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This practical gives student's the opportunity to self-regulate their learning by referring to their manual and checking if they are carrying out the steps correctly. By carrying out the steps correctly they can identify and follow the chart with ease.

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Students will really focus on the importance of labelling in this investigation and the manipulation of apparatus.

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Students will have to accurately measure each fraction of the soil collected by the various mesh sizes and record it appropriately. By recording it appropriately they can later calculate the percentages needed to help classify the soil by its texture.

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Students will be able to agitate the suspension by stirring it vigorously for several minutes to ensure that all soil particles are well-dispersed. They will measure the sediment layers: After the settling period, measure the thickness of each layer of sediment using a ruler or calipers. The sediment will be sorted into three layers: sand, silt, and clay. Students will interpret the results they recieve and  calculate the percentages of each layer: Calculate the percentage of sand, silt, and clay in the sample based on the thickness of each layer. The percentage of sand is the thickness of the sand layer divided by the total thickness of sediment, multiplied by 100. Students will apply their knowledge of soil types to the soil texture triangle or other soil classification systems in order to come to a informed conclusion.

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Use the same amount of soil for each sample and add the same amount of water, by controlling these factors a fair test is ensured.
Students must also work off the same key that allows you to classify the soil for each soil sample.

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The dependent variable would be the soil texture classification. Soil texture classification is determined based on the relative amounts of sand, silt, and clay in the soil sample. With the hand testing experiment, the thickness of each sediment layer (sand, silt, and clay) is measured after the soil-water suspension settles, and the percentage of each layer is calculated based on their thickness. The percentage of sand, silt, and clay is used to determine the soil texture classification, which is the dependent variable.

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The independent variable for this experiment is the use of various soil types, a sandy soil compared to a clay soil will have different textures and therefore can be manipulated during the course of the investigation.

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The controlled variable of this experiment is the amount of sunlight, oxygen and water that the seeds receive. These factors are essential for growth and therefore they must be consistent throughout the experiment in order for there to be an equal opportunity for the seeds to grow.

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The dependant variable of this experiment is the number of seeds placed in each section of the tray. It is important to ensure that both sides of the tray have an equal amount of seed as it will mean that the data collected at the end of the experiment is consistent and easier to analyse.

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The independent variable for this experiment is the seed type. There is two different types of seed types used in this experiment and they will be compared to one another; Board certified seeds compared to uncertified seed.

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Students must use a key to compare their percentages to, this will them make identifications.

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The dependent variable would be the percentage of each soil particle size (sand, silt, and clay) in the soil sample. This is determined by weighing the soil particles that remain on each sieve and calculating the percentage of each soil particle size in the sample.

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The independent variable would be the size of the sieve openings used to separate the soil particles. The size of the sieve openings can range from coarse to fine, and this can affect the separation of sand, silt, and clay particles.

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Students must use a key to compare the percentages they calculated to determine the soil texture.

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The dependent variable would be the percentage of sand, silt, and clay in the soil sample. The thickness of each sediment layer (sand, silt, and clay) is measured after the soil-water suspension settles, and the percentage of each layer is calculated based on their thickness. The dependent variable is important because it provides the data that will be analyzed and interpreted to determine the soil texture of the sample.

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The independent variable would be the particle size distribution of the soil sample. The particle size distribution of the soil sample can be controlled by selecting different soil samples with varying amounts of sand, silt, and clay particles.

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Learning outcomes are identified and learning intentions are unpacked.

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By analysing and calculating the percentages of the fractions in each section of the sieve, ranging from coarse to fine, soil texture can be identified.

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By observing the settled pattern and calculating the percentages of clay, silt and sand of the sedimentation the soil texture can be determined.

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Based on the soils ability to be moulded and the feel of it when water has been added will determine the soil type and texture.

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Certified seeds will have a greater uniformity than uncertified seeds

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Title: Determine soil texture by hand testing

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Title: Determine soil texture by hand testing

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Title: Determine soil texture of a soil sample using a sieve

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Title: Determine soil texture of a soil sample using a sieve

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Title: Determine soil texture by sedimentation

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Title: Determine soil texture by sedimentation

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Title: Compare uniformity from certified and uncertified seeds

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Title: Compare uniformity from certified and uncertified seeds