Organic Activity.
animal's actions- just got over this unit
How about QUARRY or MINE?
but head
Organic Activity.
Water will expand when heated. It it will also expand when frozen. Water seeping into narrow cracks in rock, could, when becoming frozen in winter, expand and force the narrow crack to become wider.
mechanical weathering +++ I'd class it as chemical weathering because the action is dissolution by weakly-acid, and it works only in limestone, gypsum and dolomite - although dolomite deposits are not normally structurally disposed to cave development.
Gophers cause physical weathering. They dig burrows in the ground, allowing more rock to be exposed.
Ice wedging is mechanical weathering caused by water flowing into cracks and freezing which expands the water. The ice crack grows larger and larger as the water freezes which expands the water and melts in spring and freezes which makes the crack larger and then melts etc.Information About Ice WedgesAn ice wedge is a crack in the ground formed by a narrow or thin piece of ice that measures anywhere from 3 to 4 meters wide and extends downwards into the ground up to 10 inches. During the winter months, the water in the ground freezes and expands. Once temperatures reach -17 degrees Celsius or colder, the ice that has already formed acts like a solid and contracts to form cracks in the surface known as ice wedges. As this process continues over many years, ice wedges can grow up to the size of a swimming pool. (from Wikipedia)
Organic Activity.
roots and diggingPlant roots break up rocks as they grow in search of water and nutrients. Animals that burrow in the ground expose rocks to the air where they can be further weathered.When animals die they produce acids which reacts with rocks causing them to break down or decay.
Weathering is the physical wearing down of rock or the earth, and erosion is the movement of the particles loosened by weathering. Weathering can be either mechanical or chemical. For chemical weathering to occur, a chemical reaction needs to occur in the ground, causing it to wear away. Mechanical weathering can include: freezing and thawing (water gets into ground and when it freezes it pushes the rock out), abrasion (force rubbing up against surface, such as water, which is why rocks in a river are so smooth), thermal weathering (rocks expand in very hot climates), salt wedges (rain with salt water in it falls into cracks between a rock and when the water dissolves, the salt is left behind pushing the rock outward), and animal activity (burrowing in the ground). Erosion would take place after one of these processes had, and it carries the weathered particles away by wind or water.
Mechanical weathering can be caused by wind, precipitation (rain, hail, etc), animals walking over it, basically anything that is a physical abrasion of the rock, not a chemical reaction.
they dig burrows in the ground
Organic Activity.
Freezing weather, dramatic changes in temperature, the roots of trees or plants searching for nutrients in the ground therefore breaking it apart, etc.
Weathering changes Earth's surface by carrying sediments or creating sediment in many ways. A few are when animals burrow in the ground, they can sometimes break rock. Also, the cracks in the ground, which are formed from tree roots, are filled with water, and freezes, then melts, weathering occurs. Also, when waves in the ocean or lakes, ponds, etc., crash down on rock, weathing happens.
moles i think
burrowing animals and ground-dwelling birds
Earth worms can cause weathering when they tunnel through the soil and moves pieces of rock around.This motion breaks some of the rocks into smaller pieces.
What is the hunting technique that burrowing owls use???!!!