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Our solar system
Recall key facts about planets, moons and our solar system from a verified question bank. Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 7-9
Our solar system
Take your time. Show your thinking.
1. Which planet is farthest from the Sun among the eight planets: Neptune or Venus?
2. What force keeps the planets in orbit around the Sun: gravity or magnetism?
3. Which planet is the hottest in our solar system due to its thick carbon dioxide atmosphere: Venus or Mars?
4. How many planets are in our solar system (excluding dwarf planets): 8 or 12?
5. What causes the cycle of seasons on Earth: Earth’s tilted axis or changes in the Sun’s size?
6. What lies at the centre of our solar system: the Sun or the Moon?
7. What nuclear process in the Sun’s core releases light and heat energy: nuclear fusion of hydrogen into helium, or burning coal?
8. Which phase of the Moon occurs when the entire Earth-facing side is illuminated by sunlight: Full Moon or Crescent Moon?
9. What is Saturn’s largest moon, which has a dense nitrogen-rich atmosphere: Titan or Phobos?
10. What is the giant storm on Jupiter that has raged for centuries called: the Great Red Spot or the Lunar Mare?
11. What icy solar-system body develops a glowing coma and tail when its orbit brings it close to the Sun: a comet or a crater?
12. Does the Moon produce its own light or reflect light from the Sun?
12 questions · Seed 104729 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Our solar system
Answers and reasoning. Review before teaching.
1. Which planet is farthest from the Sun among the eight planets: Neptune or Venus?
NeptuneNeptune is the eighth and farthest known planet from the Sun.
2. What force keeps the planets in orbit around the Sun: gravity or magnetism?
GravityGravitational attraction between the Sun and the planets keeps them in orbit.
3. Which planet is the hottest in our solar system due to its thick carbon dioxide atmosphere: Venus or Mars?
VenusVenus has an intense greenhouse effect that traps heat, making it hotter than Mercury.
4. How many planets are in our solar system (excluding dwarf planets): 8 or 12?
8The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
5. What causes the cycle of seasons on Earth: Earth’s tilted axis or changes in the Sun’s size?
Earth’s tilted axisEarth’s 23.5° axial tilt causes different hemispheres to receive more direct sunlight through the year.
6. What lies at the centre of our solar system: the Sun or the Moon?
The SunThe Sun is the star at the centre of our solar system, and all planets orbit it.
7. What nuclear process in the Sun’s core releases light and heat energy: nuclear fusion of hydrogen into helium, or burning coal?
Nuclear fusion of hydrogen into heliumThe Sun fuses hydrogen nuclei into helium under extreme core temperature and pressure.
8. Which phase of the Moon occurs when the entire Earth-facing side is illuminated by sunlight: Full Moon or Crescent Moon?
Full MoonAt Full Moon, Earth lies between the Sun and the Moon.
9. What is Saturn’s largest moon, which has a dense nitrogen-rich atmosphere: Titan or Phobos?
TitanTitan is Saturn’s largest moon and the second-largest moon in the solar system.
10. What is the giant storm on Jupiter that has raged for centuries called: the Great Red Spot or the Lunar Mare?
Great Red SpotJupiter’s Great Red Spot is a persistent high-pressure anticyclonic storm.
11. What icy solar-system body develops a glowing coma and tail when its orbit brings it close to the Sun: a comet or a crater?
CometSolar heating sublimates a comet’s ices, releasing gas and dust tails.
12. Does the Moon produce its own light or reflect light from the Sun?
Reflects light from the SunThe Moon shines because its surface reflects sunlight toward Earth.
12 questions · Seed 104729 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Our solar system
Take your time. Show your thinking.
1. Which planet is farthest from the Sun among the eight planets: Neptune or Venus?
2. What force keeps the planets in orbit around the Sun: gravity or magnetism?
3. Which planet is the hottest in our solar system due to its thick carbon dioxide atmosphere: Venus or Mars?
4. How many planets are in our solar system (excluding dwarf planets): 8 or 12?
5. What causes the cycle of seasons on Earth: Earth’s tilted axis or changes in the Sun’s size?
6. What lies at the centre of our solar system: the Sun or the Moon?
7. What nuclear process in the Sun’s core releases light and heat energy: nuclear fusion of hydrogen into helium, or burning coal?
8. Which phase of the Moon occurs when the entire Earth-facing side is illuminated by sunlight: Full Moon or Crescent Moon?
9. What is Saturn’s largest moon, which has a dense nitrogen-rich atmosphere: Titan or Phobos?
10. What is the giant storm on Jupiter that has raged for centuries called: the Great Red Spot or the Lunar Mare?
11. What icy solar-system body develops a glowing coma and tail when its orbit brings it close to the Sun: a comet or a crater?
12. Does the Moon produce its own light or reflect light from the Sun?
12 questions · Seed 104729 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Our solar system
Answers and reasoning. Review before teaching.
1. Which planet is farthest from the Sun among the eight planets: Neptune or Venus?
NeptuneNeptune is the eighth and farthest known planet from the Sun.
2. What force keeps the planets in orbit around the Sun: gravity or magnetism?
GravityGravitational attraction between the Sun and the planets keeps them in orbit.
3. Which planet is the hottest in our solar system due to its thick carbon dioxide atmosphere: Venus or Mars?
VenusVenus has an intense greenhouse effect that traps heat, making it hotter than Mercury.
4. How many planets are in our solar system (excluding dwarf planets): 8 or 12?
8The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
5. What causes the cycle of seasons on Earth: Earth’s tilted axis or changes in the Sun’s size?
Earth’s tilted axisEarth’s 23.5° axial tilt causes different hemispheres to receive more direct sunlight through the year.
6. What lies at the centre of our solar system: the Sun or the Moon?
The SunThe Sun is the star at the centre of our solar system, and all planets orbit it.
7. What nuclear process in the Sun’s core releases light and heat energy: nuclear fusion of hydrogen into helium, or burning coal?
Nuclear fusion of hydrogen into heliumThe Sun fuses hydrogen nuclei into helium under extreme core temperature and pressure.
8. Which phase of the Moon occurs when the entire Earth-facing side is illuminated by sunlight: Full Moon or Crescent Moon?
Full MoonAt Full Moon, Earth lies between the Sun and the Moon.
9. What is Saturn’s largest moon, which has a dense nitrogen-rich atmosphere: Titan or Phobos?
TitanTitan is Saturn’s largest moon and the second-largest moon in the solar system.
10. What is the giant storm on Jupiter that has raged for centuries called: the Great Red Spot or the Lunar Mare?
Great Red SpotJupiter’s Great Red Spot is a persistent high-pressure anticyclonic storm.
11. What icy solar-system body develops a glowing coma and tail when its orbit brings it close to the Sun: a comet or a crater?
CometSolar heating sublimates a comet’s ices, releasing gas and dust tails.
12. Does the Moon produce its own light or reflect light from the Sun?
Reflects light from the SunThe Moon shines because its surface reflects sunlight toward Earth.
12 questions · Seed 104729 · Age guidance, not curriculum certification