your neighbor uses straw. now, using that information try to create an educated guess about what hay and straw are.
write it down in your science journal. even if the answer is different from your guess you can still learn things from your guess.
straw is the stalk of the wheat. the combine can cut the wheat close to the ground, sucking in lots of stalk, separating it from the grain, and spitting in out in rows behind the combine. then the stalks can be gathered up and pressed tight into bales by a machine like the one in the picture above. this machine wraps a plastic rope around the bales, holding 