Cans aren't entirely made of tin because of rusting. When scratched(which happens quite frequently to cans) the tin is in more danger of rusting. This is why the cans are coated in a layer of tin rather than the whole can is made of it.
Compressions are regions of high pressure due to particles being close together
rarefactions are regions of low pressure due to particles being spread further apart
Longitudinal waves are often demonstrated by pushing and pulling a stretched slinky spring
<span>Two characteristics used to classify igneous rocks are texture and
</span>Mineral Grains
Density is the measure of a mass per unit volume of a material substance
density= Mass/volume
The unit of density is g/cm^3
