How does gravity relate to a streams ability to erode and deposit material

You are sitting on the beach and wondering about the properties of mechanical waves. describe them in terms of ocean waves.

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

When an object is heated it contracts. a. true b. false