Air from the outside is:

a. warmed, dried and cleaned by the nose and mouth

b. cooled, dried and cleaned by the nose and mouth

c. cooled, moistened and cleaned by the nose and mouth

d. warmed, moistened and cleaned by the nose and mouth

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves