Knaph

Ways of getting around

People travel by land, water and air; vehicles have changed from carts to cars, and some keep the air cleaner than others.

Depth 1 · Foundation

You can sort vehicles into land, water and air, and say which keep the air clean.

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Depths of understanding

  1. 1

    Foundation

    You can sort vehicles into land, water and air, and say which keep the air clean.