1. What is the force behind mass movements?
C. gravity
2. Which of the following is NOT true about mass movements?
B. Mass movements always lead to landslides.
3. Oversteepened slopes often lead to mass movements because _____. (1 point)
D. the angle of their slope is greater than 40 degrees
4. When a block of material moves downslope along a curved surface, the type of mass movement is called _____.
C. a slump
5. A relatively rapid form of mass movement that is most common in dry mountainous regions is _____.
B. a mudflow
6. The average annual precipitation worldwide must equal the quantity of water _____.
A. evaporated
7. The ability of a stream to erode and transport materials depends largely on its ______.
C. velocity
8. The vertical drop of a stream channel over a certain distance is called _____.
C. gradient
number 4, I personally have never encountered that term. It may be correct.
others are correct.
All are correct nice job
for those who want to know all their answers are correct.
:3
To answer these questions, we need to understand the concepts related to mass movements, precipitation, and streams. Let's go through each question one by one and explain how to find the answers.
1. What is the force behind mass movements?
To determine the force behind mass movements, we need to understand the processes involved. Gravity is the force that pulls objects towards the center of the Earth. In the case of mass movements, the force of gravity causes materials, such as rocks and soil, to move downslope. Therefore, the correct answer is C. gravity.
2. Which of the following is NOT true about mass movements?
To identify which statement is NOT true about mass movements, we need to assess the options provided. The correct answer is B. Mass movements always lead to landslides. This statement is incorrect because, while landslides are a type of mass movement, not all mass movements result in landslides. Mass movements refer to the movement of materials downhill under the influence of gravity, which can include other types such as slumps and flows.
3. Oversteepened slopes often lead to mass movements because _____.
To determine why oversteepened slopes often lead to mass movements, we need to consider the conditions that contribute to unstable slopes. Oversteepened slopes have angles that exceed a critical value, typically around 40 degrees. When the angle of the slope exceeds this threshold, it becomes unstable, and the force of gravity acting on the materials can cause them to move downslope. Therefore, the correct answer is D. the angle of their slope is greater than 40 degrees.
4. When a block of material moves downslope along a curved surface, the type of mass movement is called _____.
To identify the type of mass movement that occurs when a block of material moves downslope along a curved surface, we need to understand the different types of mass movements. In this case, when a block of material moves along a curved surface, it creates a rotational movement. This type of mass movement is called a slump. Therefore, the correct answer is C. a slump.
5. A relatively rapid form of mass movement that is most common in dry mountainous regions is _____.
To determine the relatively rapid form of mass movement that is most common in dry mountainous regions, we need to consider the characteristics of such regions. Dry mountainous regions often have limited vegetation cover and relatively loose materials, which can easily mobilize during heavy rainfall or melting snow. This results in fast-moving mixtures of rock, soil, and water called mudflows. Therefore, the correct answer is B. a mudflow.
6. The average annual precipitation worldwide must equal the quantity of water _____.
To understand the relationship between global precipitation and water quantity, we need to consider the hydrological cycle. The hydrological cycle is the continuous movement of water between the Earth's surface, atmosphere, and back. In this cycle, precipitation refers to the total amount of water that falls to the Earth's surface in the form of rain, snow, or other forms. The quantity of water evaporated from the Earth's surface should be equal to the average annual precipitation worldwide to maintain a balance in the hydrological cycle. Therefore, the correct answer is A. evaporated.
7. The ability of a stream to erode and transport materials depends largely on its ______.
To determine the factors that influence a stream's ability to erode and transport materials, we need to consider the characteristics that affect its energy and capacity. The main factor that determines a stream's ability to erode and transport materials is its velocity. The velocity of a stream refers to the speed at which water flows, and higher velocities indicate stronger currents with more erosive power. Therefore, the correct answer is C. velocity.
8. The vertical drop of a stream channel over a certain distance is called _____.
To identify the term used to describe the vertical drop of a stream channel, we need to consider the features related to stream profiles. The gradient of a stream refers to the change in elevation of the stream channel over a certain distance. It represents the vertical drop as the stream flows downstream and reflects the steepness of the channel. Therefore, the correct answer is C. gradient.