Constructive forces
build new land
tear down land
are not beneficial
destroy the earth's crust

the hawaiian islands were formed by what?
erosion
folding
faulting
volcanoes
--
a dome mountain forms when
the earth's crust is folded
blocks of rock crack
crustal plates move away from each other
magma pushes the earth's crust upward

choose all the answers that apply.
which of the following landforms are created by erosion?
sandbar
island
sand dune
beach
delta

a delta forms when
a volcano erupt underwater
eroded sediment is deposited at a river mouth
ocean waves carry away sand and rock pieces
blocks of broken rock are lifted over one another

what happens at subduction zones?
sediment is deposited by ocean waves
new land is formed from eroded soil
an oceanic plate sinks below a continental plate
two crustal plates move away from one another

which of the following statements is true?
mountains form when two continental plates move away from each other.
new oceanic crust is formed by magma filling spaces at mid-ocean ridges.
a loess is an area of nutrient-poor soil caused by erosion.
"hot spots" are locations where the earth's crust is very thick.

1- Option A

2- Option D

3- Option D

4- Option D

5- Option B

6- Option C

7- Option B

Explanation:

Constructive forces are the forces that add new landmass on earth. They are typically formed by events such as volcanic eruptions, sediment deposition, and distortion in the crust.

The Hawaiian volcanic islands were formed due to the subduction of the Pacific plate under the NorthAmerican plate.

A dome generally forms when the magma rises up towards the surface. This hot magma lifts the land area, and subsequently with time, the magma cools and solidifies before eruption, giving rise to the formation of domes.

Beaches are formed due to the continuous erosion of the coastal rocks by the sea waves. Waves also carry sediments from the oceans to the coastal beach but it mainly erodes the rocks and sediment particles that are present on the beach area.

When sediment particles are carried by the rivers and streams and are deposited at the mouth of the river, then a delta is formed.

When an oceanic plate collides with a continental plate, then the denser oceanic plate gets subducted beneath the continental plate and forms a region of subduction where at great depth partial melting of the subducting plate takes place.

Along the mid-oceanic ridge, new crusts are added because the hot magma comes out to the surface and solidifies. This are rocks that are basaltic in nature.

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