chapter 4
how do viruses enter the body?
viruses enter the body through the nose mouth skin etc.
name the ph range and things used to identify ph of a substance.
0 to 14 and are found by litmus and universal indicator.
give an example of an useful echo.
used in sonar in boats.
are visuses alive?
they are somewhat half alive as they cannot move and replicate without a human cell
what is carbon used for?
to purify water.
vibrations from sound can break______
objects.
what is the layer that protects the cell called?
the protein coat.
what is chlorine and nickel used for : give examples
chlorine: in pools
nickel: in glasses as it can come back to its original shape.
are there vibrations in a vacuum? why?
no, due to no air in a vacuum.
define fertile.
an animal that is healthy, fit and can reproduce.
what is an useful thing of copper?
it is easily bendable into wires and is very conductive.
what is the speed of sound?
343m/s
what is the official name of the virus covid-19 and influenza.
SARS-CoV-2 and H3N2
name 7 properties of metals
strong, shiny, malleable, ductile, sonorous, conductive, magnetic.
how are mountains formed? where did the largest volcano erupt?(on earth)
this is when two tectonic plates crash and one goes over the other creating a mountain.
ethopia.