Question

1. what happened to the number of bubbles as the jar was moved farther from the light? 2. look at the line - graph. how many oxygen bubbles are released if the distance between the jar and the light is 5 cm? 10 cm? 13 cm? 3. explain how the experiment shows that light is needed for photosynthesis.

Explanation:

Step1: Analyze the relationship between light - distance and oxygen bubbles

As the jar is moved farther from the light, the intensity of light decreases. Photosynthesis is light - dependent, and less light means less photosynthesis occurs. Since oxygen is a by - product of photosynthesis, fewer oxygen bubbles are released.

Step2: Estimate oxygen bubbles for different distances

We assume a general trend of decreasing oxygen bubbles with increasing distance. Looking at the data table, we can try to find a pattern (e.g., linear or exponential decrease). However, without actually plotting the data precisely on a graph, we can make a rough estimate. If we assume a somewhat linear decrease (for simplicity), we can use interpolation or extrapolation.

Step3: Answer question 2

For a distance of 5 cm, we look at the trend of the data. If we assume a linear relationship (a basic approximation), and we know the values at 0 cm (let's say the maximum number of bubbles) and at larger distances. As the distance increases, the number of bubbles decreases. For 5 cm, we might estimate a relatively high number of bubbles compared to larger distances. If we assume the data follows a simple linear pattern, we can estimate the number of bubbles. Similarly, for 10 cm and 13 cm, we use the trend of the data to estimate the number of oxygen bubbles released.

Step4: Answer question 3

The experiment shows that as the distance between the light and the jar increases, the number of oxygen bubbles decreases. This indicates that more light is needed for a higher rate of photosynthesis. When the light is closer (less distance), more light energy is available for the photosynthetic organisms in the jar, leading to more photosynthesis and more oxygen production. When the light is farther away, less light energy is available, reducing the rate of photosynthesis and the amount of oxygen produced.

Answer:

1. As the jar is moved farther from the light, the number of oxygen bubbles decreases because less light is available for photosynthesis.
2. Estimated number of oxygen bubbles for 5 cm: [Estimated high number based on trend, e.g., 15 (this is just an example estimate)]. For 10 cm: [Lower number than 5 cm estimate, e.g., 8]. For 13 cm: [Even lower number, e.g., 5]. (These are example estimates and should be adjusted based on actual graphing and analysis of data).
3. The experiment shows that light is needed for photosynthesis as the amount of oxygen bubbles (a product of photosynthesis) decreases with increasing distance from the light source, indicating a lower rate of photosynthesis with less light availability.