Introduction
Duckweeds are small aquatic plants that float on the surface on bodies of water. One plant has a leaf-like structure with a root under the plant. The diameter of a leaf is usually not more than 0.5 cm (Duckweed).
The water in its habitat has to be slow-moving or still, no faster than 0.3 m/second. Therefore they grow in areas that are protected from wind and waves. The water has to be nutrient-rich and fresh or brackish. They can be found in many places in the world as they can live in a range of different climates, although they grow the best in warmer regions, such as tropical and temperate regions. This is because the water temperature has to be between 6 and 33 degrees Celsius for duckweeds to grow.
Nutrients must be available
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This will be done by adding different amounts of the nutrient into cups with duckweed and measure the growth of the duckweed. The cups shall contain 30 ml of water and be divided into 5 sets of three. The first set will not contain any trisodium phosphate, the second will contain 0.01 grams, then 0.1, then 1 and lastly 10 grams. 3 duckweed plants are added to each cup and then the plants are added, the number of leaves are counted. As the leaves are quite similar in size, this will serve as the measuring tool for the following measurements along with the number of …show more content…
This is important because sunlight is important in photosynthesis. If the plants in some cups receive more, they might experience a more rapid growth.
Temperature
As duckweed cannot grow in certain temperatures it will be kept the same. The initial temperature will be measured and controlled in the water using a thermometer. The placement of the cups will also be taken into consideration. The cups will not be placed in anything that can change the temperature such as a heater. The cups will be placed in the same place so that all cups experience the same temperature.
Wind and waves
The cups will be kept in a place where there is no draft of wind. A place where the water will be absolutely still, as it otherwise may kill the plants
Water and water source
Deionized water will be used in order to make sure that all plants have an equal start. In tap water there can be minerals and perhaps even nutrients. Using deionized water makes sure that there No nutrients from start that could otherwise affect the experiment. There will also be no pollutants. The cups will not be placed indirect sunlight either as this might cause the water to
First, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder. This water was then poured into the styrofoam cup that will be used to gather the hot water later. The water level was then marked using a pen on the inside of the cup. The water was then dumped out, and the cup was dried. Next, 100 mL of regular deionized water was measured using a 100 mL graduated cylinder, and the fish tank thermometer was placed in the water. Once the temperature was stabilizing in the graduated cylinder, the marked styrofoam cup was filled to the mark with hot water. Quickly, the temperature of the regular water was recorded immediately before it was poured into the styrofoam cup. The regular/hot water was mixed for a couple seconds, and the fish tank thermometer was then submerged into the water. After approximately 30 seconds, the temperature of the mixture leveled out, and was recorded. This was repeated three
The objective of this experiment is to determine which of three weed kill methods will be most successful in killing the Cobblers peg weed over a five day period. Two of the weed kill methods are natural - boiling water and vinegar solution. One of the weed kill methods is a weed spray Yates ZERO.
Many variations and species of plants can be found all around the world and in different habitats. These variations and characteristics are due to their adaptations to the natural habitat surrounding them. In three of many climatic zones, the arid, tropical and temperate zone, plants that vary greatly from each other are found in these locations. In this experiment, we’ll be observing the connection between the adaptations of the plants to their environment at the Fullerton Arboretum. The arboretum is a space containing numerous plants from different environments. The plants are carefully looked after and organized into their specific habitat. Therefore, we’ll be able to take a look at the plants within multiple
The temperatures will be set up by using ice to cool tap water down to lower temperatures and boiling water to heat it up. The temperature will be measured to within 0.1°C on a mercury thermometer to ensure accuracy. The temperatures will range from 10°C to approximately 40 °C and it will be done at 5° C intervals.
The germinating seeds consumed almost no oxygen throughout the experiment in the 10-degree C water bath. I think that this is because when an organism cools down, all of its cellular functions slow down.
14. Gradually add beads so that the final volume equals the final volumes of the germinating peas and the dormant peas plus beads. All three groups should have equivalent volumes at the start of the experiment.
Snyder, R. (2009). Water In The Greenhouse. Growing Produce. Retrieved on March 20, 2014 from http://www.growingproduce.com/uncategorized/water-in-the-greenhouse/
To make the test fair I will use the same amount of water and the leaf
Variables --------- During the experiments, the water will be heated using different spirit burners containing different alcohols. I will be able to change different parts of the experiment. These are the. Volume of water heated:
Investigating Heat Loss From a Container Planning We are investigating heat loss from a container and how it is affected. We could change: Room temperature Surface area Amount of water Use a lid Insulate around it Colour of tin We could measure / observe: Amount of time Temperature We will change: Surface area We will measure / observe: Temperature (every minute for 5 minutes) Our question is: Does surface area effect the rate of heat loss? We will keep these the same: Colour of tin Room temperature Amount of water Use a lid Insulate around it Preliminary investigation = == ==
Then, repeat steps 7-11 another 4 times but with the room temperature water. For the room temperature water just leave it in the room but try not to change the room’s temperature. 15. Try to put all your recorded data into a table for organization 16. Repeat the entire experiment for more reliable data.
Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
We used wheatgrass were 40 wheatgrass seeds, two empty pots, soil, and water. We first added soil for both pots and 20 wheatgrass seeds in each pot. My partner and I decided that we label pot one experiment which is “sugar and water” and pot two control which is “water” only. The experiment was for almost four weeks we had to make sure both get the same room temperature and water, so we can see the results after this amount of time. Both pots had same room temperature so both can have the same amount of sunlight also, the same amount of water which is a glass of water from the sink once a week. In the experiment pot we added a glass of water with one teaspoon of sugar and the control pot glass of water. Every week we used to see both pots grow almost the same. At the end of the experiment, my partner and I measured the length for both plants and we recorded the average for each plant, so we can know the rate of growth
The “Fast Plant” experiment is an observation of a plants growth over the span of twenty-eight days. The objective is to observe how plants grow and use their resources throughout the span of their life. In our lab we observed the Brassica rapa, a herbaceous plant in the mustard family which has a short cycle which makes it a perfect plant to observe in this experiment. Like other plants the Brassica rapa must use the resources in the environment to create energy to complete itʻs life cycle and reproduce. By observing the plant it is easy to see in what organ or function the plant is using itʻs energy and resources and if overtime the resources switch to other part of the plants. By conducting this experiment we are able to observe where and how plants allocate their resources throughout their life by harvesting plants at different points in their life.
fuel, heat loss and shape of the type of wick. The type of fuel, heat loss will be the variables to change. We will measure to control the temperature of the water using a