Unit 4.3

Changing materials (Science)

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Warm Up & Practice 🌱

No clock · No pressure

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Listen & Tap

Hear a word, tap the picture.

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Read & Tap

Read a word, tap the picture.

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Grammar Builder

Build sentences and fill the gaps.

Arcade Games ⚡

Fast & fun challenge

Star Radar Intercept space signals and tractor-beam the right probes!

Monster Munch Feed the monster off the belt.

Word Detective Sweep your flashlight through the dark museum to capture the right word!

Rocket Words Pop letters to fuel the rocket.

Word Train Operate the magnetic crane to load word chunks from the conveyor belt!

Snap & Spell Flash the camera and pop floating letter orbs in the darkroom!

Boss Battle Team up with your hero to defeat monster bosses!

📖 Target Vocabulary (7)

cool "We ___ water to make ice."
heat "We ___ soup on the stove."
melt "Ice cream will ___ in the sun."
solid "Ice is a ___."
reversible "Melting ice is a ___ change."
irreversible "Cooking an egg is an ___ change."
water droplets "I see tiny ___ on the leaf."

🧩 Grammar Focus: Changing Materials (Heating and Cooling)

Heating and Cooling Changes

Heating makes [solid] melt. | Cooling makes water freeze.

Heating makes ice melt.
Cooling makes water freeze.
Ice is a solid.
Water can change back into ice.

Reversible vs Irreversible Changes

A reversible change can change back. | An irreversible change cannot change back.

Melting ice is a reversible change.
Cooking an egg is an irreversible change.
Baking bread is an irreversible change.

Practice this grammar →