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P4 Science · Chapter 19brightbit.net/worksheets

The Solar System

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  1. 1.

    What is the correct order of the planets from the Sun outwards?

    (a) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune(b) Mercury, Earth, Venus, Mars, Saturn, Jupiter, Uranus, Neptune(c) Venus, Mercury, Earth, Mars, Jupiter, Saturn, Neptune, Uranus(d) Mercury, Venus, Mars, Earth, Jupiter, Saturn, Uranus, Neptune
  2. 2.

    What keeps the planets in their orbits around the Sun?

    (a) A physical cable connecting each planet to the Sun(b) The gravitational force of the Sun acting on each planet(c) The planets pushing against the solar wind(d) Magnetic force from the Sun
  3. 3.

    What is a satellite?

    (a) A star that orbits a planet(b) Any natural or artificial object that orbits a larger body(c) A piece of rock floating freely in space(d) A planet that orbits another planet
  4. 4.

    How long does it take the Earth to complete one full orbit around the Sun?

    (a) 24 hours(b) 28 days(c) 365.25 days (approximately 1 year)(d) 100 years
  5. 5.

    What causes day and night on Earth?

    (a) The Earth orbiting the Sun once a day(b) The Moon blocking sunlight from the Earth(c) The Earth rotating on its own axis once every 24 hours(d) The Sun moving around the Earth
  6. 6.

    What is a light-year?

    (a) The time it takes light to reach the Earth from the Sun(b) The distance light travels in one year (about 9.46 trillion km)(c) A unit of time equal to one year(d) The brightness of a star measured from Earth
  7. 7.

    Which planet is the largest in our Solar System?

    (a) Saturn(b) Earth(c) Jupiter(d) Neptune
  8. 8.

    What is the difference between a star and a planet?

    (a) Stars are smaller than planets(b) Stars produce their own light and heat by nuclear fusion; planets do not and only reflect light(c) Planets orbit moons; stars orbit planets(d) Stars are made of rock; planets are made of gas
  9. 9.

    Name the INNER four rocky planets of the Solar System.

    Answer: ____________________________________

  10. 10.

    The Sun is about 150 million km from Earth. If light travels at 300,000 km per second, approximately how many minutes does it take sunlight to reach Earth?

    Answer: ____________________________________

Answer key — P4 Science: The Solar System

For parents. Step-by-step explanations for every question are free on brightbit.net.

  1. 1.(a) Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
  2. 2.(b) The gravitational force of the Sun acting on each planet
  3. 3.(b) Any natural or artificial object that orbits a larger body
  4. 4.(c) 365.25 days (approximately 1 year)
  5. 5.(c) The Earth rotating on its own axis once every 24 hours
  6. 6.(b) The distance light travels in one year (about 9.46 trillion km)
  7. 7.(c) Jupiter
  8. 8.(b) Stars produce their own light and heat by nuclear fusion; planets do not and only reflect light
  9. 9.Mercury Venus Earth Mars
  10. 10.about 8 minutes
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