Soil

Question 1

Regolith

Answer 1

layer of weathered rock fragments that covers most of the earths surface

Question 2

Bedrock

Answer 2

solid, i weathered rock that lies beneath the regolith

Question 3

2 types of bedrock

Answer 3

solid and broken

Question 4

what is soil named after?

Answer 4

weathered rock particles, organic material (humus), and air

Question 5

humus

Answer 5

plant or animal material; dark colored (from plants mostly)

Question 6

clay

Answer 6

smallest particle size; weathered from rocks containing feldspar or aluminum

Question 7

Silt

Answer 7

medium particle size; often found around river banks, river beds or lake beds

Question 8

sand

Answer 8

largest particle size; weathered from rocks containing quartz

Question 9

soil profile

Answer 9

cross section in which layers (aka horizons) of soil and bedrock can be seen

Question 10

O horizon

Answer 10

mostly organic matter such as decomposing leaves

Question 11

A horizon

Answer 11

consists of topsoil (mostly sand and some clay); usually includes leached soil deficient in humus and some minerals

Question 12

B horizon

Answer 12

subsoil reddish brown in color made mostly of clay; rich in minerals and nutrients

Question 13

C horizon

Answer 13

deepest layer; consists of broken and solid unweathered rock

Question 14

humid tropical climate

Answer 14

thick o horizon- laterite (acidic soil)

Question 15

pedalfur

Answer 15

found in areas of e. mississippi river that recieve more than 65 cm of rain a year; mostly clay, quartz and iron; acidic

Question 16

pedocal

Answer 16

found in areas of the w. mississippi river in areas receiving less than 65cm of rain a year; contains Ca, less acidic, very fertile

Question 17

soil in a mountain or hill is usually…

Answer 17

thin and poor quality because rainwater runs down and washes it away

Question 18

ncs main type of soil is

Answer 18

cecil

Question 19

cecil is above…. and has a…

Answer 19

granite rock; thick red subsoil