classical conditioning
As an object approaches the Earth's surface, what will its acceleration be?
The velocity increases as it approaches the earth.
The volume of a body and the surface area arerelated but not in a direct way. For a given volume, the smallest surface area of an object is seen then the object is a sphere. As the shape flattens from a sphere, so the surface area becomes larger. When the object approaches an infinitely small thickness, the surface area approaches and infinite size.
They spawn in amongst the plant life at the surface of their pond/aquarium etc.
If you look at the surface of the water in an aquarium from the side of the aquarium with your eyes just below the level of the water, it will look like a mirror, and you won't be able to see anything above the surface. That's also true of a glass of water, but you can see the effect much more clearly with a container as large as an aquarium. Just make sure nobody jumps around or bumps into the aquarium or the table it is on because those vibrations will result in small waves in the water's surface and it won't look as good.
In the crust and upper mantle
Worms are not suitable for aquarium soil, consider how worms come to the surface when it is wet, they actually are preventing themselves from drowning. So earthworms will not work, not to mention they eat rotting and decomposing matter, which, for the most part, the aquarium soil is lacking.
laws of reflection
Going up to the surface for air
ultraviolet waves
laws of reflection
This is the coma, the portion of the comet that sublimates from the surface as it approaches the sun.