(1) The Drake Equation states that the number of civilizations we can expect to detect is proportional to: - (b) the rate at which civilizations are formed multiplied by the time that they broadcast (2) The cause of the seasons is - (b) The tilt of the Earth's axis relative to the Ecliptic (3) The resolution of telescopes used on Earth are limited by - (d) diameter of the telescope and motion of air in the atmosphere (4) If the Earth-Sun distance is represented by 30 feet, the nearest star is approximately in - (a) Saskatoon (5) The difference between the Sidereal day and the Solar day is because of - (d) The relative motion of the Earth around the Sun (6) The (small angle) angular diameter relationship is theta=D/d where theta is the angular size of the object, D is the objects physical diameter, and d is the objects distance from the observer. If theta=0.1 radians and the diameter of the object is 1 cm, how far away is it? - (c) 0.1 m (7) As the distance to an object increases, the parallax angle - (c) reduces as the inverse of the distance (8) Apparent brightness (flux) is related to luminosity by a - (c) Inverse square relationship with distance (9) The Doppler shift causes light from an object that is moving away from us to be - (b) Red-shifted (10) We can determine the chemical composition of stars by measuring - (d) atomic \& molecular absorption lines in the star's spectrum