Primary General Studies: The Solar System And The Movement Of The Earth (Paper 2 (intermediate))

Primary General Studies: The Solar System and the Movement of the Earth (Paper 2 (intermediate))

2026-11-13

Tutor Prep Guide · rotation and revolution, planet order, moon phases and the cause of seasons

Primary General Studies: The Solar System and the Movement of the Earth (Paper 2 (intermediate))

Paper two turns the spin into degrees and time, then uses diameters, light speed and the tilted axis to explain the seasons.

Direct answers　For any per-hour question, write the 15-degree rate first and multiply by the hours; the answer stays on track.

01　Paper details (check answers afterwards)

Item	Detail
Questions	10
Suggested time	20
Difficulty mix	Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1
Chapter	Chapter: Primary General Studies: The Solar System and the Movement of the Earth
Level	parts of a closed circuit, conductors against insulators, series against parallel, adding up battery voltage, and electrical safety

02　Questions (10 items)

FoundationThrough how many degrees does the Earth turn in one hour?
FoundationThrough how many degrees does the Earth turn in six hours?
FoundationRoughly how many times does the Earth spin in one year?
IntermediateHow many days are there in four ordinary years, ignoring leap days?
IntermediateOne cycle of moon phases lasts about 29.5 days. How long are four cycles?
IntermediateThe Earth is about 12,742 km across and the Moon about 3,475 km. How many times wider is the Earth?
ChallengeAbout how long does sunlight take to reach the Earth?
ChallengeBy how many degrees is the Earth tilted on its axis?
ChallengeWhy does the Earth have seasons?
Error redoError clinic: “One spin of the Earth makes one year.” Where is the mistake?

03　Answers and one-line notes

#	Answer	One-line note
1	15 degrees.	360 ÷ 24 = 15, so the Earth turns 15 degrees every hour.
2	90 degrees.	At 15 degrees an hour, 15 × 6 = 90, a quarter of a full turn.
3	About 365 times.	One spin a day for 365 days gives about 365 spins.
4	365 × 4 = 1,460 days.	Four years of 365 days give 1,460; a leap day would make it 1,461.
5	About 118 days.	29.5 × 4 = 118, close to four months.
6	About 3.7 times.	12,742 ÷ 3,475 is about 3.7, so the Earth is far larger than the Moon.
7	About 8.3 minutes.	Light covers the 150 million km in about 500 seconds, roughly 8.3 minutes.
8	About 23.5 degrees.	The axis leans about 23.5 degrees from the vertical, and that lean drives the seasons.
9	Because the tilted axis and the orbit change the angle and length of sunlight through the year.	The lean makes sunlight strike at different angles and for different lengths of time, giving the seasons.
10	One spin makes a day of 24 hours; one orbit makes a year of about 365 days.	The two periods differ about 365 times, so mixing them spoils every question on day, night and seasons.

04　What to do after marking

After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
Repeat the same item two days later; move to the next paper only when both attempts are correct.
Parents only need the answer and note columns; there is no need to explain every item.

Then try paper three, using voltage and current to work out power and resistance.Tutor Registration →

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