Question

the models below show some information about surface features found on the moon and earth.
a student made a chart of constructive and destructive geologic processes represented in the model of impact of theia with earth which formed the moon and the two models of surface features on the moon and earth.

1. which table below shows an additional process that is correctly classified for either the moon or earth, and could be added to the table above?

(1)
(2)
(3)
(4)

1. which two geologic processes have provided information about earths formation and early history by altering or destroying most of the very early rock record on earth, while 4.2 billion year old craters on the moon still remain?

(1) plate tectonic activity and erosion of earths surfaces by water
(2) weathering of earths surface and accretion of vapor, dust, and molten rock
(3) lava flows from erupting volcanoes and frequent earthquakes
(4) radioactive decay of earths crust and decay of earths crustal minerals

Explanation:

Question 4

• Option (1): Weathering and moving sediment by a waterfall is a destructive process, not constructive. So this option is incorrect.
• Option (2): Upward flow of lava creating a mare ridge is a constructive process (building up landforms), not destructive. So this option is incorrect.
• Option (3): A delta forming from sediments transported by a river is a constructive process (building up a landform on Earth). This option is correct.
• Option (4): Lava flowing out of a volcano onto a planetary surface is a constructive process (building up land), not destructive. So this option is incorrect.

• Option (1): Plate - tectonic activity (recycling of rocks) and erosion of Earth’s surfaces by water (breaking down rocks) have altered or destroyed most of the very early rock record on Earth. The Moon, with less of these processes (no plate tectonics in the same sense and no liquid - water erosion), still has old craters. This option is correct.
• Option (2): Accretion of vapor, dust, and molten rock is a process of Earth’s formation, not a process that destroys the early rock record. So this option is incorrect.
• Option (3): Lava flows from erupting volcanoes can be a constructive process (building up rocks), and earthquakes (while they can break rocks) are not the main processes that have destroyed the early rock record compared to plate tectonics and water - erosion. So this option is incorrect.
• Option (4): Radioactive decay is a process that occurs within rocks (e.g., for dating), and decay of crustal minerals is a less significant process in destroying the early rock record compared to plate tectonics and water - erosion. So this option is incorrect.

Answer:

(3) A delta formed from sediments transported by a river on Earth.

Question 5