A collection of logs tied together for floating on water is called a

Early man rode on horses and also used them to carry 

The early man built _________ with stones, animal skins and branches of trees

Early man fitted ______ pieces of tree trunks to his carts and it moved smoothly on uneven ground.

The early man noticed that __________ that fell on the ground grew into new plants.

The early man made a cart without wheels called

Early man used stones and _________ to make the soil soft.

Early man melted some harder stones and got