Designed for U.S. K-12 classrooms. Each worksheet includes instructions, exercises and an Answer Key, ready to print. Use them with the eight projects and lesson plans on the Education page or as stand-alone activities.
WS-1 · Solar System Data Detective (Grades 5–8)
Instructions: Use the table below to organize data for the eight planets and answer the pattern questions. You may use textbooks or the Launches/Data pages on this site.
Task A: Sort the planets from closest to farthest from the Sun: Neptune / Mercury / Mars / Venus / Earth / Saturn / Jupiter / Uranus → ______
Task B: Fill in the table (diameter in km, distance in AU, year length in Earth years/days):
| Planet | Diameter (km) | Distance (AU) | Year length | Rotation (day) |
|---|---|---|---|---|
| Mercury | ||||
| Venus | ||||
| Earth | 12,756 | 1.00 | 365 d | 24 h |
| Mars | ||||
| Jupiter | ||||
| Saturn | ||||
| Uranus | ||||
| Neptune |
Task C (Pattern Questions):
1. Which two planets differ most in diameter? 2. Between which two planets is the boundary between terrestrial and giant planets? 3. Which planet has a "year" shorter than its "day"? Why is that unusual?
Answer Key
- Task A: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
- Task B: Mercury 4,879 / 0.4 / 88 d / 59 d; Venus 12,104 / 0.7 / 225 d / 243 d (retrograde rotation); Mars 6,792 / 1.5 / 687 d / 24.6 h; Jupiter 142,984 / 5.2 / 12 yr / 9.9 h; Saturn 120,536 / 9.5 / 29 yr / 10.7 h; Uranus 51,118 / 19.2 / 84 yr / 17.2 h (tilted rotation); Neptune 49,528 / 30.1 / 165 yr / 16.1 h
- Task C: 1) Jupiter and Mercury (about 142,984 vs. 4,879 km); 2) Between Mars and Jupiter (the asteroid belt is also here); 3) Venus: its rotation of 243 days is longer than its 225-day orbit, and the direction is opposite.
WS-2 · Rocket Math Challenge (Grades 9–12)
Instructions: Use with the Rocket Science Basics lesson. Constants: g₀ = 9.81 m/s², ln 12 ≈ 2.485, ln 8.4 ≈ 2.13.
- Engine mass flow ṁ = 250 kg/s, exhaust velocity ve = 3,000 m/s. Find thrust in N and kN.
- Specific impulse Isp = 300 s. Convert to effective exhaust velocity ve = Isp·g₀.
- Use the Tsiolkovsky rocket equation to find Δv: Isp = 300 s, m₀/mf = 12.
- Concept question: Orbital speed is about 7.8 km/s. Why is the ascent delta-v budget about 9.4 km/s?
- With a hydrolox engine Isp of 450 s, what mass ratio is needed to reach the 9.4 km/s budget? (Hint: about 8.4)
Answer Key
1. F = ṁ·ve = 250 × 3,000 = 750,000 N = 750 kN
2. ve = 300 × 9.81 ≈ 2,943 m/s
3. Δv = 2,943 × ln 12 ≈ 2,943 × 2.485 ≈ 7,310 m/s ≈ 7.3 km/s
4. Gravity and aerodynamic losses consume an extra ~1.5–2 km/s during ascent; the budget covers the entire trajectory, not just final velocity.
5. m₀/mf = e^(9,400 / (450×9.81)) = e^2.13 ≈ 8.4, which shows that high specific impulse greatly reduces the required mass ratio.
WS-3 · Water Rocket Flight Log (Grades 5–12)
Instructions: Use with the Water Rocket Challenge project. Record one row per flight. Change only one variable at a time and observe the result.
| Flight | Water (mL) | Pressure (per kit spec) | Fin design | Nose cone | Apoapsis height (m) | Stable? (Y/N) | What I changed |
|---|---|---|---|---|---|---|---|
| 1 | baseline | ||||||
| 2 | |||||||
| 3 | |||||||
| 4 |
Analysis Questions: 1) Where is the peak in the water-volume-vs.-height relationship? 2) How does the rocket behave without fins? Explain using center of gravity/center of pressure. 3) Which variable will you change next? Why change only one at a time?
Answer Key (key points): 1) Usually about one-third full; 2) Unstable tumbling: the center of pressure is ahead of the center of gravity; fins move the center of pressure backward; 3) Control variables; iterate one at a time.
WS-4 · Earth's Patterns (Grades K–5)
Task A (Circle the answer): Earth rotates once in (24 hours / a month). Day and night alternate because of (Earth's rotation / the Sun orbiting Earth).
