Copy Of Soil Notes And Percolation Lab Quiz 2

The correct answer describes the porosity of the set of soil particles as not porous, densely packed, and having a uniform grain size. This means that the particles are closely packed together, leaving little to no space for air or water to flow through. Additionally, the particles have a consistent size, which further reduces the porosity.

The diagram provided suggests that the two ingredients in soil that are equal percentages are air and water. The diagram likely shows a representation of soil layers, with one layer representing air and another layer representing water. This indicates that both air and water are present in equal amounts within the soil composition.

The given answer "Sticky, muddy, tiny grained" best describes the classroom substrate sample of clay. Clay is known for its sticky and muddy texture, and it consists of tiny grains.

The terms "gritty, grainy, and coarse" best describe the classroom substrate sample of coarse beach sand. These terms suggest that the sand has a rough texture, with visible grains that are larger in size.

Clay is the correct answer because it has small particles that are tightly packed together, creating a dense structure. This structure restricts the movement of water, allowing only a minimal amount to pass through. As a result, clay retains or holds the most water compared to the other substrates listed.

The correct answer is silt. Silt is a sediment grain size that falls between the sizes of clay and sand. It is finer than sand but coarser than clay. Silt particles are small and smooth, and they have a moderate ability to retain water. They are often found in river beds and floodplains and can be easily transported by water.

The given correct answer for the question "Identify the sediment grain size # 3" is clay. Clay is a type of sediment grain size that is characterized by its small particle size and smooth texture. It is finer than both coarse sand and fine sand, and it is also finer than silt. Clay particles are typically less than 0.002 mm in diameter and have a high plasticity when mixed with water. They can easily be molded and shaped, and they have a high water-holding capacity. Clay is commonly found in areas with low energy environments, such as lakes and swamps.

The correct answer is "Porous, void space, packed large grain size". This is because the answer describes soil particles that have a large grain size, allowing for void spaces or gaps between the particles. These void spaces create porosity, which refers to the amount of empty space within a material. Additionally, the particles are described as being packed, indicating that they are tightly arranged, further contributing to the porosity of the soil.

Adhesion is the attraction between different molecules, in this case, between water molecules and the soil particles. This attraction allows the soil to hold onto water molecules, causing water to percolate more slowly in silt and clay soils. Adhesion is responsible for the water molecules sticking to the soil particles, preventing them from easily moving through the soil.

Sediment is considered soil under water because it is found in various aquatic environments, such as the bottom of oceans, lakes, and river beds. Similar to soil on land, sediment consists of fine-grained particles that can support the growth of plants and organisms. Therefore, sediment can be considered as soil underwater due to its widespread presence and ability to sustain life.

The terms "spongy, soft, earthy, twiggy" best describe the classroom substrate sample because they suggest a texture that is soft and easily compressed, with an organic feel and possibly containing small pieces of plant material.

The given answer, "Small grained, light weight," best describes the classroom substrate sample, Dune Sand. This suggests that the sand particles are small in size and the overall weight of the sand is relatively light.

The term "silt" is best described as smooth, slippery, soft, and not sticky. Silt particles are fine and smooth, which gives the substrate a smooth texture. It is also slippery because of its fine particles that allow for easy movement. Silt is soft to touch and does not stick together, unlike sticky substances. Therefore, the terms smooth, slippery, soft, and not sticky accurately describe the classroom substrate sample.

The sediment grain size for #1 is coarse sand because it is larger than fine sand, silt, and clay. Coarse sand typically ranges from 2 to 0.2 millimeters in diameter, making it larger than fine sand but smaller than gravel.

The correct answer is "Low porosity, mixed grain sizes". This means that the soil particles have a small amount of empty space between them and they have different sizes. This combination of low porosity and mixed grain sizes indicates that the soil is not very permeable and may have limited water and air flow through it.

The diagram shows that soil includes four main ingredients: minerals, organic matter, water, and air. Among these ingredients, minerals make up the largest percentage. Therefore, the correct answer is minerals.

The correct answer is "Bottom material organisms live in or on." This answer accurately defines what a substrate is in the context of ocean organisms. A substrate refers to the bottom material in the ocean where organisms can either live on or in. It provides a habitat and support for various marine life forms.

Loam/peat is the correct answer because it has a balanced texture that allows for quick percolation of water, while also retaining moisture and nutrients for the habitat. Loam/peat is a mixture of sand, silt, and clay, which gives it the ability to provide good drainage and aeration, while also holding onto moisture and nutrients. This makes it an ideal substrate for barrier islands, as it can support a diverse range of plant and animal life.

Soil is a combination of weathered rock and decayed organic matter. This means that it is composed of tiny particles of rock that have been broken down over time, as well as decomposed plant and animal materials. This mixture provides the necessary nutrients and minerals for plants to grow. Additionally, the organic matter in soil helps to retain moisture and improve soil structure. Overall, soil is a complex and vital component of the Earth's ecosystem, supporting plant life and providing a habitat for many organisms.

Coarse sand is the correct answer because it has larger particles compared to fine sand, silt, clay, and loam/peat. The larger particles create larger spaces between them, allowing water to pass through quickly without being absorbed. This makes coarse sand the most permeable substrate for water flow.

Silt is the correct answer because it is a fine substrate that allows water to filter through when wet. Unlike clay, which can become compacted and not allow water to pass through easily, silt retains moisture while still maintaining a soft texture. Coarse sand, fine sand, and loam/peat do not have the same ability to retain moisture and filter water as silt does.