Question

1. mark passes by a building every day on his way to school. he notices that the rock used to build the walls of the building is a different type than the rock used to build the steps. how could energy have played a role in the different rock types forming?

a energy from different sources leads to different types of rock. energy inside earth melts rock into liquid rock, but energy from the sun causes rock to weather into small pieces of rock.

b energy caused one rock type to form, but not the other. rock that forms because of energy is a different type of rock than rock that forms without energy.

c energy changes rock in different ways, depending on the starting rock type. energy changes igneous rock into liquid rock and changes sedimentary rock into small pieces of rock.

d energy changes rock on different continents in different ways. each continent on earth has different rock that might form liquid rock or small rock pieces when exposed to energy

Explanation:

• Option a: Energy from different sources (internal - Earth's heat for igneous rocks; external - solar energy for weathering of rocks to form sediments which can make sedimentary rocks) leads to different rock types. Igneous rocks form from molten rock (due to Earth's internal energy), and sedimentary rocks often start with weathered rock pieces (weathering can be caused by solar - powered processes like temperature changes, water flow which is driven by solar energy for evaporation and precipitation cycle).
• Option b: All rocks form because of energy. Igneous from Earth's internal heat (energy), sedimentary from solar - powered weathering and lithification (which involves compaction and cementation, also energy - driven processes like pressure from overlying sediments which is related to gravitational energy but the initial weathering is solar - related in many cases), metamorphic from heat and pressure (Earth's internal energy). So this option is incorrect as it implies some rocks form without energy.
• Option c: Energy changes igneous rock into liquid rock (but that's just remelting which is a limited process in the rock cycle context compared to the overall role of energy). Also, sedimentary rock is formed from sediments (which are often weathered pieces from other rocks, and the lithification of sediments to sedimentary rock is an energy - driven process like compaction due to pressure (gravitational energy component) and cementation (chemical processes which can involve energy). But the description is too narrow and not the best explanation for the overall difference in rock types based on energy sources.
• Option d: The continent is not the key factor. The rock cycle processes (which are energy - driven) like weathering (solar - related), melting (Earth's internal energy) etc. are what lead to different rock types, not the continent.

Answer:

A. Energy from different sources leads to different types of rock. Energy inside Earth melts rock into liquid rock, but energy from the sun causes rock to weather into small pieces of rock.