yes they ca is ur ansswerrr
indicate valleys, hills, steepness and gentleness of slopes.
explanation:
contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.
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c-14 is carbon-14, or radiocarbon. it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.