Chapter 3 - Earth

Question 1

Soil substance composed of decayed organisms’ particles:

Answer 1

Humus

Question 2

Mineral group consisting of compounds made with elements fluorine, chlorine, bromine, or iodine:

Answer 2

Halides

Question 3

Substance that is found naturally in the earth and has a crystalline structure:

Answer 3

Mineral

Question 4

Scale that rates the hardness of minerals by how easily they are scratched:

Answer 4

Mohs scale

Question 5

Middle layer of the Earth

Answer 5

Mantle

Question 6

Primary plant food element that is essential for cell division and growth and promotes plant maturation:

Answer 6

Phosphorus

Question 7

Describes minerals that continue to glow for a while after being exposed to ultraviolet light and then placed in the dark:

Answer 7

Phosphorescent

Question 8

Layer of solid rock below the subsoil:

Answer 8

Bedrock

Question 9

Deposits of sand, mineral fragments, or organic materials usually left by wind or water:

Answer 9

Sediment

Question 10

group of minerals that contain the elements silicon and oxygen

Answer 10

silicates

Question 11

line of powder left on a piece of unglazed porcelain by a mineral

Answer 11

streak test

Question 12

water collected below the soils surface

Answer 12

groundwater

Question 13

earths outer layer of solid rock

Answer 13

crust

Question 14

groundwater collected in layers of either porous or a gravel-soil mixture

Answer 14

aquifer

Question 15

nourishing substance

Answer 15

nutrient

Question 16

soil bacteria that convert nitrogen into ammonia, nitrates, and other nitrogen compounds

Answer 16

nitrogen-fixing bacteria

Question 17

pH Value is 8

Answer 17

basic