An attempt to preserve or protect the environment from harmful changes is known as . *

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?