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As space is infinite, no one could possibly answer that. We have difficulty seeing objects as large as Jupiter once we go outside our solar system, let alone another galaxy - we have no chance of seeing pebbles. So, if we take a purely mathematical guess and say there is a fairly equal chance that there will be a fairly even graduation from the smallest to the largest, and we take what we consider is the largest item in space (200 million light-years wide giant green jelly fish - actaully its a Lyman alpha blob - and not really a single object but a gas cloud) there has to be more thing between a pebble (say 100g) and 2E8 Light Years than there are between a single molecule of dust and a pebble.
Most types of sponges have asymmetrical bodies. There are around 10 thousand different types of sponges found in bodies of water all over the world.
true
Both derivatives and integrals - two of the most important concepts in calculus - are defined in terms of limits; specifically, what happens when something gets smaller and smaller.
Simply that there were some observations that were very much smaller or very much larger than most of the rest.
Meteoroids are smaller than asteroids; most are smaller than the size of a pebble.
Some are, but most are much smaller. Most meteors range in size from sand grains to pebbles.
Most rocks and pebbles do not glow.
As space is infinite, no one could possibly answer that. We have difficulty seeing objects as large as Jupiter once we go outside our solar system, let alone another galaxy - we have no chance of seeing pebbles. So, if we take a purely mathematical guess and say there is a fairly equal chance that there will be a fairly even graduation from the smallest to the largest, and we take what we consider is the largest item in space (200 million light-years wide giant green jelly fish - actaully its a Lyman alpha blob - and not really a single object but a gas cloud) there has to be more thing between a pebble (say 100g) and 2E8 Light Years than there are between a single molecule of dust and a pebble.
Boulders that have been carried by a glacier have a couple names, but most commonly they are referred to as glacial boulders or erratics. If you're interested in learning more about glacial boulders, the Iowa Department of Natural Resources has a pretty good article about them; as Iowa and most of the American Midwest were covered by glaciers during the last Ice Age, glacial boulders are fairly common there. http://www.igsb.uiowa.edu/browse/boulders/boulders.htm
pebbles,
They had various origins
Pebbles are most often found near rivers and lakes. These stones are usually tumbled in fresh water until their edges are smooth.
You can use it in most caves to move the big grey boulders out of your way.
round
It is most likely just algae
Yes most pebbles will be denser than honey.