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