1) What happens every day (24h)? a) The earth spins once around its axis. b) The earth orbits the sun. c) The moon orbits the earth. d) The earth tilts towards the sun. 2) The sun rises in the ... a) North b) South c) East d) West 3) The sun gets highest in the sky in ... a) Spring b) Summer c) Autumn d) Winter 4) Why do we experience four seasons? a) It gets hotter when the earth gets nearer to the sun. b) Because there are twelve months in the year. c) Because the earth spins on its axis. d) Because the earth's axis is tilted from the path of its orbit. 5) Why do stars disappear in the daytime? a) Because they set when the sun rises. b) Because the sun is too bright for us to see them. c) Because they only reflect moonlight. d) They go round the other side of the earth. 6) Which of the following statements is false? a) The four smallest planets orbit nearest to the sun. b) The farther a planet is from the sun, the longer it takes to orbit the sun. c) Pluto is the smallest planet. d) The four largest planets all have rings and more than ten moons. 7) Which of the following do not orbit the sun? a) The Moon b) Dwarf planet Ceres c) The Earth d) Comets 8) Which is the only luminous body in the solar system? a) A comet b) Venus c) The full moon d) The Sun 9) If I travel to the moon, which of the following statements is true. a) My mass and weight stay the same. b) My mass stays the same, but my weight decreases. c) My weight stays the same, but my mass decreases. d) Both my mass and weight decrease. 10) The Curiosity rover has a mass of 900kg. What is its weight on Mars, where gravity is 3.7m/s²? a) 3330 N b) 243 N c) 900 kg d) 937 kg 11) How do satellites stay in orbit? a) They use their rocket thrusters. b) The earth's gravity holds them in orbit if their speed is just right. c) They spin faster than the earth. d) They just float because there is no gravity in space. 12) Which type of orbit is best for satellites that broadcast TV programmes? a) Low earth orbit b) Medium earth orbit c) Geostationary orbit d) High earth orbit 13) Approximately how long does it take for the moon to orbit the earth? a) 90 minutes b) 24 hours c) 29 days d) 365.25 days 14) Why does the moon have phases? a) The moon always has the same side facing the earth. b) The moon changes shape as it orbits the earth. c) The moon is luminous. d) We can only see the part which is illuminated by the sun. 15) Which of the following is not caused by the moon? a) Tides. b) Night and day. c) Solar eclipses. d) Hiding (occultation) of stars. 16) We see a partial solar eclipse when ... a) We are in the moon's umbra. b) We are in the moon's penumbra. c) The moon is in the earth's umbra. d) The moon is in the earth's penumbra.

ELEMENTS in COMPOUNDS

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