Select the best answer. Which statement is true about all convection currents?(1 point)
Responses
It is made possible by heat and pressure.
It is made possible by heat and pressure.
It results to formation of valleys and hills.
It results to formation of valleys and hills.
It causes earthquakes.
It causes earthquakes.
It happen in all layers of the Earth.
It happen in all layers of the Earth.
What is physical weathering? (1 point)
Responses
the breaking of rock into smaller pieces from nonchemical processes
the breaking of rock into smaller pieces from nonchemical processes
the movement of rock from one place to another
the movement of rock from one place to another
the building up of rock that has been brought from other places
the building up of rock that has been brought from other places
the transformation of rocks into some other type of material
the breaking of rock into smaller pieces from nonchemical processes
How can plants cause weathering? (1 point)
Responses
Plants attract animals, and animals can burrow into rocks.
Plants attract animals, and animals can burrow into rocks.
Chemical reactions in plants change rocks and break them into smaller pieces.
Chemical reactions in plants change rocks and break them into smaller pieces.
Sprouting seeds and growing roots can cause rocks to break.
Sprouting seeds and growing roots can cause rocks to break.
Plants need water, and water can weather rocks.
Sprouting seeds and growing roots can cause rocks to break.
Which action can help slow down the process of chemical weathering?(1 point)
Responses
removing iron oxide to avoid breaking down rocks
removing iron oxide to avoid breaking down rocks
using less water in industrial areas
using less water in industrial areas
burning less fossil fuel
burning less fossil fuel
removing clay to avoid weakening rocks
removing clay to avoid weakening rocks
Which is least affected by chemical weathering?(1 point)
Responses
a pile of tiles made of feldspar
a pile of tiles made of feldspar
a chair made of plastic
a chair made of plastic
a bridge made of iron rods
a bridge made of iron rods
a statue made of marble
a chair made of plastic
How do igneous rocks form?(1 point)
Responses
from the cementing of sediments
from the cementing of sediments
from the evaporation of water
from the evaporation of water
from the cooling of magma
from the cooling of magma
from the modification of existing rock
from the modification of existing rock