Task B (Match): Spring → flowers bloom; Summer → longest days; Autumn → leaves fall; Winter → shortest days (Northern Hemisphere).
Task C (Draw): Draw a simple Earth-Sun diagram and label the day side and night side.
Task D: Write one environmental-protection action you can do at home.
Answer Key: 24 hours; Earth's rotation; Seasons come from Earth's ~23.5° axial tilt changing the Sun's direct angle; D is open-ended (e.g., turn off lights, sort trash).
WS-5 · Space Vocabulary Match (Grades K–5)
Match: orbit / gravity / rover / satellite / telescope / launch pad
Definitions: A. where rockets lift off B. the path of one revolution around a celestial body C. the force that pulls apples to the ground D. a robot that drives on a planet's surface E. a tool that helps us see distant objects clearly F. a human-made craft that orbits Earth
Answer Key: orbit–B, gravity–C, rover–D, satellite–F, telescope–E, launch pad–A
WS-6 · A Day on the ISS (Grades 6–10)
Task A: The International Space Station orbits at about 400 km altitude and ~7.7 km/s. One orbit takes about __ minutes; astronauts see about ____ sunrises each day.
Task B: Design a 24-hour schedule for an astronaut (include why 2 hours of exercise are needed).
Task C (Short answer): Without exercise, about how much bone density do astronauts lose per month? The space station recycles more than what percentage of water?
Answer Key: About 92 minutes; about 16 times; bone density up to ~1% per month; water recycling over 90% (from cabin humidity and even urine).
WS-7 · Telescope Observation Log (Grades 6–10, pairs with Make Your Own Telescope)
Pre-observation Checklist (check):
- [ ] Never point the telescope at the Sun or near the Sun (solar viewing requires a filter compliant with ISO 12312-2)
- [ ] Choose an open spot away from streetlights; - [ ] Move the telescope outside 30 minutes early to acclimate to the temperature
- [ ] Logbook and red flashlight ready (red light preserves night vision)
Observation Log:
| Date / Time | Object | Sky conditions (clear/hazy/cloud) | What I saw | Sketch |
|---|---|---|---|---|
| Moon (current phase: ____) | ||||
| Jupiter (the four Galilean moons near Jupiter) | ||||
| Saturn (ring visibility) | ||||
| Orion Nebula (M42) | ||||
| Pleiades (M45) |
Discussion Question: Objective focal length 400 mm, eyepiece focal length 20 mm. Magnification = objective focal length ÷ eyepiece focal length = ______.
Answer Key: 400 ÷ 20 = 20×. Galileo first pointed a telescope at the sky in 1609–1610 and saw Jupiter's four large moons, the same sight you see in the eyepiece.
WS-8 · Rover & Satellite Design Sheet (Grades 5–12, pairs with Build a Mars Rover / DIY Satellite Model)
Task: Complete a design sheet for either a "rover" or a "1U CubeSat" (choose one or do both).
Part A · System List (check and list your choices): Power (solar panel / RTG nuclear battery; note: Perseverance and Curiosity use MMRTG; early Mars rovers used solar panels), communications antenna, mobility structure (wheel count/rocker-bogie), science payload.
Part B · Mass Budget Table:
| Subsystem | Your budget (g) | Real-world reference |
|---|---|---|
| Structure | Perseverance rover totals about 1 metric ton (including chassis and arm) | |
| Power | 1U CubeSat ≈ 10 cm cube, about 1.3 kg | |
| Science payload | ||
| Total | Your design must not exceed 500 g |
Part C · Iteration Log: After each test, write one line: what you changed, why, and the result (at least 3 rounds).
Part D · Short Answer: One-way communication delay between Earth and Mars ranges from about 3 to 22 minutes. What does this mean for remotely controlling a Mars rover? Why does Perseverance need autonomous navigation?
Answer Key (key points): The delay makes real-time control impossible; commands are sent in batches. Therefore the rover must autonomously avoid obstacles and plan paths, then safely wait for the next communications window.
Content-to-Worksheet Mapping (8 items × 6 worksheets)
| Content slug | Worksheets |
|---|---|
| build-a-mars-rover | WS-8 |
| make-your-own-telescope | WS-7 |
| diy-satellite-model | WS-8 |
| water-rocket-challenge | WS-3 |
| the-solar-system | WS-1 |
| rocket-science-basics | WS-2 |
| life-in-space | WS-6 |
| our-amazing-earth | WS-4 |
Data sources: Planetary data are consistent with the NASA Planetary Fact Sheet (nssdc.gsfc.nasa.gov/planetary/factsheet/, rounded). ISS and Mars-rover figures are based on NASA public materials. Printing tip: A4 landscape; print answer pages separately.