Earth and Space Practice Questions
K-12 (Philippines) · K-12 Science · 149 free MCQs with instant results and detailed explanations.
149
Total
44
Easy
75
Medium
30
Hard
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Sample Questions from Earth and Space
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Q1
Easy
What is the primary source of energy for the Earth's climate system?
A.
The Moon
B.
The Sun
C.
Volcanic activity
D.
Geothermal heat
Show Answer & Explanation
Correct Answer: B
The Sun is the primary source of energy that drives the Earth's climate system. It provides the light and warmth necessary for weather patterns and photosynthesis.
Q2
Easy
Which of the following is an effect of the Earth's rotation?
A.
Seasons changing
B.
Day and night cycle
C.
Tides
D.
Earthquakes
Show Answer & Explanation
Correct Answer: B
The Earth's rotation on its axis causes the alternation of day and night. This cycle occurs approximately every 24 hours as different parts of the Earth are exposed to the Sun.
Q3
Easy
What do we call the layer of gases surrounding the Earth?
A.
Hydrosphere
B.
Lithosphere
C.
Atmosphere
D.
Biosphere
Show Answer & Explanation
Correct Answer: C
The layer of gases surrounding the Earth is known as the atmosphere. It is essential for life, providing oxygen and regulating temperature.
Q4
Medium
What layer of the Earth is primarily composed of molten rock and is responsible for the movement of tectonic plates?
A.
Crust
B.
Mantle
C.
Outer Core
D.
Inner Core
Show Answer & Explanation
Correct Answer: B
The mantle is the layer between the crust and the outer core, made of semi-solid rock that flows slowly and enables the movement of tectonic plates, making it crucial for geological activity.
Q5
Medium
Which phenomenon occurs when the Moon passes directly between the Earth and the Sun?
A.
Lunar Eclipse
B.
Solar Eclipse
C.
Tidal Locking
D.
Equinox
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Correct Answer: B
A solar eclipse occurs when the Moon is positioned between the Earth and the Sun, casting a shadow on the Earth and blocking the Sun's light either partially or completely.
Q6
Medium
What is the main cause of the changing seasons on Earth?
A.
Earth's distance from the Sun
B.
Earth's axial tilt
C.
Variations in solar output
D.
Ocean currents
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Correct Answer: B
The axial tilt of the Earth affects how sunlight is distributed over the planet throughout the year, leading to the changing seasons, as different parts of the Earth receive varying amounts of sunlight at different times.
Q7
Medium
If an asteroid is estimated to be 300 kilometers wide and travels at a speed of 25 kilometers per second, how long will it take to cross a distance of 1,000 kilometers?
A.
20 seconds
B.
40 seconds
C.
60 seconds
D.
80 seconds
Show Answer & Explanation
Correct Answer: B
To find the time taken to cross 1,000 kilometers, use the formula: time = distance / speed. Thus, time = 1,000 km / 25 km/s = 40 seconds.
Q8
Hard
Which of the following phenomena best explains the occurrence of seasons on Earth?
A.
The elliptical shape of Earth's orbit around the Sun
B.
The tilt of Earth's axis relative to its orbital plane
C.
The distance of Earth from the Sun during different months
D.
The varying speed of Earth's rotation on its axis
Show Answer & Explanation
Correct Answer: B
The tilt of Earth's axis (approximately 23.5 degrees) is the primary reason for seasonal changes, as it affects the angle and intensity of sunlight received in different regions throughout the year.
Q9
Hard
If a solar eclipse occurs when the Moon completely covers the Sun, what must be the alignment of the Earth, Moon, and Sun?
A.
Earth is between the Moon and the Sun
B.
The Moon is between the Earth and the Sun
C.
The Sun is between the Earth and the Moon
D.
The Earth is tilted towards the Moon
Show Answer & Explanation
Correct Answer: B
During a solar eclipse, the Moon is positioned directly between the Earth and the Sun, blocking sunlight from reaching the Earth and casting a shadow on it.
Q10
Hard
What is the primary factor that leads to the change of seasons on Earth?
A.
The Earth's distance from the Sun
B.
The tilt of the Earth's axis
C.
The Sun's temperature fluctuations
D.
The Earth's rotation speed
Show Answer & Explanation
Correct Answer: B
The tilt of the Earth's axis (approximately 23.5 degrees) is the primary cause of seasonal changes. As the Earth orbits the Sun, different parts receive varying amounts of sunlight throughout the year, leading to changes in temperature and weather patterns associated with the seasons.
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Earth and Space — K-12 (Philippines) K-12 Science Practice Questions Online
This page contains 149 practice MCQs for the chapter Earth and Space in K-12 (Philippines) K-12 Science. The questions are organized by difficulty — 44 easy, 75 medium, 30 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.