Question

select the statement(s) that best describe what happens during physical and chemical weathering. chemical weathering is the breakdown of rock by chemical processes. physical weathering occurs when materials go through oxidation, breaking down and dissolving rocks in contact with acids. chemical weathering is when the rocks or minerals react chemically with air or water to form new substances. physical weathering is the physical breakdown of rocks and minerals. physical weathering occurs when rocks and minerals are broken down by wind, water, ice, living things, and temperature or pressure changes.

Explanation:

• For "Chemical weathering is the breakdown of rock by chemical processes": Chemical weathering involves chemical reactions (like oxidation, dissolution) to break down rocks, so this is correct.
• For "Physical weathering occurs when materials go through oxidation, breaking down and dissolving rocks in contact with acids": Oxidation and reaction with acids are chemical processes, so this describes chemical weathering, not physical. So this is incorrect.
• For "Chemical weathering is when the rocks or minerals react chemically with air or water to form new substances": Chemical weathering includes reactions with air (e.g., oxygen) or water to form new compounds (like rusting, dissolution), so this is correct.
• For "Physical weathering is the physical breakdown of rocks and minerals": Physical weathering is about breaking rocks into smaller pieces without changing their chemical composition (e.g., by wind, water, ice), so this is correct.
• For "Physical weathering occurs when rocks and minerals are broken down by wind, water, ice, living things, and temperature or pressure changes": These are all physical agents (mechanical forces) that break rocks physically, so this is correct.

Answer:

• Chemical weathering is the breakdown of rock by chemical processes.
• Chemical weathering is when the rocks or minerals react chemically with air or water to form new substances.
• Physical weathering is the physical breakdown of rocks and minerals.
• Physical weathering occurs when rocks and minerals are broken down by wind, water, ice, living things, and temperature or pressure changes.