Coal Is a Solid Fossil Fuel Formed When Plant Material

question 8

Multiple Choice

Coal is a solid fossil fuel formed when plant material is buried in _______________ conditions and subjected to _________________ over a long time.

• A)oxygen-rich; high heat and pressure
• B)oxygen-poor; high heat and pressure
• C)oxygen-poor; low heat and pressure
• D)oxygen-rich; low heat and pressure

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Definitions:

Simplify

To simplify in mathematics means to alter an expression to a more concise, equivalent form, making it easier to work with or understand.

Expression

A combination of symbols, numbers, and operators (+, -, *, /) that together define a mathematical quantity or relationship.

Simplify

The process of altering an expression to make it easier to understand or work with, often by reducing it to its most basic form.

Expression

A mathematical phrase that can include numbers, variables, and operation symbols but doesn’t have an equal sign.