What do you think would happen over time if you put a plant BTB?
After time in the sunlight, the plant would begin photosynthesis. It would use the CO2 present in the vial and the sunlight. The BTB would turn Blue. At night the plant doesn’t have sunlight available so it would only respire or give off CO2 which would turn the BTB yellow.
What does elodea release?
oxygen
Does elodea produce oxygen?
Brazilian elodea (Egeria densa; formerly Elodea densa) and Canadian waterweed are commonly used in schools as an experimental plant for demonstrating cellular structures, such as chloroplasts and nuclei, and oxygen production during photosynthesis.
What gasses are given off by elodea?
Making oxygen The production of oxygen by photosynthesis is most easily seen in water plants such as Elodea and Cabomba.
Why are there bubbles on the leaf that was exposed to sunlight?
This process is called plant or cellular respiration.] If you look closely at your leaves that were in the sunlight, you should see lots of very tiny bubbles. These are the escaping oxygen atoms which form bubbles since they are under water.
What do bubbles indicate in the leaf?
Tiny bubbles rising from an underwater plant’s leaves are oxygen. In a process called photosynthesis, plants use light energy to make food and oxygen from carbon dioxide and water. Though plants do use a small amount of this oxygen, most is released as waste.
Why is the leaf boiled in ethanol?
Iodine solution is used to test leaves for the presence of starch. add the leaf to boiling ethanol in a water bath for a few minutes (the boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf – it turns white so it is easy to see the change in colour)
Where do air bubbles come from?
Air bubbles form when the amount of dissolved air in a solution exceeds the saturated solubility. Saturated solubility is the amount of air that eventually dissolves in a solution when it is left exposed to air and the air entering and leaving the solution are balanced (in equilibrium state).
Are bubbles oxygen?
Technically, these are bubbles formed from the dissolved gases that come out of the solution, so if the water is in a different atmosphere, the bubbles would consist of those gases. Under normal conditions, the first bubbles are mostly nitrogen with oxygen and a bit of argon and carbon dioxide.
Why is my water full of bubbles?
Cold water holds more air than warm water. Water under pressure holds more air than water that is not pressurized. Once the water comes out of your tap, the water is no longer under pressure and the air comes out of solution as bubbles (similar to a carbonated soft drink).
How long does boiled water stay sterile for?
Boiled water can be kept in sterilized, properly sealed containers in the refrigerator for 3 days or for 24 hours if kept at room temperature out of direct sunlight.
How long do you have to boil water to kill bacteria?
one minute
Can I brush my teeth during a boil water advisory?
A boil water advisory is a public health measure that suggests the possibility of bacterial contamination in the water system, making the water unsafe to drink tap water without boiling it first, according to the Centers for Disease Control. It is NOT safe to use contaminated water to brush your teeth!