Question

let’s apply what we know about photosynthesis to some lab analysis:

1. amelia and eddy have 10 leaf discs that they have sunk. they have 2 beakers. they put 5 leaf discs in each beaker. they put beaker #1 under one lamp and put beaker #2 under 3 lamps. they expect the leaf discs in beaker #2 to float faster. why?

1. z’niyah and kayla have 10 leaf discs that they have sunk. they have 2 beakers. they put 5 leaf discs in each beaker. they know that baking soda is a source of carbon dioxide, so they put a normal amount of baking soda in beaker #1 and extra baking soda to beaker #2. they expect the leaf discs in beaker #2 to float faster. why?

1. tony and angelina have 15 leaf discs that they have sunk. they have 3 beakers. they put 5 leaf discs in each beaker. all 3 beakers have bromothymol solution (the color change solution) inside. in beaker #1 the solution is blue (no carbon dioxide). in beaker #2 the solution is green (some carbon dioxide). in beaker #3 the solution is yellow (lots of carbon dioxide). which set of leaf discs should they expect to float fastest? why?

1. ms. geissle gave manaal and zion 3 leaves from the fish tank. they have 3 beakers. all 3 beakers have yellow bromothymol solution (the color change solution) inside. in beaker #1 they put 2 leaves. in beaker #2 they put 1 leaf. in beaker #3 they put no leaves. which one should they expect to turn blue fastest? why?

Explanation:

Question 3

Light is a key factor for photosynthesis. Beaker #2 has 2 lamps, providing more light energy than Beaker #1 (1 lamp). More light means a higher rate of photosynthesis in the leaf discs of Beaker #2. During photosynthesis, oxygen is produced, which accumulates in the leaf discs, reducing their density and making them float. So more light leads to faster oxygen production and faster floating.

Baking soda provides carbon dioxide (CO₂), a reactant for photosynthesis. Beaker #2 has extra baking soda, so it has a higher concentration of CO₂ than Beaker #1. More CO₂ increases the rate of photosynthesis, leading to faster oxygen production. The oxygen accumulates in the leaf discs, decreasing their density and making them float faster.

Carbon dioxide (CO₂) is needed for photosynthesis. Beaker #3 has yellow bromothymol solution, indicating lots of CO₂. Beaker #2 has some CO₂ (green solution), and Beaker #1 has no CO₂ (blue solution). More CO₂ leads to a higher photosynthesis rate. Higher photosynthesis produces more oxygen, which accumulates in the leaf discs, reducing their density. So the leaf discs in Beaker #3 (with the most CO₂) will float fastest.

Answer:

The leaf discs in Beaker #2 are expected to float faster because it has more lamps (more light), which increases the rate of photosynthesis. Higher photosynthesis produces oxygen faster, making the discs float quicker.

Question 4