What students investigate

Students start with the idea that warming and cooling can change what we see, and that three observations (before, after warming, after cooling) help check a change. They watch ice melt and water freeze, melted butter firm up again, and chocolate harden in a new shape.

Then come changes that do not go back: a cooked egg stays cooked, a baked cookie never becomes dough again, and a hard frost can damage a basil leaf. The last cards ask students to look after cooling before they decide, and to back a claim with evidence about the change.

Who it is for

Heating & Cooling is written for Grade 2 physical science. It fits well beside a cooking or ice-melting activity, because students can match the before, warmed and cooled stages on the cards to what they see.

The words reversible and irreversible are taught with a concrete food example before any question uses them.

What students learn

10 learning ideas, one at a time. Each one is a silent animated Learn card, then Review and Mastery questions.

1. Warming and cooling can change what we see.
2. Three observations help us check a change.
3. Ice melts into water, and water can freeze again.
4. Melted butter can become firm again when cooled.
5. Chocolate can harden again in a new shape.
6. Cooling a cooked egg cannot make it raw.
7. Cooling cannot turn a baked cookie into raw dough.
8. A hard frost can damage a basil leaf.
9. We must look after cooling before we decide.
10. A good answer uses evidence about change.

Science words in this pack

Each word is taught on its Learn card, then used again in Review and Mastery.

• warm
• cool
• observation
• evidence
• solid
• liquid
• melt
• freeze
• firm
• reversible
• irreversible
• bake
• texture
• frost
• thaw
• claim
• argument

Inside the pack

How it works in class

• Learn. 10 silent whiteboard animations, one idea per card. No audio, so it works on a classroom screen or a quiet device.
• Review. 30 practice questions with feedback. Ideas a student misses come back.
• Mastery. 30 questions to show what each student knows on their own.
• Certificate. A student who finishes can print a certificate or save it as a PDF. It shows first-try Review and Mastery results and the ideas that needed a retry.

Standards connections

These cards support parts of the following NGSS performance expectations. They do not replace hands-on investigations.

• 2-PS1-4 — core ideas

More in Science in Motion — Grade 2

• Materials Detectives: Observe, Test & Sort Look closely. Test properties. Sort what you find.
• Choosing Materials Pick the best material for a job by testing its properties.
• Build With Pieces See how a set of small pieces can be built into many new objects.
• Compare Habitats Compare the plants and animals that live in different places.
• Shaping the Land Explore hills, valleys and rivers, and how wind and water change land.
• What Plants Need Test what plants need to grow: light and water.
• Pollinators & Seeds See how animals move pollen and help seeds travel.
• Maps Around Us Use simple maps to show the shapes of land and water.
• Finding Water Find where water is on Earth, as solid ice or liquid water.
• The Water Cycle Follow water as it moves between sky, land, and water.

About the Science in Motion — Grade 2 series