A student has 4 cups. All are equal in size and in shape. Each cup is made from a different material. The student pours an equal volume of water into each cup. The water is at room temperature (21°C). The student puts the four cups for exactly two minutes on a hot plate set at 60°C. At the end of two minutes, the student inserts a thermometer into each of the four cups and measures the water temperature in each cup. The student records the measurements in a table. By looking at the table, the student concludes that the material that makes the best heat conductor out of the four materials tested is –

The heated ones

Explanation:

Heat moves fast, but cold moves very slowly or not at all.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds