Measurements or observations that are systematically recorded
What is Data
100
The twisted ladder shape of a double-stranded DNA molecule
What is double helix
200
A region where two tectonic plates are moving away from each other
What is divergent boundary
200
The number of chromosomes in a somatic cell
What is diploid number
200
A measure of the mass of a substance per unit volume
What is density
200
An organism that obtains energy and nutrients by breaking down organic wastes
What is decomposer
200
A table that organizes related data into rows and columns, with independent variable in first column and dependent variables in the other column
What is data table
300
A unit measuring the intensity or loudness of a sound
What is decibel
300
The process in which erosion transports sediments and drops them in new location
What is deposition
300
Allele or trait always expressed in an organism
What is dominant
300
The change in the apparent frequency of a wave due to its source moving toward or away from observer
What is Doppler effect
300
A measure of how far an object moves, regardless of direction.
What is Distance
400
The net change in an object's position as a result of motion
What is displacement
400
A triangular deposit of sediment in a flat, shallow area where a river empties into a body of water
What is delta
400
The complete clearing and destruction of a forest to obtain wood or make space available for construction or farming
What is deforestation
400
The nucleic acid that transmits genetic information from parent to offspring and encodes the instructions for cellular activity and formation of proteins
What is DNA
400
The spreading of gas particles until they are evenly distributed throughout a space.
What is diffusion
500
A tool, consisting of sets of paired statements, that helps scientists identify organisms that they encounter in nature
What is dichotomous key
500
The spreading of waves as they pass through an opening or move around an obstacle
What is diffraction
500
The variable that is measured in an experiment and is influenced by independent variable
What is dependent variable
500
A factor that limits the growth of a population regardless of density
What is density-independent limiting factor
500
A limiting factor that varies according to the density of a population