Photosynthesis SRA

Learn about photosynthesis! Understand how plants make food using sunlight, water, and CO2.

Vocabulary photosynthesis (foh toh SIN thuh sis) process that uses energy from sunlight to change water and carbon dioxide into glucose and oxygen Photosynthesis creates _ glucose carbon dioxide water Reading Comprehension The visible spectrum is the part of the sun's energy that makes light that you can see. Have you ever seen sunlight streaming through a prism? A prism separates wavelengths of light. Light contains the colors red, orange, yellow, green, blue, indigo, and violet. Scientists call this the visible spectrum.Plants use light-absorbing chemicals called pigments to gather the sun's energy. A green plant's main pigments are called chlorophyll. These pigments reflect green wavelengths, which makes the plants look green. All the other color wavelengths are absorbed by the plant. The light energy from those wavelengths is stored in plant molecules as chemical energy. Light absorbing chemicals in plants are called _ spectra pigments wavelengths When plants absorb light, they absorb the energy in that light. Chlorophylls reflect green light and absorb other colors. Different pigments, such as orange carotene, absorb different wavelengths of light. In the fall, cool weather and long nights cause leaves to stop making chlorophylls. Then other pigments become visible. The pigments reflect colors other than green, so the leaves take on those different colors.Photosynthesis is the process of using the energy in light to make sugars. Photosynthesis is actually a series of chemical changes, which are reactions that make new products. During photosynthesis, carbon dioxide and water. react in the presence of light energy to produce glucose, which is a kind of sugar, and oxygen Photosynthesis is a series of _ plant pigments light reflections chemical changes Light-absorbing chlorophylls are located inside a plant's cells in organelles called chloroplasts. The reactions that take place during photosynthesis occur inside the chloroplasts.The final products of the photosynthesis reactions are sugars and oxygen. The sugars are used by the plant for other life processes, including building tissues and reproduction. These processes require energy in the form of food. The fruit shown on the front of this card was created using energy from photosynthesis. It also has stored energy in its tissues. The final products of photosynthesis are _ pigments and energy carbon dioxide and water sugar and oxygen Plants use the energy in sunlight to make sugars. Then they use those sugars for the energy they need to live. To get the energy you need, you must consume, or eat, food. You are a consumer. Plants produce, or make, their food. Plants are producers.Photosynthesis can occur at different rates depending on light intensity, or brightness. Some plants, such as desert cacti, have adaptations that allow them to photosynthesize at a higher rate when the sun is less intense. This adaptation reduces water loss. Plants are producers because _. they make their own food They conserve water They work only during the day Photosynthesis in most plants takes place at higher rates between 0°C and 35°C. When temperatures are below freezing, some plants, such as conifers, may not photosynthesize at all. Likewise, high temperatures may slow or even stop photosynthesis in desert plants.One of the products of photosynthesis is oxygen. Because they take up carbon dioxide and release oxygen, plants are an important part of the carbon cycle. The oxygen that plants release during photosynthesis is a product of the _ carbon cycle water cycle nitrogen cycle What is the affect of temperature on photosynthesis rates? Fill in the correct equation for photosynthesis. Carbon dioxide + water + sunlight ----> Glucose + Oxygen Photosynthesis Diagram When light levels are highest, photosynthesis _ speeds up slows down levels out The y-axis represents the _ the rate of photosynthesis light levels rate of change The x-axis represents the _ the rate of photosynthesis light levels rate of change