5. A sign of fall is the color change and subsequent shedding of leaves by deciduous trees. The following question has been posed about these changes:
What triggers the changes in deciduous trees that we observe every fall?
Evaluate the plausibility and testability of this scientific question. Refine the question as necessary. (4 points)
Answers
Answer:
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's metabolic activities. This chemical energy is stored in carbohydrate molecules, such as sugars, which are synthesized from carbon dioxide and water – hence the name photosynthesis, from the Greek phōs "light", and sunthesis "putting together".
Answer:
1. It takes a lot of energy to make chlorophyll. If the plants break down the chlorophyll and move it out of their leaves before the leaves fall, plants save energy. ... So the different colors in leaves are caused by changes in the pigments. When the weather changes, some plants break down all the green pigment.
2. A hypothesis is a tentative answer to a scientific question. A testable hypothesis is a hypothesis that can be proved or disproved as a result of testing, data collection, or experience. Only testable hypotheses can be used to conceive and perform an experiment using the scientific method.