Nature of Science
This now-disproven theory suggested that living organisms could arise directly and spontaneously from non-living matter, like maggots appearing out of raw meat.
What is spontaneous generation
This is the process by which an organism keeps its internal body environment stable and balanced.
What is homeostasis
These occupy the outermost energy level of an atom and decide how it will bond with other elements.
What are valence electrons
Water is described as this kind of molecule because oxygen pulls shared electrons much more strongly than hydrogen, creating positive and negative poles.
What is polar
This class of biomolecules includes sugars and starches and provides cells with a quick source of energy.
What are carbohydrates
This is a testable, educated explanation for a scientific observation, often written in an "If..., then..." format.
What is a hypothesis
This is a process the body uses to reverse a change and bring the body back to its normal, balanced state.
What is negative feedback (or negative feedback loop)
This type of strong chemical bond is formed when two atoms share pairs of valence electrons.
What is a covalent bond
This weak attraction forms between the hydrogen of one atom and the oxygen of a neighboring water molecule.
What is a hydrogen bond
These monomers join together to form proteins.
What are amino acids
This is the specific variable in an experiment that the researcher intentionally changes or manipulates.
What is an independent variable
This specific term describes how warm-blooded animals keep their body temperature at a safe level.
What is thermoregulation
This type of bond forms when electrons are completely transferred from one atom to another, creating oppositely charged ions.
What is an ionic bond
This term describes the way water molecules to stick to each other, giving water a remarkably high surface tension.
What is cohesion
Fats, oils, and phospholipids all belong to this class of biomolecules.
What are lipids
This is the distinct neck shape of the flask Louis Pasteur used to trap dust and microbes.
What is swan-neck (or s-shaped)
This type of feedback loop amplifies or speeds up a process to push it to completion, such as blood clotting.
What is positive feedback (or positive feedback loop)
In a skeletal structure, these two atoms are completely hidden from the drawing if they are both bonded to each other.
What are carbon and hydrogen
liquid solution with a high concentration of H+ ions and a pH value anywhere below 7 is classified as this.
What is an acid
Enzymes belong to this class of biomolecules, which are made from chains of amino acids.
What are proteins
This baseline group in an experiment does not receive the experimental treatment and is used for comparison.
What is the control group
This hormone is released by the pancreas to lower high blood sugar levels after eating.
What is insulin
In a chemical skeletal structure (or line drawing), every corner and end of a line is understood to represent this element.
What is carbon
This type of polarity would be expected when a molecule contains many carbon-hydrogen bonds and very few oxygen atoms. They share electrons evenly.
What is non-polar
Nucleotides are the individual monomers that link together with covalent bonds to form this genetic information storing macromolecule category.