pH
what does pH measure?
alkalinity and acidity
what is the smallest particle of an element that displays the properties of the element?
atom
what subatomic particle has a negative charge?
electron
how animals store carbohydrates (made from glucose)
glycogen
Frozen water (ice) is _____ dense than liquid water.
less
The pH of an acidic substance is _______ than 7.
lower
what is the factor of the experiment being tested?
independent variables
what is the form of a single element that differ in the number of neutrons?
isotope
when molecules bond to one another and produce h2o
dehydration synthesis
This term refers to when water molecules bond to each other more strongly than to air
surface tension
The pH of a basic substance is _________ than 7
higher
what is the smallest unit of life?
the cell
what is an atom that differs in the number of protons and electrons?
ions
type of lipid that has all have a set of 4 linked carbon rings - side chains different
steriod
name a type of lipid
1. fat
2. lipids
3. phospholipids
what is an example of an acid?
vinegar
what helps an organisms maintain its natural internal balance?
homeostasis
what is the number of atoms in a defined spatial relationship?
molecules
what type of fat has at least one or more C-C bond is a double bond
unsaturated
what is the collection of unified insights about nature, the evidence of is an array of facts?
science
what is an example of a base?
soap
what is a generalization that explains many observation and has been tested and researchers have yet to find evidence that disproves it?
theory
where are valence electrons found?
in the outermost electron shell
name one characteristic of lipids
1. composed of carbon, hydrogen, and oxygen -- more hydrogen
2. hydrophobic
3. energy storage and insulation
can an element be broken down into smaller substances?
no