Chemistry
Give me an example of a pure substance?
answers will vary
Most of all freshwater on Earth is what?
frozen
Scientist observe these to track earth's past weather/climate
Ice Cores
A tiny, nonliving particle that invades and then reproduces inside a living cell.
virus
the struggle between organisms to survive in a habitat with limited resources
competition
How is the periodic table arranged?
Increasing atomic number from left to right
Area where fresh/salt water mix. Great area for fish nurseries and acts as natural filter for ocean
Estuary
This method of determining the age of rocks/fossils gives scientist a more exact age.
radioactive dating
This kills/slows down the growth of bacteria
anti-biotics
Interaction that benefits one species, no effect on the other
Commensalism
A solid that forms from a solution during a chemical reaction.
Precipitate
When water is murky/and sediment is evident in the water
Turbidity
Fossils can only be formed in this type of rock
Sedimentary
This organism transmits disease
vector
When two species live together, but neither species goes extinct.
Coexistence
Chemical or physical change?
Ice Melting
Physical Change
Water is considered to be this due to its ability to dissolve many things
universal solvent
The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.
Law of superposition
a metabolic process that requires oxygen
Aerobic
limiting factors include competition (for food, water, shelter & space), predation, parasitism, and disease
Density Dependent Factor
Using the pH scale, would bleach (9.6) be considered a acid or base?
base
Areas where there are more aquatic life could be a result of being in an area that experiences what?
upwelling
a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
Index Fossil
Two processes that plants and animals use to produce energy
photosynthesis and cell respiration
An organism's particular role in an ecosystem, or how it makes its living.
Niche