model the Moon's phases with the positions of the Earth, Moon and Sun, and explain why the cycle repeats about every 29.5 days.
10-minute activity
Show today's Moon on the globe. In a dark room, use a lamp as the Sun and hold a ball at arm's length as the Moon, then turn slowly: watch the lit part change. In Australia a waxing Moon is lit on the left. Start the Moon diary to test the model for a week.
Every upcoming eclipse, and how much of the Sun will be covered from your town.
Year 7 · AC9S7U03NSW Stage 4 · SC4-OTU-01
Students will
explain how a total solar eclipse happens, using the 22 July 2028 eclipse over Australia.
10-minute activity
Find the 22 July 2028 eclipse on the tracker: it will be total over Sydney. Model it with a lamp, a globe and a small ball: where does the Moon's shadow fall? Pick your town to see how much of the Sun will be covered there.
explain how the Moon and the Sun cause tides, and predict whether this week's tides are spring or neap tides.
10-minute activity
Check today's phase on the Moon globe. Spring tides (the biggest range) come near new and full Moon, and neap tides (the smallest) near the quarter Moons. Predict this week's tides, then check a tide chart for your nearest beach.
Where the ISS is right now, and how fast it is going.
Year 7 · AC9S7U03
Students will
use the shape of the day and night sides of the Earth to explain the seasons.
10-minute activity
Look at the edge of the night side on the tracker. Is the South Pole in daylight or in darkness today? Which hemisphere is having summer? Explain how the Earth's tilt, not its distance from the Sun, causes the seasons.
Real-time 3D globes of the Moon, Mars and the Sun.
Year 7 · AC9S7U04NSW Stage 4 · SC4-FOR-01
Students will
calculate weight from mass with W = mg, and compare weights on the Earth, the Moon and Mars.
10-minute activity
A 50 kg student weighs about 490 N on the Earth (g = 9.8 N/kg). Work out their weight on the Moon (1.6 N/kg) and on Mars (3.7 N/kg). Then use the worksheet to find how strong gravity is at the space station's height today.
explain that gravity is an unbalanced force that bends a satellite's path into an orbit.
10-minute activity
Watch the satellites move on the globe. Why don't they fly off into space or fall down? Throw a ball: it curves to the ground. Imagine throwing it so fast that the ground curves away as fast as it falls. Use the worksheet to work out how long the space station takes to go round.
Every upcoming rocket launch, and when it lifts off.
Year 8 · AC9S8U05
Students will
describe the energy changes in a rocket launch, from chemical energy in the fuel to kinetic and gravitational potential energy.
10-minute activity
Find the next launch on the schedule and where its rocket is going. Draw an energy flow diagram for the launch: chemical energy in the fuel becomes heat, sound, kinetic energy and gravitational potential energy. Which of these does the rocket actually need?
Every upcoming eclipse, and how much of the Sun will be covered from your town.
Year 7 · AC9S7H01
Students will
explain how new evidence and better measurements changed our ability to predict eclipses.
10-minute activity
Long ago, astronomers could predict roughly when an eclipse might happen. Today the tracker shows each eclipse's path years ahead, to the minute. List what changed: measurements of the Moon's orbit, telescopes, clocks and computers. Which change mattered most?
These are our suggestions for where each tool fits. Always preview a page before using it with a class: some tools show ads, these school pages do not.
Australian Curriculum codes are content descriptions, for example AC9S7U03. NSW syllabus outcomes are a second tag, for example SC4-OTU-01. Victoria and Western Australia have their own codes: the activities still fit.
Know a better fit for your class, or a topic we have missed? Tell us and we will add it.
Share this page with one link: orbitalradar.com/schools/au/years-7-8
Cite this page
Pick a style, then copy it or download it for your reference manager.
Orbital Radar. (2026, November 4). Years 7 and 8: Sun, Earth and Moon. Retrieved November 5, 2026, from https://orbitalradar.com/schools/au/years-7-8
“Years 7 and 8: Sun, Earth and Moon.” Orbital Radar, 4 Nov. 2026, orbitalradar.com/schools/au/years-7-8. Accessed 5 Nov. 2026.
Orbital Radar (2026) Years 7 and 8: Sun, Earth and Moon. Available at: https://orbitalradar.com/schools/au/years-7-8 (Accessed: 5 November 2026).
Orbital Radar. “Years 7 and 8: Sun, Earth and Moon.” Last modified November 4, 2026. https://orbitalradar.com/schools/au/years-7-8.
@misc{orbitalradar_schools_au_years_7_8,
author = {{Orbital Radar}},
title = {Years 7 and 8: Sun, Earth and Moon},
year = {2026},
month = nov,
howpublished = {\url{https://orbitalradar.com/schools/au/years-7-8}},
url = {https://orbitalradar.com/schools/au/years-7-8},
urldate = {2026-11-05},
note = {Accessed 2026-11-05}
}
TY - ELEC
AU - Orbital Radar,
TI - Years 7 and 8: Sun, Earth and Moon
PY - 2026
DA - 2026/11/04
PB - Orbital Radar
UR - https://orbitalradar.com/schools/au/years-7-8
Y2 - 2026/11/05
LA - en-AU
ER -