It is called a stalaGMite. StalaCTites hang from the top. Memory key: the C in stalactite means Ceiling - and G in stalagmite means ground.
NARRA stands for National Aquatic Resources Research Agency.
* cone * pyramid
Whenever the force of friction of the particles, when they touch the floor, is greater than the force with which the water carries them. That depends on a lot of factors, including the speed of the flow, the size and material of the particles, their exact shape, how rough or smooth the floor is, and probably a few more details.
a cross
It doesn't! It takes the shape of whatever container you put it in. At least, it takes the shape of the floor of the container.
The shape of the wing and the forward speed generates lift and the aircraft rises.
How about a square floor tile
laying down sediment and plucking the valley floor.
its the symbol on the floor: a Z shape like this:zbut bigger
Gases will take on the shape of the container it is in. Carbon dioxide, for example, will take on the shape of the container, but if emptied from the container, the carbon dioxide, being heavier than air, will sink to the floor and then spread out across the floor.
triangle
In coned shape containers*