Weathering
Soil
Rocks
Extra
Bonus
100
What is the definition of weathering ?
Weathering is the breaking down (wearing) of rocks on the earth’s surface
100
How is soil formed ?
Soil is the thin layer of material covering the earth's surface and is formed from the weathering of rocks.
100
What is the last layer of soil ?
Bedrock
100
What is Loam?
a fertile soil of clay and sand containing humus or a soil with roughly equal proportions of sand, silt, and clay
100
How do plants help stop erosion ?
Plants provide protective cover on the land and prevent soil erosion. Plants slow down water as it flows over the land and this allows much of the rain to soak into the ground. Plant roots hold the soil in position and prevent it from being washed away.
200
How many types of weathering are there and what are they ?
Two types Mechanical and Chemical
200
What is the importance of soil organisms ?
Soil organisms, which range in size from microscopic cells that digest decaying organic material to small mammals that live primarily on other soil organisms, play an important role in maintaining fertility, structure, drainage, and aeration of soil.
200
What are rocks made up of?
The Earth is covered in a layer of solid rock called the crust. Rocks are either SEDIMENTARY , IGNEOUS, or METAMORPHIC. Almost all rocks made of minerals, but different rocks contain different mixtures of minerals. Granite, for example, consists of quartz, feldspar, and mica.
200
Why is loam best for growing crops ?
Loam soils are best for plant growth because sand, silt, and clay together provide desirable characteristics. First, the different-sized particles leave spaces in the soil for air and water to flow and roots to penetrate. The roots feed on the minerals in the suspended water.
200
What is a common soil organism we may find on a rainy day?
Worm
300
What are the 6 types of mechanical weathering?
Exfoliation, Abrasion, Gravity , Ice wedging , Organic, and Tempature
300
What is Humas ?
Humus usually refers to the natural decay of material such as leaves in the soil's top layer. Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up. This material is called leaf litter.
300
What are the three main types of rock ?
Igneous, sedimentary , and Metamorphic
300
What is "No till Farming "?
No-till farming (also called zero tillage or direct drilling) is a way of growing crops or pasture from year to year without disturbing the soil through tillage.
300
What is the youngest layer of soil ?
Horizon B or subsoil?
400
What are the different soil horizons and what are they made up of ?
Soil Horizons (layers): Soil is made up of distinct horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to underlying rocky layers ( subsoil, regolith and bedrock).
400
What is rock permeability ?
Permeability is a measure of the ability of a porous material (often, a rock or an unconsolidated material) to allow fluids to pass through it.
400
What is Contour Farming?
Contour farming is growing crops "on the level" across or perpendicular to a slope rather than up and down the slope. The rows running across the slope are designed to be as level as possible to facilitate tillage and planting operations on the contour.
400
What is the first layer of soil called ?
Bedrock
500
Factors that control how fast weathering occurs
The amount of water in the air and the temperature of an area are both part of an area's climate. Moisture speeds up chemical weathering. Weathering occurs fastest in hot, wet climates. It occurs very slowly in hot, dry climates.
500
Which horizon forms last and what is Leaching?
Horizon B and leaching refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. Soil structure, crop planting, type and application rates of fertilizers, and other factors are taken into account to avoid excessive nutrient loss.
500
what are the smallest and biggest rock particles ?
Clay is the smallest and sand is the biggest
500
What is erosion ?
e process of eroding or being eroded by wind, water, or other natural agents.
500
What is the Second to last layer of soil to form ?
What is topsoil/Horizon A
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