Which of the following layers of the Earth is unique among the terrestrial planets?
A) hydrosphere
B) ionosphere
C) mantle
D) crust
E) core
Question 2
What are constellations?
A) groups of galaxies gravitationally bound and close together in the sky
B) groups of stars making an apparent pattern in the celestial sphere
C) groups of stars gravitationally bound and appearing close together in the sky
D) ancient story boards, useless to modern astronomers
E) apparent groupings of stars and planets visible on a given evening
The greenhouse effect: heat trapping by earth's atmosphere.
Internal view of the heart illustrating the heart chambers, heart layers, and major blood vessels as
The monthly changes of angle between the direction of illumination by the Sun and viewing from Earth
The rock cycle and the Earth’s physical environment
Earth’s Major Lithospheric Plates
Planet Z-34 has a mass equal to 1/3 that of Earth, a radius equal to 1/3 that of Earth, and an ...