## How does light intensity affect Elodea?

The rate of photosynthesis in Elodea depends on the intensity of light. With increasing, water pollution levels light that reaches aquatic plants such as Elodea significantly decreases thus leading to lesser light intensity underwater (Denchak, 2018).

How do you measure the effect of light intensity of photosynthesis?

Light will be provided by a lamp and its light intensity can be controlled by moving the light source further away from the pondweed and following the inverse square law. For a given light intensity, the rate of photosynthesis will be measured by measuring the volume of gas displaced in a set amount of time.

### How did you measure the rate of photosynthesis of Elodea?

The rate of photosynthesis will be measured by counting the number of oxygen bubbles produced by the Elodea plants in each 2-minute trail. After completing a number of experiments, students and teachers will discuss their findings in relation to macro-level factors that affect ecosystem health and climate change.

How does light intensity affect the rate of photosynthesis experiment results?

More oxygen bubbles are produced when the light is closer to the beaker. So a greater light intensity gives a greater rate of photosynthesis.

## How does light intensity and distance affect the rate of photosynthesis?

The further the light moves from the plant, the fewer oxygen bubbles are produced by photosynthesis. The intensity of light at different distances from a light source can be described by the inverse square law.

How does light intensity affect plant growth experiment?

In general, higher light intensity or longer duration increased vegetative growth. Plants grown under the control condition had the greatest number of plants flowering, and 45% shade resulted in more flowering plants than 65% shade, regardless of photoperiod.

### How do you measure light intensity?

Lighting professionals use a light meter (also called an illuminance meter or lux meter) to measure the amount of light in a space/on a particular work surface. The light meter has a sensor that measures the light falling on it and provides the user with a measurable illuminance reading.

How is light intensity calculated?

The intensity is defined as power per unit area, and power is defined as energy per unit time. Thus: I=PA=EΔt1A.

## How does the distance of the lamp CM affect the rate of photosynthesis in Elodea?

In this experiment, the light intensity is changed by changing the distance of the source of light closer or further away from the elodea, so theoretically, when the intensity becomes stronger due to the light source being closer to the Elodea, the rate of photosynthesis should increase and therefore the number of …

How is intensity of light measured?

It is measured in footcandles or lux – it is the amount of light (lumens) falling on a surface (over any given square foot or square meter). Therefore, light intensity is measured in terms of lumens per square foot (footcandles) or lumens per square meter (lux).

### How can you measure light intensity?

A photometer is an instrument that measures light intensity. It can be defined as an instrument that measures visible light. Luminance measurements are used for products such as traffic lights and automobile tail lights.

What units are used to measure light intensity?

Summarizing, while light output is expressed in lumens, light intensity is measured in terms of lumens per square meter or lux.

## Why do I need different pieces of Elodea for each experiment?

Different pieces of Elodea should be used in each experiment as the Elodea’s photosynthesizing rate decreases over time. Remember: This is just a sample from a fellow student.

How do you measure bubbles in an Elodea?

Set up your meter ruler and lamp 50 cm away from the Elodea. Record the data accumulated over five minutes and count the bubbles that rise to the surface. Repeat this with 40cm, 30cm, 20cm, and 10cm.

### What if I don’t have enough Elodea to test the color film?

If you do not have enough solution, you may dilute it with a little water. Just be sure to use distilled water and dilute the entire supply only slightly. Write the name of the colored film to be tested on each cup (you can also use masking tape to label cups). Cut equal-sized pieces of elodea for each test tube or glass (about 3 inches in length).

How do you test for bromothymol blue with Elodea?

Cut equal-sized pieces of elodea for each test tube or glass (about 3 inches in length). Make sure that each piece looks healthy and has plenty of green leaves. Place a piece of elodea in each test tube or glass. Record the initial color of the bromothymol blue solution.