earth science 11

Question 1

what is humus

Answer 1

is a dark colored material that is important for the growth for plants. some of the chemicals

Question 2

weathering

Answer 2

The breaking down of rocks and other materials on the earth surface is called weathering

Question 3

mechanical weathering

Answer 3

weathering that dose not invlove changes in the chemical makeup of rocks

Question 4

oxidation

Answer 4

the process in which oxygen chemically combines with another substance

Question 5

stable rock

Answer 5

a rock composed of minerals that resi`st chemicals weathering

Question 6

bedrock

Answer 6

the layer of rock beneath the soil

Question 7

topsoil

Answer 7

the soil in the A horizon or uppermost layer of mature soil

Question 8

transported soil

Answer 8

soil that is moved away from its place of origin

Question 9

subsoil

Answer 9

the soil in the B horizon or middle layer of soil

Question 10

soil profile

Answer 10

a cross section of soil horizon

Question 11

root pry

Answer 11

the breaking apart of rocks caused by the growth of plants root

Question 12

rock

Answer 12

a hard substance composed of one or more minerals or minerallike substance

Question 13

residual soil

Answer 13

soil that memains on top of the rock from which it was formed

Question 14

pore space

Answer 14

a space between soil particals

Question 15

organic rock

Answer 15

a sedimentary rock that is formed either directly or indirectly from materials that was once alive

Question 16

load

Answer 16

the amount of sediment carried by stream

Question 17

leaching

Answer 17

the process in which water washes minerals from the topsoil to the subsoil

Question 18

intrusive rock

Answer 18

an igneous rock formed by magma

Question 19

igneous

Answer 19

formed from molten rock

Question 20

erosion

Answer 20

the process bu which the products of weathering are moved from one place to another

Question 21

depostion

Answer 21

the process by which sediments are laid down in new location