Using the Scientific Method
what factor (variable) is changed when testing a hypothesis
independent variable
The study of reasoning
logic
the soil that has the most tightly packed particles
clay
Potassium's primary function for plants
promoting general health
the term for water below the soil's surface
groundwater
What is substance in the physical world
matter
A fallacy that assumes something caused whatever happened afterwards with no further evidence
post hoc
the type of soil that plants grow best in (pH scale)
neutral or slightly acidic
Soil that allows the most air and water in
sandy soil
the porous rock or gravel-soil mixture that holds water
factors that remain the same throughout an experiment (they are what results are compared to)
controlled variables
in an "if", "then" statement, what is the "then" part called
the consequent
what affects soil color the most
the amount of organic material
clayey soil
surface of the water underground
water table
the part of the scientific method that involves gathering data in an orderly way
observing
In the engineering process, what step comes afte researching and developing possible solutions to the problem
choosing a design and making a detailed plan
the ability of bedrock to inhibit water from passing through
impermeable
the compound of hydrogen and nitrogen that enters the soil through the action of certain bacteria and the decay of plants and animals
ammonia
the three basic substances that plants need to live are called
primary plant food elements
Double Jeopardy
Name the six steps of the scientific method
1. state the problem
2. gather information
3. formulate a hypothesis
4. test the hypothesis
5. record and analyze
6. state the conclusions
What term describes this sentence: "If a vehicle is an airplane, then it has wings."
hypothetical proposition
the soil layer that contains more mineral material and less organic material
subsoil
Double Jeopardy
The type of bacteria that returns nitrogen to the atmosphere by converting nitrogen from nitrates to atmospheric nitrogen
Dentrifying bacteria
the primary plant food element that is essential for cell division, growth, and plant maturation
phosphorus