Tractors. Snapshot Picture Library

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      TR ACTORS

      Tractors are big, tough vehicles.

       Their main job is to pull heavy

       things. While they are not very

       fast, they are very powerful.

       They can drive on rugged

       ground and slippery slopes.

      Tractors are perfect for working

       on farms. They pull machines

       that plow fields and sow seeds,

       work that horses used to do.

       But tractors also have other

       uses. You can find them on the

       beach pulling boats or in the

       mountains clearing snow.

      Tractors are

       rugged, with

       large wheels

       and powerful

       engines.

      Most tractors

       have big wheels

       at the back and

       smaller ones

       at the front.

      Four-wheel

       drive tractors

       have bumpy

       front tires.

      It’s easy to spot

       a two-wheel

       drive tractor.

       The front

       tires are much

       smoother.

      A tractor’s

       engine is at the

       front. It has an

       exhaust pipe

       that sticks up

       in the air.