Need some help on answering questions...
1. Arrange corn syrup, water, and vegetable oil in order of low to high visocisity.
2. Why do silica-poor magmas produce broad volcanoes with gentle slopes?
Viscosity is the resistance of a liquid to flow. So the better the substance flows the lower its viscosity is, water has the lowest viscosity of your group.
Silica content increases viscosity. So if the magma is silica poor the magma will have a low viscosity meaning it will flow easily. A magma that flows easily will result in a milder volcanic eruption. One where the magma gently runs down the hill side instead of a violent eruption resulting in huge amounts of thick magma quickly erupting out. Does that help?
1. To arrange corn syrup, water, and vegetable oil in order of low to high viscosity, we need to understand what viscosity means. Viscosity refers to the resistance of a fluid to flow. A fluid with low viscosity flows easily, while a fluid with high viscosity flows slowly or resists flowing altogether.
One way to determine the viscosity is to observe the flow rate. Place equal amounts of corn syrup, water, and vegetable oil in separate containers. Tilt each container slightly and observe how fast or slow the fluid flows. Note the differences in flow rates among the three substances.
Based on the flow rates observed, you can arrange the substances in order of low to high viscosity.
2. Silica-poor magmas, also known as mafic magmas, produce broad volcanoes with gentle slopes due to their low viscosity. The viscosity of magma depends on its composition, temperature, and the amount of dissolved gases, particularly silica content.
Silica, or silicon dioxide (SiO2), is a mineral that adds viscosity to the magma. Silica-rich magmas, known as felsic or acidic magmas, have high viscosity, and they tend to be more explosive. On the other hand, silica-poor magmas, or mafic magmas, contain less silica and have lower viscosity.
The lower viscosity of mafic magmas allows them to flow more easily, creating broad volcanoes with gentle slopes. These volcanoes, often referred to as shield volcanoes, are characterized by their low-profile shape, formed by the gradual build-up of fluid lava flows. The lower viscosity allows the magma to spread out over a larger area, resulting in a less explosive eruption and the formation of gentle slopes.