What was the independent and dependent in the experiment? These could have been solved if the water and fertilizer were precisely measured, if the plants were placed directly in the sun, and if the plants were taken care of everyday, however seeing as how the experiment was somewhat of a success the plants were sufficiently care for leaving little room for error. In the salt and water experiment, for example, the manipulated variable is the amount of salt added to the water. He has two tomato plants, Plant A and Plant B, that he grows in a window and gives the same amount of water. Scientific Method - Manipulated and Responding Variables... Give each group a scenario and ask them to design an experiment! 2. In all trials of the experiment, the plant with added chemical fertilizer produced the tallest plants. If you work hard to understand the problems and think deeply like a 4th grader, you will have no problem with this!Scientific Method - Controls and Variables ANSWER KEY Write a definition for each: Control - A part of the experiment that is not being tested and is used for comparison. Tomato plant A eventually died, and tomato plant B stayed healthy.What was the dependent variable in this experiment? ).Have the students think about the Seed Investigation and brainstorm variables that may not be controllable (e.g., giving plants different amounts of water, some plants being closer to a heat vent than others, using different types of soil, etc. The manipulated variable may also be called the independent variable. For an experiment, a scientist put lime at the base of tomato plant A and baking soda at the base of tomato plant B. In a science experiment, 10 tomato plants were given fertilizer in their water each week and 10 tomato plants were given plain water each week. To become a pro, follow along the PowerPoint with your notes, filling in when needed. However there was a sub experiment added during week six, if a previously fertilized plant is only watered and cut off from its fertilizer then it will grow at a faster rate than it would have with said fertilizer.The materials used consisted of tomato seeds, soil, four pots (two for the seedlings and two for the full grown tomato plants), water, sun light, carbon dioxide, homemade fungicide (one part milk nine parts water), and two fertilizers, one being one part urine and eight parts water and the other being a gallon of water with three tablespoons of molasses added. Constants: Same type of tomato seeds, same distilled water, same chemical/organic fertilizer, same pot, and the same type of dirt/soil used for planting. Jordan is doing a science fair project on the effects of music on the growth of tomatoes. At the end of each week, the height of each plant was measured. The tomato hypothesis: soda will grow the tallest tomato plants. Therefore my hypothesis was incorrect; the fertilizer lessened the growth of the plants rather than increased it. Results (results on website graph here represents the growth of the plants F is fertilized NF is not fertilized             After the third week the non-fertilized group grew consistently taller than the fertilized group. Which people are in the control group? Scientific Method - Manipulated and Responding Variables Jordan is doing a science fair project on the effects of music on the growth of tomatoes. Scientific Method - Manipulated and Responding Variables Page 1 of1 Name: Date:_ Scientific Method - Manipulated and Responding Variables Jordan is doing a science fair project on the effects of music on the growth of tomatoes. In his second experiment, what should he do different.In the same science fair, Tina asks the question “Does caffeine increase the heart rate of an earthworm?” In Test 1, she measures the heart rate by looking at the earthworm under a microscopes, the earthworm has a heart rate of 50 bpm (beats per minute). Correct answers: 3, question: In a science experiment, 10 tomato plants were given fertilizer in their water each week and 10 tomato plants were given plain water each week. Scientific Method ­ Manipulated and Responding Variables Jordan is doing a science fair project on the effects of music on the growth of tomatoes. Name:_____________________________________________ Date:_________ Independent variable: type of seeds used - Earth seeds versus space seeds (sometimes seeds are treated to space-like conditions in years when seeds do not go to space) Dependent variable: number of seeds that germinate Guided Practice Exercise 1. In a properly designed experiment, there will be only one manipulated variable. If a plant is fertilized consistently, then its height will also increase as a result. 8) Tina’s experiment should have included a hypothesis. The people who received the mint without the secret ingredient (Group B) would be the control group. 7) What is the responding variable in this experiment? These factors that must be kept the same are called the A failure to control variables other than the independent variable will mean that you will not know which factor is actually causing the effects you see. Throughout the growth period, Jordan counts the number of tomatoes produced by each plant.4) What should Jordan’s conclusion be? Plant A is In order to do so, scientists aim to make one change (the cause or An experimental inquiry typically has three main types of variables: an independent variable, a dependent variable and controlled variables. ” In the chart, students would identify the independent variable as the type of water and the dependent variable as the mass of the grapes. Its that easy! Scientific Method - Manipulated and Responding Variables. ... You design an experiment that would answer the question, your design may need to include a ...Manipulation variables is the main topic of this quiz and worksheet. This trend shows that although the fertilizer helped the seedlings grow faster they slowed growth because they were only meant for the plants to get a head start due to this unfertilized plants grew fruit faster than the fertilized plants. We will look at each of these three types of variables and how they are related to experimental inquiries involving plants.When a scientist chooses an independent variable (the cause), he/she anticipates a certain response (the effect). The non- fertilized plant also grew more healthily while also bearing fruit where the fertilized counterpart did not.

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