Chemistry
Chemistry, 16.07.2019 08:30, greend0719

Aplant uses carbon dioxide and water to form food and oxygen. why is this a chemical change? the mass of the plant increases greatly. the properties of water and food are same. the plant increases in height as food is produced. the properties of carbon dioxide and oxygen are different.

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Biology, 03.07.2019 22:30, jjjoooorrrrddddaannn
Need for science! 1. which of the following sets of words can be used to describe the outputs of photosynthesis? a. water, glucose, light energy b. carbon dioxide, glucose, chemical energy c. oxygen, glucose, chemical energy d. glucose, oxygen, light energy 2. an aquatic plant known as the elodea is shown in the image below. if you observe the elodea leaves over a period of several minutes, you see bubbles forming on the leaf surface that eventually break away and rise to the surface of water. these bubbles form as a result of photosynthesis. suppose that three samples of water are prepared as described in the following table. three identical elodea plants are places in each of these water samples at the same time how will the rate of the bubble formation compare in three samples? samples a addition of carbon dioxide b addition of oxygen c degassed to remove all gases a. a> b> c b. c> b> a c. b> a> c d. a> c> b 3. which of the following is true about producers? a. they are to some ecosystems and not essential to any ecosystem. b. they are to all ecosystems but not essential to any ecosystems. c. they are essential to some ecosystems. d. they are essential to all ecosystems. 4. which of the following illustrates the energy changes taking place during photosynthesis? a. light energy from sun --> chemical energy bonds of glucose b. chemical energy in bonds of glucose --> light energy from sun c. light energy from sun --> chemical energy in bonds of carbon dioxide d. chemical energy in bonds of carbon dioxide --> light energy from sun 5. a plant deprived of light dies. which of the following best explains why this happens? a. the plant need light to make its food. b. light allows the plant to make food for other organism c. without light, the plant has no signals to be able to grow d. plants need light to reproduce
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Предмет
Biology, 07.07.2019 12:00, yesseniaroman21
Need for science! 1. which of the following sets of words can be used to describe the outputs of photosynthesis? a. water, glucose, light energy b. carbon dioxide, glucose, chemical energy c. oxygen, glucose, chemical energy d. glucose, oxygen, light energy 2. an aquatic plant known as the elodea is shown in the image below. if you observe the elodea leaves over a period of several minutes, you see bubbles forming on the leaf surface that eventually break away and rise to the surface of water. these bubbles form as a result of photosynthesis. suppose that three samples of water are prepared as described in the following table. three identical elodea plants are places in each of these water samples at the same time how will the rate of the bubble formation compare in three samples? samples a addition of carbon dioxide b addition of oxygen c degassed to remove all gases a. a> b> c b. c> b> a c. b> a> c d. a> c> b 3. which of the following is true about producers? a. they are to some ecosystems and not essential to any ecosystem. b. they are to all ecosystems but not essential to any ecosystems. c. they are essential to some ecosystems. d. they are essential to all ecosystems. 4. which of the following illustrates the energy changes taking place during photosynthesis? a. light energy from sun --> chemical energy bonds of glucose b. chemical energy in bonds of glucose --> light energy from sun c. light energy from sun --> chemical energy in bonds of carbon dioxide d. chemical energy in bonds of carbon dioxide --> light energy from sun 5. a plant deprived of light dies. which of the following best explains why this happens? a. the plant need light to make its food. b. light allows the plant to make food for other organism c. without light, the plant has no signals to be able to grow d. plants need light to reproduce
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