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Earth Science
Explore questions in the Earth Science category that you can ask Spark.E!
- Rock formed from magma or volcanic lava is called _____.
- Rock that forms when layers of sediment and organic material harden is called _____.
- A hard, natural substance made of one or more minerals that contain organic materials is called:
- The center of the earth is called the _____.
- The thin outer layer of the earth is called the _____.
- The characteristic of a mineral to break along smooth, straight lines or into flat sheets is called ______.
- A substance made of things that were never alive is _____.
- An inorganic substance found naturally in the earth is called _____.
- Most of the earth's mass is in the _____.
- The color of the mark made when a mineral sample is rubbed on a harder surface is called the _____.
- When studying soils we are concerned with Soil ____, ____, ____ & ____ (4)
- Soil Structure relates to the ____ or ____ of soil particles into aggregates or peons
- Methods of Determining Soil Classes- USDA Lab method
- The greater the rainfall and humidity the _____ the weathering
- At first tillage improves ____ ___ but over time tillage destroys structure
- Soil _____ & _____ both determine the supply of H20, Air, Nutrients & Heat
- How many continents are on earth?
- According to Hillel, most crop plants (corn, soybean, wheat etc.) are classified as:
- Natural (i.e., unpolluted) rainwater has a pH<7 due to the fact that it contains:
- What happens to density, pressure and temperature as you go deeper into the earth?