Soil

What does soil contain?

What does humus consist of?

Tags

NGSS.MS-LS2-3

What is the first layer of soil?

• Top soil

• Sub soil

• Bedrock

• Loam

What is the ideal pH for plants?

• 6-7.5

• 7.5-9

• 5-6.5

• 4-5.5

What is soil pH?

• A measure of the amount of organic matter in the soil; concentration of water ions (H2O+) in the soil solution

• A measure of the amount of water saturation in the soil; concentration of oxygen ions (O+) in the soil solution

• A measure of the amount of acidity or alkalinity of a soil; concentration of hydrogen ions (H+) in the soil solution

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

What are the 3 particles that make up mineral material

• sand, silt, clay

• silt, organisms, humus

• sand, humus, organisms

• clay, humus, sand

Definition of sand

• low nutrient capacity

• medium nutrient capacity

• high nutrient holding capacity

What are the three layers of soil

• humus

• bedrock

• sub soil

• top soil

Why do plants need soil?

• shade, shelter, water, food

• photosynthesis & chlorophyll

• homes for plant roots and insects

• water, air, nutrients, anchorage

Tags

NGSS.MS-LS2-1

What is dirt

• clay particles

• misplaced soil

• soil

• micro crushed rock