Question

1. a nonrenewable energy source forms:

a. quickly
b. over millions of years
c. overnight
d. in a factory

1. burning fossil fuels releases:

a. oxygen
b. nitrogen

Explanation:

• Question 6: Non - renewable energy sources, such as fossil fuels (coal, oil, natural gas), are formed from the remains of plants and animals. These organic materials are subjected to heat and pressure over millions of years in the Earth's crust.
• Question 7: When fossil fuels are burned, the chemical reaction (combustion) between the carbon - containing fossil fuel and oxygen (from the air) occurs. The general equation for the combustion of a hydrocarbon (a common component of fossil fuels) is \(C_xH_y+(x + \frac{y}{4})O_2

ightarrow xCO_2+\frac{y}{2}H_2O\). So, burning fossil fuels does not release oxygen or nitrogen as the main products. The main products are carbon dioxide and water (and some other pollutants in the case of impure fossil fuels).

Answer:

1. B. Over millions of years
2. (The options provided are incorrect. Burning fossil fuels mainly releases carbon dioxide and water. But if we assume it's a simple multiple - choice with wrong options, and if we consider the process of elimination: a. Oxygen is consumed in burning fossil fuels, not released. b. Nitrogen is not the main product of burning fossil fuels. But if we have to choose from the given options, there is no correct answer. However, if it's a misprint and the intended option was carbon - related, but based on the given options, there is an error in the question's options for question 7)