Erosion involves moving. It is wearing down rock(s) into smaller pieces and then taking them away. Weathering breaks down rocks, either physically or chemically, but does not move them anywhere. Weathering and erosion are responsible for canyons, sea arches, valleys, and hoodoos. The Grand Canyon was caused by weathering and erosion.
Rocky coasts frequently have headlands, a high narrow piece of land that juts out into the sea. Weathering and erosion, in the form of ocean waves and water, break down the rock(s) and wash it away. The salt water also dissolves some of the rocks in the headlands. A sea arch is created when a hole forms through the headland. Eventually, more erosion will remove more weathered rock(s) and the arch will collapse, resulting in a sea stack.
Bryce Canyon National Park in Utah has many hoodoos in it. Like the sea arches and sea stacks, the hoodoos are created through weathering and erosion, but this time on land rather than the sea. Frost wedging is the primary weathering action. The strange shapes are due to the different minerals in the rock and the different speeds of weathering and erosion.
Ice can both erode and weather. Ice can weather rock(s) during frost wedging when it breaks the rocks. It can then move rocks when it takes them from one location to another. Glaciers are rivers of ice that move slowly downhill with gravity. During the last ice age, they covered large parts of the earth and left behind many landforms. As they move, they scrape the land underneath them and carry loose sediment and rocks. When they melt, they leave behind the sediment they picked up. The landforms created include U-shaped valleys, polished rock surfaces, shallow ponds, and the Great Lakes.