How do geologists study direct evidence of earth’s interior? 1. by collecting core rock samples 2. by measuring seismic wave activity 3. by analyzing how living things survive 4. by recording changes in climate patterns

1. by collecting core rock samples

Explanation:

Geologist obtain direct information about the interior of the earth by carrying out core rock sampling.

The rocks contained in the core used gives a better view as to the nature of the rock found at a particular depth in the earth. Core rock sampling involves the use of a drilling machine that has been built and designed for that purpose. As the drill goes through the earth, a core barrel helps collect intact samples of rock layers when the bits penetrates.

There is limit to which core rock sampling can be used to investigate the earth's interior due to the temperature and pressure in the interior. High temperature and pressure easily damages drill bits.

Other methods used to sample the interior of the earth are indirect. Such example is the use of seismic waves.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.