hammer
chalk is made from a chalk like rock. The reson why its hard is because it a rock and the reson why it break so easy is because of its weight and size
If a rock is hard to break, it likely indicates that it has high strength and durability. It could be made of a dense material or have a strong mineral composition. This characteristic suggests that it can withstand significant force or pressure without fracturing or crumbling easily.
The roots of the tree break into the rock.
Water and freezing/cold weather can make rocks break. The water makes the rocks break when it goes into the rock cracks. When the weather gets cold/freezing the water expands and the rock breaks. Or with a really good hammer. LOL:P
Any form of mechanical weathering causes rock to break into smaller pieces. A landslide will definitely cause rock to break. Meteor impact, plant root growth, ice wedging, and the movement of animals will also cause weathering.
Hitting a rock can certainly cause some damage, depending on the size of the rock. Most commonly, the shear pin in the flywheel keyway will bend or break (it is made to do so) and the engine won't start or will be hard. Not as common is for the drive shaft to bend or break, or internal damage to the engine.
Belt the daylights out of it
Technically, yes. But, they are Christian Hard-Rock. Specifically Christian Hard-Rock.
Rock Hard was created in 1985.
Hard as a Rock was created in 1994.
Hard rock: GraniteSoft rock: Sandstone
any pokemon but some can break rock if you teach them the hm