1a. What features of this model will help Armando answer the question? 1b. How could Armando use this model to test the idea that very steep hills lead to narrow, deep rivers?
1c. How could Armando use this model to test the idea that very small sand grains lead to narrow, deep rivers?
2. Armando thinks that it is the very steep hill that makes this river narrow and deep, but his classmate thinks it is the small size of the sand grains that the water flows through. What results from the model would be evidence that Armando’s idea is correct?

Match the following. biodegradable diabetes n hazardous w cancer ozone 1. the layer of the atmosphere that the ozone layer is part of the type of wastes that can be broken down by other organisms into a reusable form the type of solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive the process by which certain waste materials, such as plastic, glass, aluminum, and paper are prepared for reuse 5. the addictive drug found in tobacco a disease frequently developed by smokers and passive smokers a disease of the pancreas in which insulin is not produced in 7. the correct amounts so that glucose can be converted into energy or stored as fat formed in the atmosphere when chemicals, called volatile 8. organic compounds (vocs), and nitrogen dioxide (no2) are acted upon by sunlight when burned, it can cause an increase of co2, ozone, and sulfur dioxide in the atmosphere stratosphere fossil fuel recycle nicotine