He developed a system for predicting planetary positions that remained in use for some 1,500 years.
A) Tycho Brahe
B) Copernicus
C) Kepler
D) Galileo
E) Ptolemy
Question 2
What do we mean when we say that particles such as neutrinos or WIMPs are weakly interacting?
A) The light that they emit is so weak that it is undetectable to our telescopes.
B) They are only weakly bound by gravity, which means they can fly off and escape from galaxies quite easily.
C) They respond to the weak force but not to the electromagnetic force, which means they cannot emit light.
D) They interact with other matter only through the weak force and not through gravity or any other force.
The Major Components of the Limbic System
Flynn Effect IQ scores have risen across developed countries in recent decades. Source: Flynn (199
Checklist of Developmental Skills: Birth to 5 years Cont.
The respiratory system.
The Global Positioning System determines the location of an object from its distances to ...
The central nervous system is composed of the brain and the spinal cord