what are caves? how are they formed? what are the organisms that can live there??

Question

please... i need it for my project!

Answer 1

Caves are usually formed by water eroding or dissolving the rock. Lava flowing can leave cave tunnels in the cold lava when the hot runs out. Caves can be shallow as when a rock fall near the bottom of a cliff leaves an overhanging roof. Almost anything that can live in the open can be found in these caves including birds, bears and large cats, and smaller mammels and rodents. Deeper caves are usually occupied by small animals, especially bats and things that can live off of dropping of bats and their prey. Because of the lack of sun, no plants grow although mushrooms grow, and in really deep caves the only animals, shrimp, worms, small fish, may be white as pigment serves no purpose.

Answer 2

Like your project about caves.

What are cavess? here are some definitions
1.A hole in the rock, usually large enough to be entered by a person. Esp. one that is mainly horizontal, requiring very few ladders or ropes to negotiate

2.a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea

3 just a rock tunnel (my definitions)

How are they formed?
Depending on what
kind a cave is, it
could have been
formed by water
erosion, chemical
processes, or even by
molten rock from a
volcano. There are
sea caves and other
caves hollowed out by erosion from water pressure,
and volcanic caves formed by empty lava tubes.
And then there's the other way for caves to be
made: acidic water trickling through cracks in rock
will gradually dissolve limestone and similar rocks.
Carbon dioxide from rotting plants in soil, and
sulfuric acid from underground gases or acid rain,
can combine with water to make an acidic solution
that will dissolve limestone. Gradually, this acidic
water will wear out
underground hollows.
When the
water finds an outlet
and drains away, it
leaves a cave.
A karst is an
area of limestone in
which erosion has
caused caves, sinkholes,
natural
bridges, fissures, and
underground streams
in the landscape.
(Sinkholes occur
when the roof of a
cave wears too thin and collapses.) Note that
canyons are made in a similar way as karst topography--
by erosion--but have deep sides of exposed
rock, carved out by rivers or streams.
You can demonstrate how erosion forms karsts,
using a container of moist, packed sand and a
squirt gun with water.


What animals live in them?
bears, wolves, bats, spiders, all kinda bugs
Bears, which are also mammals, hibernate in caves during the winter. Hibernation means they don’t leave the cave during the winter. The bears eat all through the summer so they are not hungry in the cave. The rocks in the cave store heat from the summer and in the winter the rocks slowly release the heat to keep the bear warm.

Many invertebrates live in caves. Some feed out of the cave and some feed in the cave. Grasshoppers and crickets feed out of the cave but dung-beetles eat in the cave. Flesh eating beetles eat the flesh of dead bats.

Caves that have water will usually have fish in them. The fish found it was easier to live in the cave because there are no badgers, bears, and other big fish to prey on them. They stay in the dark parts of the streams. Some fish in caves are blind.

Two types of birds that live in caves are barn owls and swiftlets. The swiftlets build their nests out of saliva. The barn owl leaves the cave to find food. Then it flys back to the dark part of the cave.

Bats, which are mammals, are very popular in caves. Some bats that live in caves are long-eared bats, big brown bats, gray bats, pipistrelle bats, and little brown bats. Bats are blind and find there way around by making noises through their throats and listening to the echo. Bats eat insects in the cave and out of the cave. Bats hang up side down to sleep.

Answer 3

Caves are natural cavities formed by chemical dissolution of calcium carbonate due to carbonic acid in water flowing through fractures in carbonates. The technical term is karsting and the terrain produced is called Karst Topography when it is done as a large scale process. I have seen colorless crickets in caves, and it is possible more varied lifeforms (e.g. bacteria, etc.) can exist if geothermal energy is available.

Answer 4

some caves are formed by erosion. water running through rock, other caves can me formed by movement or volcanic processes,.
holes are left when something moves or lava leaves carving its way through. providing it does not cool first

for research you have to do same work, check these words and phrases

Potholing
Stalactites
stalagmites
Cheddar gorge
ice caves
glaciation

cross reference with caves and your searches should give you some good results

Answer 5

Caves are formed by water moving through them over years and years.

http://en.wikipedia.org/wiki/Caves

http://www.pbs.org/wgbh/nova/caves/form.html

http://www.nmu.edu/biology/Jill/EnviroPhys%20Web/Caves/index.htm

note: These were really not difficult to find.. I just Googled them.