Photosynthesis test

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Photosynthesis

The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Word equation for photosynthesis

Carbon Dioxide + Water → Glucose + Oxygen

Chemical equation for photosynthesis

H₂O + CO₂ + Light Energy → C₆H₁₂O₆ + O₂

Importance of photosynthesis

It produces oxygen and removes carbon dioxide from the atmosphere.

Palisade mesophyll

The part of the leaf where most chloroplasts are found and where photosynthesis occurs.

Stomata

Tiny openings in a leaf that allow for gas exchange.

Guard cells

Cells that regulate the opening and closing of stomata.

Veins in a leaf

Structures that contain xylem and phloem, responsible for transporting substances in the plant.

Xylem

The tissue in plants that transports water from the roots to the leaves.

Phloem

The tissue in plants that transports glucose from the leaves to other parts.

Experiment results of light on photosynthesis

With light, oxygen levels increase and carbon dioxide levels decrease due to photosynthesis.

Effect of darkness on respiration

In the absence of light, respiration occurs, leading to increased CO₂ levels and decreased O₂ levels.

Leaf Structure and Photosynthesis

Leaves have a large surface area and a flat, thin shape, with palisade and spongy mesophyll cells arranged to maximize sunlight capture for efficient photosynthesis.

Experiment 1: Photosynthesis in Elodea

• Investigates how different factors affect the rate of photosynthesis by counting oxygen bubbles produced from pondweed in water with a fixed light source.

Experiment 2: Light Distance and Photosynthesis Rate

• Shows how the distance between the light affects the number of gas bubbles produced during photosynthesis from pondweed

• meaning that the farther the distance from the light results in lower the photosynthesis rates and fewer bubbles.

Experiment 4: Measuring Gas Production in Photosynthesis

• A setup with pondweed in water and a gas collection tube to measure the volume of oxygen produced.

• The aim is to measure the rate of photosynthesis by collecting and analyzing the amount of oxygen gas produced.

Experiment 3: Testing Photosynthesis Under Different Light Conditions

• Uses test tubes with pondweed and an indicator solution to see how light intensity affects photosynthesis.

• Color changes indicate CO₂ levels: purple (less CO₂, more photosynthesis) and yellow (more CO₂, less photosynthesis).

What are the 4 things plants can convert glucose into?

Starch, cellulose, lipids(fats), and amino acids

What are the limiting factors of photosynthesis?

Concentration of CO2, temperature, and light intensity.

What color is hydrogen bicarbonate in the presence of carbon dioxide?

The color of hydrogen bicarbonate is yellow in the presence of carbon dioxide.

What color is hydrogen carbonate without the presence of carbon dioxide.

The color of hydrogen carbonate is red or orange without the presence of carbon dioxide.