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Soil test
Soil is more than Dirt
| Question | Answer |
|---|---|
| Which of the following describes a soil's texture? | A)red B) dry C) silty loam D) wet C correct answer |
| The texture, or particle size, of soil determines | How much air and water the soil can hold. or Permeability , porosity |
| What is the breakdown of rock into smaller pieces by physical means called? | Mechanical/physical weathering |
| Which of the following is a chemical weathering agent? | A)growing tree roots B) ice wedging C) burrowing animals D) Oxidation/Rust D correct answer |
| Explain how every living thing on land depends on soil. | Plants depend directly on soil to live and grow. Animals depend on plants to live and grow, or on other animals that depend on plants. |
| Compare and contrast topsoil and subsoil. | Topsoil makes up the uppermost soil layer contains humus, which colors the soil a dark brown, the best soil in which to grow plants. Subsoil makes up the soil layer below topsoil. It is made mostly of clay and other minerals and leaching occurs. |
| Humus makes soil ____________________, or rich in nutrients that plants need to grow. | Fertile/Fertility |
| The type of soil called loam is made up of | Nearly equal amounts of silt, sand, and clay. |
| In which soil layer would you find loam that is rich in humus | A horizon |
| Geologists infer from the rounded, eroded shapes of the Appalachian Mountains that | Weathering & eroding for millions of years. |
| The practice of plowing fields along the curves of a slope is called | Contour plowing. |
| What term describes the management/saving of soil to prevent its destruction? | Soil conservation |
| What can cause the loss of soil that is not protected by plant cover? | Erosion by water or wind |
| Soil is a valuable resource because it | a. is important to all living things on land. b. contains sand and gravel. c. is rich in decomposers. d. has all three soil horizons. A correct answer |
| Soil formation begins with the weathering of | Rock =bedrock. |
| A hot and wet climate causes weathering to take place | Rapidly/Fast/Quick |
| A rock containing iron becomes soft and crumbly and reddish-brown in color. It probably has been chemically weathered by | Oxygen/Oxidation |
| What kind of weathering causes the mineral composition of rocks to change? | Chemical weathering |
| In which horizon of a soil profile is the parent material usually found? | Horizon C |
| How does(Animal eating grass) grazing affect soil? | Overgrazing can leave soil vulnerable to wind and water erosion. |
| Each layer of a soil profile is called a __________. | Horizon |
| __________ is a method in which level-topped areas (steps) are built into steep-sided hills. | Terracing |
| A soil's composition (made up of) is dependent on weathering because __________. | It contributes sediment/ rock particles to the soil |
| Erosion is more common on __________. | a. level ground b. steep slopes c. on gently sloping hills d. in valleys B-steep slopes because of the incline |
| In which horizon of a soil profile does leaching normally occur? | horizon B |
| A human activity that contributes to soil erosion is __________. | a. farming b raising livestock(animals) c. construction d. all answers are correct D correct answer |
| Soil is a mixture of __________. | Mineral fragments, weathered rock , water, decayed organic matter, and oxygen(air) |
| Soil ________ is the arrangement of soil particles. | Structure |
| ____ __ ranges from 1 (acidic) to 14 (basic). A ___ of 7 is neutral. | pH of a soil / Soil pH |
| What is the practice of leaving old stalks to provide cover from the rain called? | Cover crop |
| Soil that remains above the bedrock from which it formed is called | Residual soil. |
| Which of the following could cause rich soils to lose their nutrients? | a. poor agricultural (farming) practice c. adding fertilizer b. lack of leaching d. adding humus A correct answer |
Created by:
alleyne
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