The Solar System questions

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The Solar System question collection

Review The Solar System questions for Physics, with correct answers shown and coverage across choosing which equation gives weight W near Earth's surface; defining the approximate value of gravitational field strength g on Earth; if an astronaut has mass 70\,\mathrm{kg} on Earth, what is the weight on the Moon where g is 1.6\,\mathrm{N/kg}.

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Question 1

Which equation gives weight \(W\) near Earth's surface?
  1. \(W = mg\)
  2. \(W = m + g\)
  3. \(W = \frac{m}{g}\)
  4. \(W = mg^2\)

Question 2

What is the approximate value of gravitational field strength \(g\) on Earth?
  1. \(10\,\mathrm{N/kg}\)
  2. \(1\,\mathrm{N/kg}\)
  3. \(100\,\mathrm{N/kg}\)
  4. \(0.1\,\mathrm{N/kg}\)

Question 3

If an astronaut has mass \(70\,\mathrm{kg}\) on Earth, what is the weight on the Moon where \(g\) is \(1.6\,\mathrm{N/kg}\)?
  1. \(112\,\mathrm{N}\)
  2. \(700\,\mathrm{N}\)
  3. \(1120\,\mathrm{N}\)
  4. \(16\,\mathrm{N}\)

Question 4

What name describes the inward force needed for an orbit?
  1. Centripetal force
  2. Centrifugal force
  3. Frictional force
  4. Upthrust

Question 5

What causes the seasons on Earth?
  1. The tilt of Earth’s axis as it orbits the Sun
  2. The changing distance between Earth and the Sun
  3. The Moon's changing position as it orbits Earth
  4. The Sun's changing energy output during the year

Question 6

When it is summer in the northern hemisphere, what happens in the southern hemisphere?
  1. It is winter there
  2. It is also summer
  3. There are no seasons
  4. It is autumn

Question 7

What distance is one astronomical unit (AU)?
  1. The mean distance from Earth to the Sun
  2. The distance light travels in one year
  3. The mean distance from Earth to the Moon
  4. The diameter of the Milky Way

Question 8

How far does light travel in one year?
  1. \(9.46 \times 10^{15}\,\mathrm{m}\)
  2. \(3 \times 10^8\,\mathrm{m}\)
  3. \(9.46 \times 10^5\,\mathrm{m}\)
  4. \(1.5 \times 10^{10}\,\mathrm{m}\)

Question 9

What keeps planets in orbit around the Sun?
  1. The Sun's gravity
  2. The Sun's magnetism
  3. Pressure from solar wind
  4. Pressure from sunlight

Question 10

What is our Sun classified as?
  1. A star
  2. A planet
  3. An asteroid
  4. A comet

Question 11

Which force acts between two masses even when they are not touching?
  1. Gravity
  2. Friction
  3. Tension
  4. Elastic

Question 12

Four identical bags have different masses. Which has the greatest weight at the same location?
  1. 5 kg
  2. 3 kg
  3. 2 kg
  4. 1 kg

Question 13

What does a planet's gravitational field do?
  1. Attracts objects with mass
  2. Attracts objects with electric charge
  3. Aligns magnetic materials
  4. Slows objects moving through a fluid

Question 14

What is the main reason space telescopes orbit Earth?
  1. To avoid atmospheric distortion
  2. To move them closer to distant stars
  3. To keep them above one ground point
  4. To use Earth's gravity as a magnifying lens

Question 15

Which layer protects Earth from most meteorites?
  1. Atmosphere
  2. Core
  3. Crust
  4. Core mantle boundary

Question 16

Which motion causes day and night?
  1. Earth rotating on its axis
  2. Earth orbiting the Sun
  3. The Moon orbiting Earth
  4. The Sun rotating on its axis

Question 17

About how long does the Moon take to orbit Earth?
  1. 28 days
  2. 24 hours
  3. 365 days
  4. 12 hours

Question 18

How does gravity between Earth and Moon affect tides?
  1. It pulls seawater into tidal bulges
  2. It pushes seawater away from the Moon
  3. It changes the temperature of seawater
  4. It changes the Moon's brightness

Question 19

What is a comet mainly made from?
  1. Ice, dust and rock
  2. Hydrogen plasma and helium
  3. Molten metal and rock
  4. Liquid water and soil

Question 20

What is the advantage of using light-years for star distances?
  1. Manageable numbers for vast distances
  2. A correction for each star's brightness
  3. The travel time of the light
  4. A measure of each star's age

Question 21

Why do astronauts feel weightless while orbiting Earth?
  1. They fall around Earth with their spacecraft
  2. They have moved beyond Earth's gravity
  3. Their rockets balance Earth's gravity
  4. The Moon's gravity cancels Earth's gravity

Question 22

What causes one year on Earth?
  1. Earth completing one orbit of the Sun
  2. Earth rotating once on its axis
  3. The Moon completing one orbit
  4. The Sun rotating once

Question 23

What is at the centre of our Solar System?
  1. The Sun
  2. Earth
  3. The Moon
  4. Jupiter

Question 24

Why does the Moon have phases?
  1. Our view of its sunlit half changes
  2. Earth's shadow moves across it each month
  3. Its surface emits different amounts of light
  4. Its shape changes during each orbit

Question 25

Which description defines a galaxy?
  1. A vast collection of stars, gas and dust bound by gravity
  2. A star and the planets orbiting it
  3. A pattern of stars seen from Earth
  4. A cloud of gas forming one new star

Question 26

If Earth's gravity vanished, which path would an orbiting satellite follow?
  1. A straight line tangent to its orbit
  2. A straight line directly away from Earth
  3. The same circular orbit
  4. A vertical fall toward Earth

Question 27

What can a communications satellite do?
  1. Relay signals between distant ground stations
  2. Collect cloud images for weather forecasts
  3. Calculate position from signal timing
  4. Observe stars above the atmosphere

Question 28

What can a weather satellite do?
  1. Collect cloud images for forecasts
  2. Relay telephone signals between continents
  3. Calculate position from signal timing
  4. Observe distant galaxies above the atmosphere

Question 29

What does a light-year measure?
  1. Distance light travels in one year
  2. Time light takes to reach Earth
  3. Brightness of a distant star
  4. Age of a distant galaxy

Question 30

Why are planets visible from Earth?
  1. They reflect light from the Sun
  2. They produce visible light by nuclear fusion
  3. Earth's atmosphere shines light onto them
  4. The Moon reflects light onto every planet

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Review The Solar System questions for Physics, with correct answers shown and coverage across choosing which equation gives weight W near Earth's surface; defining the approximate value of gravitational field strength g on Earth; if an astronaut has mass 70\,\mathrm{kg} on Earth, what is the weight on the Moon where g is 1.6\,\mathrm{N/kg}.

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