Fossils
what is a fossil
the preserved remains, traces, or impressions of ancient organisms from a past geological age.
what is a element
a pure substance made up of only one type of atom.
what is pangaea
a time where all the continents were once connected
what is adaptation
adaptations are a trait that help the chance of animals and plants to survive in a specific environment
what is a habitat
a place where a plant or animal live is called a habitat
what are the different types of fossils
body fossils, trace fossils, and cast fossils
what is the difference between a element and a compound
element: cannot be separated into a simpler substance, it has no bonds and can be made up of ONLY ONE kind of atom. compound: 2 or more substances chemically combined, has bonds, and can be made up of more than one atom.
what is the geological time scale
the geological time scale is the way scientist see how old earth is
what is natural selection
is the tendency where more favorable traits get selected by nature over less favorable traits
what is a niche
is generally how a species makes a living in its environment
how do scientist determine the age of fossils
carbon dating
how many elements are there in the periodic table
118
what is seafloor spreading
sea floor spreading is the movement of earths crust away from mid ocean ridges
what are analogous structures
are structures who have the same function but they do not share a common origin
what is competition
when two or more organisms compete for food or anything else to survive
how do fossils form
when an organism dies and is quickly buried by sediment, usually mud or sand, in a watery environment. Soft tissues decompose, leaving behind hard parts like bones or shells.
what does the atomic number of a element represent
the number of protons in a nucleus
what are plate tectonics
things underground that make the continents or land move
what is evolution
evolution is a cumulative change in the characteristics in the population over time
what are biotic factors
the biotic factors a environment has are its living components
what can we learn from past life about fossils
the history of earth
what is the law of conservation of mass
mass is neither created nor destroyed
what is the law of superposition
old rock layers are at the bottom of the surface and new rock layers are at the top of the ground
what are homologous structures
are structures found on one species that have the same basic structure and embryonic origin as those found on another species.
what are abiotic factors
abiotic factors are the nonliving factors in the environment