Earth and Space
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
The Earth’s Structure and Atmosphere
SubtopicThe Earth’s Structure and Atmosphere under Earth and Space for Grade 7 IGCSE.
Preview questions (no answers)
- 1.
Which gas is released into the atmosphere by volcanic eruptions and burning fossil fuels?
A.Oxygen
B.Nitrogen
C.Carbon dioxide
D.Argon
- 2.
What is the temperature trend in the Stratosphere as altitude increases?
A.It decreases
B.It increases
C.It stays the same
D.It drops to absolute zero
- 3.
Which layer is immediately above the Stratosphere?
A.Troposphere
B.Thermosphere
C.Mesosphere
D.Exosphere
- 4.
In which layer of the Earth would you find the most iron?
A.The Core
B.The Crust
C.The Atmosphere
D.The Oceans
- 5.
The diagram illustrates the exchange of two important gases between living organisms. Which option correctly identifies Gas 1, Gas 2, and the layer of the atmosphere where this cycle primarily occurs?
A.Gas 1: Oxygen (); Gas 2: Carbon Dioxide (); Stratosphere
B.Gas 1: Oxygen (); Gas 2: Carbon Dioxide (); Troposphere
C.Gas 1: Carbon Dioxide (); Gas 2: Oxygen (); Troposphere
D.Gas 1: Carbon Dioxide (); Gas 2: Oxygen (); Stratosphere
- 6.
Why is the troposphere the densest layer of the atmosphere?
A.It contains the ozone layer.
B.It is the layer closest to the Sun.
C.The weight of all the air above it compresses the gas molecules.
D.It is where all the water vapor is located.
- 7.
The majority of the Earth's crust is made up of which two elements?
A.Iron and Nickel
B.Oxygen and Silicon
C.Nitrogen and Oxygen
D.Carbon and Hydrogen
- 8.
Considering the Earth's atmosphere was once rich in and , why did the rise of lead to a period of global cooling known as the 'Huronian Glaciation'?
A.Oxygen is a cooling gas that reflects all sunlight
B.Oxygen reacted with methane (a potent greenhouse gas) to form and water, weakening the greenhouse effect
C.The oxygen blocked the sun's rays directly
D.The oxygen caused the core of the Earth to cool down
- 9.
Which of the following is the most accurate description of the 'Lithosphere'?
A.It is only the continental crust
B.It consists of the crust and the uppermost, rigid part of the mantle
C.It is the liquid layer below the crust
D.It is the name for the gases trapped in the Earth's rocks
- 10.
Why does the concentration of water vapor in the atmosphere decrease so rapidly with altitude?
A.Water vapor is too heavy to rise above 2km
B.Lower temperatures at higher altitudes cause water vapor to condense and fall as precipitation
C.The sun's radiation breaks water into hydrogen and oxygen at low altitudes
D.The ozone layer absorbs all the water molecules
Download the worksheet for Earth and Space - The Earth’s Structure and Atmosphere to practice offline. It includes additional chapter-level practice questions.
The Solar System and Planets
SubtopicThe Solar System and Planets under Earth and Space for Grade 7 IGCSE.
Preview questions (no answers)
- 1.
Which of these describes the rotation of the Earth?
A.The Earth moving around the Sun
B.The Moon moving around the Earth
C.The Earth spinning on its axis
D.The Sun spinning on its axis
- 2.
How many moons does the planet Mercury have?
A.Zero
B.One
C.Two
D.More than ten
- 3.
What is the name for a large ball of ice and dust that develops a glowing tail as it gets closer to the Sun?
A.Meteoroid
B.Asteroid
C.Comet
D.Dwarf planet
- 4.
Which of the following is true about the Outer Planets (Jupiter, Saturn, Uranus, Neptune)?
A.They are all smaller than Earth
B.They are all made of solid rock
C.They all have ring systems
D.They are all closer to the Sun than Mars
- 5.
Which planet has the strongest winds in the Solar System, reaching speeds of over km/h?
A.Earth
B.Jupiter
C.Neptune
D.Venus
- 6.
What is the Sun's 'Corona'?
A.The dark spots on its surface
B.The outermost layer of its atmosphere
C.The very center where energy is produced
D.The solid crust of the Sun
- 7.
Which of these describes the 'Goldilocks Zone' (Habitable Zone)?
A.The region closest to the Sun where it is hottest
B.The region where temperatures allow liquid water to exist on a surface
C.The area inside a gas giant's rings
D.The core of a star where fusion occurs
- 8.
Which of these planets could potentially be seen transitioning (crossing) in front of the Sun from the surface of the Earth?
A.Venus
B.Mars
C.Jupiter
D.Saturn
- 9.
A 'light-year' is a unit of measurement for:
A.Distance
B.Time
C.Brightness
D.Speed
- 10.
Which gas gives Uranus and Neptune their distinctive blue/cyan color?
