating, and after cooling.
Students use evidence to explain which heating and cooling changes can and cannot be undone.

How to use

Read the test notes and graph together. Students answer using the recorded evidence; no hands-on heating is needed.

Curriculum

NGSS standard covered

2-PS1-4

Use evidence to explain that heating or cooling causes changes, some that can be undone and some that cannot.

Preview

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Name Date

Change Clues at the Rainforest Guesthouse

Use test records to decide which changes can be undone.

Read the Guesthouse Records

Read the notes and graph. A sample is one small amount of a material.

A Demonstration Above the Forest

At a rainforest canopy guesthouse, visitors watched Ms. Ellis test candle wax and pancake batter. She used six small samples of each material. The wax started as solid pieces. The raw batter was thick but could flow when its tray was gently tilted.

Ms. Ellis used electric equipment to heat the wax until it melted and to cook the batter into small pancakes. She kept the sample sizes the same within each group. She checked the same samples at the start, after heating, and after they cooled to room temperature. Nothing was added or taken away.

At each step, she gently tilted the trays and counted how many samples flowed. After cooling, the wax was solid. The pancakes stayed firm and cooked; they did not become raw batter again. The graph shows the counts.

Ms. Ellis handled the heating equipment, hot materials, and trays. The visitors watched from a safe distance. They used the records to compare changes in the materials, not changes in their shapes.