List features you think all rocks have in common.

Natural Formation: All rocks are naturally formed. They are not man-made but are created over time by various geological processes.

Solid State: Rocks are always in a solid state. They have a definite shape and volume.

Made of Minerals: All rocks are composed of minerals. These minerals can be the same type or a combination of different types.

Inorganic: Rocks are inorganic, meaning they do not contain any materials that were once part of a living organism.

Age: Rocks can be millions or even billions of years old. They provide a historical record of the Earth's past.

Texture: All rocks have a texture. This can range from very smooth to very rough, depending on the type of rock and the geological processes it has undergone.

Color: Rocks come in a variety of colors. The color of a rock can provide clues about its mineral composition.

Density: All rocks have density, which is the mass of the rock per unit of volume. This can vary greatly among different types of rocks.

Hardness: Rocks have varying degrees of hardness. Some rocks are very hard like diamonds, while others are soft like talc.

Resistance to Weathering/Erosion: All rocks, to varying degrees, resist weathering and erosion. However, over long periods of time, these forces can change the shape, size, and even the composition of rocks.