1. About 70% of the mass of the Sun consists of _______ gas.   hydrogen   helium   nitrogen   oxygen   Hint Half-n-half Clue   2. In nursery rhymes, what was the color of Mary's lamb?   gray   brown   white   black   Half-n-half Clue   3. The sharp-edged front teeth are called _______   premolars   molars   canines   incisors   Half-n-half Clue   4. A _______ crossing is a place for pedestrians to cross safely by operating lights that signal the traffic to stop.   pelican   peregrine   penguin   peacock   Half-n-half Clue   5. Whose nose grew each time he lied?   Pied Piper   Pinnochio   Peter Pan   Popeye   Half-n-half Clue   6. Which is the odd one out?   Beech   Elder   Birch   Tulip   Half-n-half Clue   7. The color of the eye depends upon the pigment in the _______   iris   cornea   retina   pupil   Half-n-half Clue