Traits are passed from parents to offspring by these.
What are genes?
100
Elements in this have the same number of electron "shells."
What is a period (row)?
100
A mass movement of animals of the same species, usually to find better weather or more food and water.
What is migration?
100
The amount of matter an object contains.
What is mass?
100
The question or educated guess that an experiment tests.
What is an hypothesis?
200
Offspring must inherit two of these alleles, one from each parent, such as tt, for the trait to be expressed (show).
What is recessive?
200
Positively charged particles found in the nucleus of an atom. The number of these particles determine what element the atom is.
What are protons?
200
A relationship in which both species benefit, such as a yucca moth and the yucca plant.
What is mutualism?
200
A type of matter in which two or more elements are chemically combined, such as water (H2O) or carbon dioxide (CO2).
What is a compound?
200
An instrument used by scientists to weigh or find the mass in an object.
What is a triple beam balance?
300
A species of chicken has alleles of black (B) or white (W). Neither of these genes is dominant. Mating between a black (BB) and a white (WW) chicken produces all grey (BW) offspring. If two of the grey offspring mate this percent of their offspring would be expected to have black feathers.
What is 25%?
300
These gases, found in Group 18, do not react with other elements.
What are the noble gases?
300
A relationship in which one species benefits while the other is harmed, such as a mosquito and a human being.
What is parasitism?
300
The ability of matter to rust (oxidize) is an example of this type of property.
What is a chemical property?
300
The factor that is changed in an experiment in order to study changes in the dependent variable.
What is an independent variable?
400
A child who inherits a blood type A allele from one parent and a blood type B allele from the other parent will have this blood type.
What is type AB?
400
These elements have only one electron in their outer (valence) electron shell, and are very reactive.
What is Group 1 (the alkali metals)?
400
The type of consumers that eat producers.
What are primary consumers?
400
A substance made of just one type of atom, such as gold (Au).
What is an element?
400
A subatomic particle having zero charge, found in the nucleus of an atom.
What is a neutron?
500
The process of nuclear division in cells which produces reproductive cells such as eggs and sperm.
What is meiosis?
500
There are approximately 120 of these, which make up every physical thing in the universe.
What are the elements?
500
The process by which organisms change over many generations.
What is evolution?
500
A mixture in which you can see the different individual types of matter, such as soil or chicken noodle soup.