Prove it! Water evaporates.

Prove it! Small grains of sugar dissolve quicker than large grains.

Prove it! Oil is lighter than water.

Prove it! You are alive!

Prove it! Only iron is magnetic.

Prove it! Metal is a conductor.

Prove it! Plants need light to grow.

Prove it! Woodlice prefer dark places.

Prove it! Chalk is softer than granite.

Prove it! The greater the power, the brighter the bulb.

Prove it! Melting is a reversible change.

Prove it! Friction slows things down.

Prove it! Micro-organisms are living things.

Prove it! Light only travels in straight lines.

Prove it! The moon is not a light source.

Prove it! Oxygen is a gas.

Prove it! The thicker the insulation, the more muffled the sound.

Prove it! The thicker the string, the lower the sound.

Prove it! When you exercise, your body needs more oxygen.

Prove it! Polystyrene is a better insulator than plastic.

Prove it! Warmth speeds up dissolving and evaporation.

Prove it! A badger is a mammal.

Prove it! Foil is made of metal.

Prove it! The closer the light source, the larger the shadow.

Prove it! Plants don’t need soil to live.

Prove it! Sweets rot your teeth.

Prove it! Woodlice prefer dark places.

Prove it! You need light to see.

Prove it! Plants reproduce.

Prove it! Without sunlight, there would be no life on Earth.