Which of these is true about a pH meter? It is inexpensive to use.
It measures pH indirectly.
It does not require calibration.
It can be used in any acid-base titration.

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils