Practice PMS questions with answers and explanations.
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Jupiter is the largest planet by mass and diameter.
It is a gas giant with many moons.
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Mars appears reddish because of iron oxide on its surface.
It is therefore called the Red Planet.
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Saturn has an extensive system of icy rings.
Other giant planets also have rings, but Saturn's are most visible.
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The Moon is Earth's only natural satellite.
It orbits Earth and influences ocean tides.
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Earth rotates on its axis approximately once every 24 hours.
The side facing the Sun experiences day.
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Earth's tilted axis changes the angle and duration of sunlight during its orbit.
This produces the seasons.
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Isaac Newton formulated three laws of motion and the law of universal gravitation.
His work shaped classical physics.
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The joule is the SI unit of energy and work.
It is named after James Prescott Joule.
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Power is the rate of doing work or using energy.
Its SI unit is the watt.
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Electric current is measured in amperes.
The unit is named after André-Marie Ampère.
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A barometer measures atmospheric pressure.
It is useful in weather observation and forecasting.
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A thermometer measures temperature.
Different types use liquids, electronics, or infrared radiation.