A.Methane
B.Ammonia
C.Nitrogen
D.Helium
Download the worksheet for Earth and Space - The Solar System and Planets to practice offline. It includes additional chapter-level practice questions.
The Earth, Moon, and Sun Cycles
SubtopicThe Earth, Moon, and Sun Cycles under Earth and Space for Grade 7 IGCSE.
Preview questions (no answers)
- 1.
The diagram below shows the repeating cycle of seasons that occurs as the Earth revolves around the Sun. Which season is correctly represented by the letter X?
A.Autumn
B.Spring
C.Winter
D.Summer
- 2.
How many times a year does an equinox occur?
A.Once
B.Twice
C.Four times
D.Twelve times
- 3.
What creates a shadow on the ground during a sunny day?
A.The Sun pulling on the Earth.
B.An object blocking the Sun's light.
C.The Earth's rotation stopping.
D.The Moon reflecting light.
- 4.
Which of these describes a Full Moon?
A.The Moon is between the Earth and Sun.
B.The Earth is between the Sun and Moon.
C.The Sun is between the Earth and Moon.
D.The Moon is behind the Sun.
- 5.
Approximately how many rotations does the Earth complete in the time it takes to orbit the Sun once?
A.1 rotation
B.28 rotations
C.365 rotations
D.24 rotations
- 6.
What is the specific name for the phase when the Moon is more than half-lit but not yet a Full Moon?
A.Crescent
B.Gibbous
C.Quarter
D.New
- 7.
What would be the most likely effect if the Earth's axis were not tilted?
A.The Earth would stop rotating
B.There would be no seasons
C.The Moon would crash into Earth
D.The days would be 48 hours long
- 8.
Which of the following describes the Moon's position relative to the Earth and Sun during a Waning Crescent phase?
A.The Moon is moving toward the position between the Earth and the Sun.
B.The Moon is moving away from the position between the Earth and the Sun.
C.The Moon is directly behind the Earth relative to the Sun.
D.The Moon is at a angle to the Sun-Earth line.
- 9.
What is the primary cause of the gradual 'slowing down' of Earth's rotation over millions of years?
A.Friction between the Earth's atmosphere and solar winds.
B.Tidal friction caused by the Moon's gravitational pull on Earth's oceans.
C.The gradual cooling of the Earth's core.
D.The increase in Earth's mass due to space dust.
- 10.
According to Kepler's Second Law (Law of Equal Areas), how does the Moon's orbital velocity change as it moves from its furthest point (Apogee) to its closest point (Perigee) to Earth?
A.The velocity remains constant.
B.The velocity increases.
C.The velocity decreases.
D.The velocity drops to zero at perigee.
Download the worksheet for Earth and Space - The Earth, Moon, and Sun Cycles to practice offline. It includes additional chapter-level practice questions.
Stars and the Universe
SubtopicStars and the Universe under Earth and Space for Grade 7 IGCSE.
Preview questions (no answers)
- 1.
Which of these objects is found in the center of a typical solar system?
A.A planet
B.A star
C.A moon
D.An asteroid
- 2.
Which of the following is true about the stars we see at night?
A.They are all inside our Solar System
B.They are very far away from Earth
C.They are smaller than the Moon
D.They are all the same age
- 3.
How does the temperature of a star relate to its color?
A.All stars are the same temperature
B.Color tells us how hot the star is
C.Color only depends on how far away it is
D.Stars have no temperature
- 4.
Which of these is the largest structure?
A.A Star
B.A Galaxy
C.A Planet
D.The Moon
- 5.
Which of these is NOT a type of galaxy shape classified by astronomers?
A.Spiral
B.Elliptical
C.Square
D.Irregular
- 6.
How long does it take for light from the Sun to reach the Earth?
A.About 8 seconds
B.About 8 minutes
C.About 8 hours
D.About 8 days
- 7.
A star that is much more massive than the Sun is likely to end its life as a:
A.White Dwarf
B.Black Hole or Neutron Star
C.Planet
D.Red Dwarf
- 8.
Why is it impossible for a low-mass star to become a Black Hole?
A.It doesn't have enough hydrogen to start fusion
B.It lacks the necessary gravitational force to collapse its core beyond the white dwarf stage
C.Its core is made of elements that are too light to collapse
D.Low-mass stars always explode completely, leaving no remnant
- 9.
What happens to the temperature of a star as it evolves from a Main Sequence star into a Red Giant?
A.The core temperature decreases while the surface temperature increases
B.The core temperature increases while the surface temperature decreases
C.Both the core and surface temperatures increase significantly
D.Both the core and surface temperatures decrease significantly
- 10.
Which of the following describes a 'Light Year'?
A.The time it takes for Earth to orbit the Sun
B.The distance light travels in a vacuum in one Julian year
C.The speed at which the universe is expanding
D.The brightness of a star as seen from parsecs away
Download the worksheet for Earth and Space - Stars and the Universe to practice offline. It includes additional chapter-level practice questions.