Examlex
A planet's sidereal orbital period can be measured from repeated observations of its location inthe sky (so long as Earth's own motion around the Sun is properly taken into account).
Normal Distribution
A bell-shaped frequency distribution curve where most of the occurrences take place around the central peak and the probabilities of values further away from the mean taper off equally in both directions.
Food Production
The processes involved in generating food products for consumption, including agriculture, livestock breeding, and aquaculture.
Efficiency
The ability to accomplish a job with a minimum expenditure of time and effort, or the ratio of the output to the input of any system.
Sustainable
The practice of using natural resources in a way that maintains ecological balance and ensures availability for future generations.
Q5: Venus's temperature is fairly uniform over the
Q20: From the center outward, the correct order
Q24: The Kuiper Belt is an "outer asteroid
Q31: A major advantage of a Newtonian reflector
Q35: Only a hot, thin gas can produce
Q64: What problem is adaptive optics designed to
Q74: Galaxies look the same whether viewed in
Q77: Which of the Galilean moons is the
Q90: A major surprise from space exploration is
Q91: From Earth, due to their motions and