Answer:
13. is Option J) all of the above
and 14 I'm not completely sure but I think its option D.
Answer:
A
Explanation:
photosynthesis converts light energy to chemical energy and not the other way round
product of photosynthesis is oxygen and energy
photosynthesis cannot occur is light energy is not available
Answer:
Streak test is used to compare the properties of different minerals.
Explanation:
Streak test is perform on rocks to check the properties of a mineral or rocks. If you have a piece of white floor tile, You can use it for the test. In this test we rub mineral on a piece of white tile Turn your tile so that the dull side faces up. Take your rocks one at a time and rub them back and forth over the surface of the tile and observe the color of the powder left behind which will tell about the type of mineral.
prevents backflow into the left atrium
