Standards review Week 28 March 16, 2015

SOIL– s6e5H 2. Soil texture is important for plant growth. Describe the texture of fertile soil? Coarse- containing large rock particles Fine- to close together to allow water to flow through. Parent material – having similar rock as the bedrock below Containing a mixture of sand, silt, clay and humus 1. What does humus provide to soil? Small rock particles Water carrying nutrients Decaying organic matter Large course rocks 4. Why is texture so important in determining how soil is able to absorb water? Tightly compact soil is better for planting gardens Fine particles do not allow plant roots to grow Large particles make for smooth texture and better soil Determines how much water can be absorbed 3. What are the four main components soil is made of? Humus, parent material, air and leaching, Rocks, air, water, and humus Sand, silt, clay and water Bedrock, clay, air and water

SOIL– s6e5d Soil texture is important for plant growth. Describe the texture of fertile soil? Coarse- containing large rock particles Fine- to close together to allow water to flow through. Parent material – having similar rock as the bedrock below Containing a mixture of sand, silt, clay and humus 1. What does humus provide to soil? Small rock particles Water carrying nutrients Decaying organic matter Large course rocks 4. Why is texture so important in determining how soil is able to absorb water? Tightly compact soil is better for planting gardens Fine particles do not allow plant roots to grow Large particles make for smooth texture and better soil Determines how much water can be absorbed 3. What are the four main components soil is made of? Humus, parent material, air and leaching, Rocks, air, water, and humus Sand, silt, clay and water Bedrock, clay, air and water

Soil– s6e5h 2. Which factor does not contribute directly to soil formation? wind rain Freezing water sun Which layer of the soil profile is also know as parent material? humus bedrock Weathered rock topsoil 3. What part of the soil consists of decaying organic matter? clay bedrock humus mineral layers 4. Which would have the least amount of nutrients? a. bedrock b. clay c. topsoil d. humus

Soil– s6e5h 2. Which factor does not contribute directly to soil formation? wind rain Freezing water sun Which layer of the soil profile is also know as parent material? humus bedrock weathered rock topsoil 3. What part of the soil consists of decaying organic matter? clay bedrock humus mineral layers 4. Which would have the least amount of nutrients? a. bedrock b. clay c. topsoil d. humus

Soil – s6e5h 2. Describe the layers of the soil profile to include how are nutrients carried from one layer to another? Write your answer and explain your thoughts. What type of resource is soil? Slowly renewable resource Quick renewable resource Nonrenewable resource Inexhaustible resource

Soil – s6e5h 2.Describe the layers of the soil profile to include how are nutrients carried from one layer to another? Write your answer and explain your thoughts. The top layer of the soil profile is called top soil. This is where decayed plants and animals decompose and turn into humus. Nutrients from humus are carried to the next layer called subsoil through a process called leaching. Beneath the subsoil is parent material which is mostly weathered rock that is like the last layer called bedrock. Bedrock is composed of solid rock. What type of resource is soil? Slowly renewable resource Quick renewable resource Nonrenewable resource Inexhaustible resource

Soil – s6e5h Soils vary throughout the world. Climate, elevation, plant growth; these are just some factors that influence weathering and soil formation. The tundra and the dessert are alike in some ways; different in others. Both the tundra and the dessert have little available water for plant growth. Imagine you are collecting soil samples from a dessert location and the tundra. What might these soil samples have in common? A very low amount of humus Lots of decomposing tree roots Very small, fine-textured soil particles A large amount of sand and very little silt or clay

Soil – s6e5h Soils vary throughout the world. Climate, elevation, plant growth; these are just some factors that influence weathering and soil formation. The tundra and the dessert are alike in some ways; different in others. Both the tundra and the dessert have little available water for plant growth. Imagine you are collecting soil samples from a dessert location and the tundra. What might these soil samples have in common? A very low amount of humus Lots of decomposing tree roots Very small, fine-textured soil particles A large amount of sand and very little silt or clay

Impact of human activity – s6e6.i Fossil fuels also cause pollution when they are burned. Burning fossil fuels puts harmful gases, such as carbon dioxide, into the air. Too much carbon dioxide in the atmosphere may contribute to global warming, which is an increase in the Earth’s average temperature. 3. What is the main gas responsible for global warming? Nitrogen Oxygen Carbon dioxide Sodium choline 4. What type of damage can our fossil fuels cause? Decrease in severe weather patterns Increase in earth’s temperature Increase in sea level Increase in the size of the ozone layer

Impact of human activity – s6e6.i Fossil fuels also cause pollution when they are burned. Burning fossil fuels puts harmful gases, such as carbon dioxide, into the air. Too much carbon dioxide in the atmosphere may contribute to global warming, which is an increase in the Earth’s average temperature. 3. What is the main gas responsible for global warming? Nitrogen Oxygen Carbon dioxide Sodium choline 4. What type of damage is NOT a cause of fossil fuels? Decrease in severe weather patterns Increase in earth’s temperature Increase in sea level Increase in the size of the ozone layer