(1 Abrasion occurs due to _____. answer : D friction)

Hope this helps!

thanks they are all correct!

Correct

Congratulations on finding the correct answers for Unit 2 Lesson 7 of Connexus! Here's how you can arrive at the answers yourself:

(1) To determine the cause of abrasion, you need to understand the process. Abrasion occurs when two objects rub against each other, causing the wearing away or removal of material. This process is known as friction, which is the answer.

(2) To identify the characteristic of water responsible for frost wedging, you must know what frost wedging is. Frost wedging refers to the process where water penetrates cracks in rocks, freezes, and expands. The expansion exerts pressure on the rock, leading to its fracture or breakdown. Thus, the characteristic of water that is responsible for frost wedging is its expansion as it freezes, which is the correct answer.

(3) To determine which activity models the physical weathering of rock, you need to consider the definition of physical weathering. Physical weathering involves the breaking down of rock into smaller pieces without any chemical change occurring. Out of the options given, the activity that mimics this process is to place several cookies in a box and shake the box. By shaking the box, you are simulating the physical forces that cause the rock to break down mechanically, making it the correct answer.

(4) To understand how moving water contributes to physical weathering, you need to consider the effects of water flow on rocks. Water in rivers or streams carries sediment, such as rocks and minerals, and as this sediment is transported, the rocks can collide, bump, and rub against each other due to the movement of water. This constant rubbing and bumping can cause the rocks to break down physically. Therefore, moving water can contribute to physical weathering by causing rocks to bump against each other, which is the answer.

(5) To identify the term that describes the peeling off of outer layers of rock due to temperature changes, you need to understand what happens to the rock when exposed to temperature fluctuations. When a rock is subjected to heating and cooling cycles, it expands and contracts at different rates across its layers. This differential expansion and contraction can create stress within the rock, leading to the peeling off or flaking of its outer layers. This process is known as exfoliation, which is the correct answer.

I hope this helps you understand how to find the answers for this lesson and encourages you to continue self-learning and exploring!

thanks ! these are all correct !