Scientists tested the effect of a fertilizer on the growth of plants. They had 2 sets of plants, Group A which gets fertilizer, water and sun and Group B which gets only water and sun (but in equal amounts to Group A). 1. Explain how this scenario is a controlled experiment and identify the manipulated variable. The manipulated variable is the fertilizer since the other factors (water and sunlight) are given in equal amounts. It is a controlled experiment because one group receives fertilizer while the other does not. Any differences in growth should be due to either having fertilizer or not. 2. If the scientists only performed 1 experiment but it supported their hypothesis, why can it not be considered a theory? 1. Controlled because they test the effect of fertilizer, water and sunlight. Water and sunlight. 2. It is proved since the hypothesis is supported 3. Shows growing up 3. The graph below was created showing the growth of the plant. How would you know that the y-axis is measuring the growth of the plant? 4. You make the following measurements of an object – 22 kg and 42 m3. What would the object’s density be? Show your work for credit and include final units. I believe I need to divide the object mass by its volume. This value is the object 's density and expresses it in units of mass per unit of volume for 22kg mass that takes up a volume of 42 cubic meters. The density is 0.52 kilogram per cubic meter 5. Explain why a chlorinated swimming pool
Weight one piece of Zn, got 4.64g. Using 20ml initial volume measuring the volume of Zn, record data 0.7ml. Using equation Density=Mass/Volume, get the density of 100%Zn is 6.63g/ml.
Materials and methods describe the resources used in the experiment and how it was performed. Reading the methods of previous studies enables scientists to repeat the experiment and collect their own data. This data can be used to support other’s findings.
Measure the mass and calculate the density of the magnet using the correct significant figures and units. Show work for full credit. (2 points)
However, for each quad, the fertilizer used for the control was added altogether with the fertilizers being studied. Since the only plant that presented growth was in the control quad, it becomes necessary to explore the effects of excess fertilizers, and furthermore, excess nitrogen, would have in the development of the fast plants. Although Nitrogen is one of the elements most living organisms require, some studies have showed high levels of nitrogen can cause toxic stress to some plants, to the point where growth can be inhibited. (Yu et al.
2. Collect data: Click Slice. Choose a piece of Styrofoam and drag it onto the Material Investigation tray. Record the mass and volume, then calculate the density by dividing the mass by the volume. Replace the piece, and then repeat for the remaining pieces.
5. Calculate the density of an object that has a mass of 43 g and a volume of 56.0 mL.
In this experiment we are testing the effect of fertilizer on the speed of plant growth. We prepared a 4 quad cell, 1 control group and 3 experimental groups. So, we had one with no fertilizer, one with three seeds of fertilizer, one with six seeds of fertilizer, and lastly, one with nine seeds of fertilizer. The plants that we grew were called Wisconsin Fast Plants, members of the crucifer family. These plants are small and easy to grow, but for optimal growth they require continuous fertilizer, water, fluorescent light, and temperature between 18 degrees Celsius and 26 degrees Celsius 24 hours a day. Fertilizers are substances that are put into soils to increase the growth of the plant. There are two different types of fertilizers, synthetic
Purpose: Weighing objects. Figuring out the density with an object by calculated volume and Archimedes’ Principle.
The growth and survival of a plant depends on the reactions that occur internally called photosynthesis. Photosynthesis is a reaction that captures the sun’s energy and converts it, water, and carbon dioxide into glucose, with a byproduct of oxygen. Glucose is a sugar that provides energy to allow for a plant to grow and live. This experiment is to test how photosynthesis can be sped up with a home solution. The variable being changed in this experiment is the solution that the plant is being given. In this instance, some of the plants will be given Gatorade, rather than water. The question being asked is, How well will a solution found in the home affect plant growth?
To test a hypothesis about a given variable, experimental and control groups are tested in parallel. Which of
4. A solid block of exactly 100.0 cm3 has a mass of 153.6 g. Determine its density. Will the block
Dependent variable- jar volume after the egg is out (ml). Controlled variables- jar, same amount of water and corn syrup, same number of days it stayed there, same grade egg, same process, same surface we put them on. The experimental group are both the eggs because they both got tested on. We didn't have a control group because we didn't have an egg that didn't go through a test. The experimental group is the group you experiment on. The control group which doesn´t get tested
In Measuring and Understanding Density, several experiments were performed to find density of regularly shaped objects, irregularly shaped objects, liquids and gasses. An additional experiment was done to find the specific gravity of a sampling of liquids. The purpose of the experiment was to provide a better understanding of density and to be able to extrapolate unknowns based upon these calculations. The experiments yielded data in keeping with Kinetic-molecular theory in regards to the density of water versus its temperature. Key measurements and formulae were also used to determine densities of metal and plastic objects as well as irregularly shaped rocks. It is possible to find the density of an object (be it liquid, gas or
The plant experimented on, was wheat which is one of the world's most used products in creating carbohydrate foods i.e. cereal. The discerning factor of wheat is that it carries more use in comparison to rice or maize
The independent variable of this experiment were the different types of the solutions used, while the dependent variable was the mass of the cucumber slices. The constants were, the amount of liquid used and the time the cucumbers were left in the solution. While the control was the cucumber left in the cup with no solution. The students made a hypothesis saying that they believe that the cucumber slices put into the salt solution would decrease in mass while the cucumber put in the distilled water would increase in mass. In the end, the results of the experiment supported the students