schoolscienceproject.blogspot.in
Fill a large
glass jar with fresh water and place in it several shoots of water weed.
Place the jar in
sunlight, and at once small gas bubbles will rise in the water. Invert a funnel
over the plants and over it a water-filled glass tube. The gas, which is given
off by the plants slowly, fills the tube. Plants use sunlight. With its help,
in the presence of chlorophyll, they make their building material, starch, from
water and carbon dioxide, and give off oxygen. Oxygen has actually collected in
the
glass tube. If you
remove the tube and hold a glowing splint in it, the splint will burn brightly.
No comments:
Post a Comment
schoolscienceproject.blogspot.in