Astronomy 1

The graph shows the observed water levels, in feet (ft), for a tide gauge located at Montauk, New

York, on the easternmost end of Long Island, from January 24, 2008 to noon on January 25, 2008.

What causes the water-level variation pattern shown by the graph?

• cyclic and not predictable

• noncyclic and predictable

• cyclic and predictable

• noncyclic and not predictable

The graph shows the observed water levels, in feet (ft), for a tide gauge located at Montauk, New

York, on the easternmost end of Long Island, from January 24, 2008 to noon on January 25, 2008.

What causes the water-level variation pattern shown by the graph?

• Earth's rotation and the gravitational pull of the Moon

• changes in wind velocity produced by coastal storms

• changes in magnetic orientation of the North American Plate

• Earth's revolution and the distance from the equator

Which two characteristics do all Jovian planets have

in common?

• large diameters and low densities

• large diameters and high densities

• small diameters and low densities

• small diameters and high densities

Which statement best describes the geocentric model

of our solar system?

• The Earth is located at the center of the model

• The Sun is located at the center of the model.

• All planets revolve around the Sun.

• All planets except the Earth revolve around the Sun.

Which list shows stars in order of increasing temperature?

• Barnard's Star, Polaris, Sirius, Rigel

• Aldebaran, the Sun, Rigel, Procyon B

• Rigel, Polaris, Aldebaran, Barnard's Star

• Procyon B, Alpha Centauri, Polaris, Betelgeuse

A blue shift of the light from a star indicates that the star

• will soon become a giant star

• is moving away from Earth

• will soon become a main sequence star

• is moving closer to Earth

Base your answer to the following question on the diagram below and on your knowledge of Earth

science. The diagram represents Earth in its orbit around the Sun. Locations A through D represent four

positions of Earth in its orbit. Earth is closest to the Sun (perihelion) at position A, and farthest from

the Sun (aphelion) at position C.

At all four positions, the northern end of Earth's axis points toward

• Betelgeuse

• the Sun

• the Moon

• Polaris

Evidence that the universe is expanding is best supported by the observation that the wavelengths of light from distant galaxies are shifted toward the

• blue end of the spectrum because they are lengthened

• red end of the spectrum because they are lengthened

• red end of the spectrum because they are shortened

• blue end of the spectrum because they are shortened

Which event occurred approximately 4.6 billion years ago?

• evolution of the earliest fish

• evolution of stromatolites

• formation of the oldest known Earth rocks

• formation of Earth and our solar system

Energy is produced within a star's core by the process of

• nuclear fusion

• insolation

• conduction

• radioactive decay