1
What is tightly packed matter
density
What is the amount of matter in an object
mass
What is the study of soil
pedology
What measures the pull of gravity?
weight
What is the amount of space that matter takes up?
volume
What is an organized way for a scientist together and pursue scientific knowledge?
The Scientific Method
What is a sensible explanation to a scientific problem?
Hypothesis
What is soil material primarily derived from living organisms?
Organic material
What is soil material primarily derived from nonliving matter?
Mineral material
In an If/then statement, what is the "then" part called?
Consequent
Which primary plant food element is essential for cell division, growth, and plant maturation?
Phosphorus
In what type of soil do plants grow best?
Neutral or slightly acidic
Is a soil sample with a pH 9 acidic or basic?
basic
What is the most basic unit of matter?
an atom
What is the reusing of old material?
recycling
What is the lower layer of soil that is mostly mineral?
bedrock
What soil contains a range of sand, salt, clay, and humus mixtures?
What soil is coarse, gritty, and has easily seen particles?
sand
What food element makes "firm up" properly?
phospherous
Which food element's main function is to contribute to a plant's general health and improve disease resistance?
potassium
Which food element stimulates the growth of stems and leaves in plants?
Nitrogen
What group of chemicals contains the element phosphorus bonded to four oxygen atoms?
Phosphate
What is the upper surface of ground water?
The water table
What soil bacteria converts nitrogen into ammonia, nitrates, and other nitrogen compounds?
Nitrogen-fixing bacteria
Which bacteria returns nitrogen into the atmosphere by converting nitrogen from nitrates into atmospheric nitrogen?
denitrifying bacteria