What materials can be used to erase part of a document?
chemicals
eraser
sandpaper
all of the above

All of the above

Erasers are natural or synthetic substances that can be used to remove or alter the handwritten or printed material from the document. The natural materials which can be used for erasing includes the rubber, sandpaper , vinyl, plastic, or gum-like materials, whereas synthetic materials includes chemicals like acetone formulations.

hello there,

igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.