1. The organic material contained in soil is known as humus.   True   False   2. The gas that is exhaled by plants is _______ (during respiration).   Oxygen   Nitrogen   Carbon Dioxide   Hint Half-n-half Clue   3. Which of the following materials/substances is not of plant origin?   Paper   Pearl   Sugar   Rubber   Linen   Half-n-half Clue   4. The _______ of carrots and turnips are eaten by man.   stems   leaves   roots   Half-n-half Clue   5. The gas that plants feed on is _______ (during photosynthesis).   Nitrogen   Oxygen   Carbon Dioxide   Half-n-half Clue   6. Wheat and other kinds of corn can be classified as cereals.   True   False   7. Which of the following is not a deciduous tree/shrub?   Sycamore   Elm   Oak   Larch   Holly   Half-n-half Clue