SOLAR SYSTEM PLANK QUESTIONS
1 In ancient times, people thought ____ was at the center of the universe.
'the Earth', 'the sun', 'the moon', 'a black hole'
 
2 What is at the center of our solar system?    
'planet Earth', 'the sun', 'no one knows', 'empty space' 

3 Orbiting around our Sun are:    
'8 planets, a few dwarf planets including Pluto, 170 or so moons, dust, gas and thousands of asteroids and comets', '9 planets, a few moons, hundreds of asteroids and comets, dust and gas', '8 planets'  
 
4 Which planet is closest to the sun?    
'Mercury', 'Venus', 'Earth', 'Mars'

5 The planets, listed in order from smallest to largest, are:   
'Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, Jupiter', 'Venus, Mercury, Mars, Earth, Uranus, Saturn, Jupiter, Neptune', 'Mercury, Mars, Venus,  Neptune, Uranus, Earth, Saturn, Jupiter'   

6 The planets, listed from nearest the sun to farthest, are -    
'Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune', 'Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune', 'Mercury, Venus, Mars, Earth,  Jupiter, Saturn, Uranus, Neptune'  
 
7 This planet is similar to Earth in size, but has a permanent blanket of clouds that traps enough heat to melt lead.
'Venus', 'Neptune', 'Mercury', 'Mars'

8 Due to the canyons and river beds on its surface, it is believed that long ago, this planet  had a warm, wet, Earth-like climate.    
'Mars', 'Uranus', 'Mercury', 'Neptune' 

9 Which planet is the largest in our solar system, is 5th from the sun, and has no solid surface?    
'Jupiter', 'Saturn', 'Neptune', 'Mars' 

10 Which was considered a planet until 2006 when, due to its small size and irregular orbit,  it became a “dwarf planet”?    
'Pluto', 'Ceres', 'Charon'  


CORRECT VERSION
"In ancient times, people thought ____ was at the center of the universe.",
"What is at the center of our solar system?",
"Orbiting around our Sun are:",
"Which planet is closest to the sun?",
"The planets, listed in order from smallest to largest, are:",
"The planets, listed from nearest the sun to farthest, are - ",
"This planet is similar to Earth in size, but has a permanent blanket of clouds that traps enough heat to melt lead.",
"Due to the canyons and river beds on its surface, it is believed that long ago, this planet  had a warm, wet, Earth-like climate.",
"Which planet is the largest in our solar system, is 5th from the sun, and has no solid surface?",
"Which was considered a planet until 2006 when, due to its small size and irregular orbit,  it became a 'dwarf planet'?",

['the Earth', 'the sun', 'the moon', 'a black hole'],
['the sun', 'planet Earth', 'no one knows', 'empty space'],
['8 planets, a few dwarf planets including Pluto, 170 or so moons, dust, gas and thousands of asteroids and comets', '9 planets, a few moons, hundreds of asteroids and comets, dust and gas', '8 planets and their moons', 'all of the above plus several stars'],
['Mercury', 'Venus', 'Earth', 'Mars'],
['Mercury, Mars, Venus, Earth, Neptune, Uranus, Saturn, Jupiter', 'Venus, Mercury, Mars, Earth, Uranus, Saturn, Jupiter, Neptune', 'Mercury, Mars, Venus,  Neptune, Uranus, Earth, Saturn, Jupiter', 'Saturn, Mercury, Mars, Venus,  Neptune, Uranus, Earth, Jupiter'],
['Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune', 'Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune', 'Mercury, Venus, Mars, Earth,  Jupiter, Saturn, Uranus, Neptune', 'Earth, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune'],
['Venus', 'Neptune', 'Mercury', 'Mars'],
['Mars', 'Uranus', 'Mercury', 'Neptune'],
['Jupiter', 'Saturn', 'Neptune', 'Mars'],
['Pluto', 'Ceres', 'Charon', 'Saturn']