Mission Control Guide
Mission Control Guide
Red Planet Weight: Gravitational Calculations
Grades 5-8
Lesson Objective
Students will calculate weight differences between Earth and Mars based on gravitational pull and explain how mass and size influence a planet's surface gravity.
Materials Needed
- Yardsticks or tape measures
- Masking tape (for floor)
- Martian Math Worksheet
- Calculators
Vocabulary
Gravity: The force that pulls objects toward each other.
Mass: The amount of matter in an object.
Weight: The measure of the force of gravity on an object.
Mission Timeline
5 MIN
The Jump Test
Have students perform a vertical jump next to a wall. Use masking tape to mark the peak. Key Question: "If you could jump 10 inches here, would you jump higher or lower on Mars?"
10 MIN
Visual Evidence
Watch segment 5:50-6:44 of the video. Focus on the relationship between size, mass, and pull. Discuss why Mars has only 38% gravity despite being half Earth's size (it has significantly less mass/density).
20 MIN
Martian Math Activity
Students use the conversion factor (Weight × 0.38) to complete their worksheets. Circulation Tip: Watch for decimal placement in calculations.
10 MIN
Astronaut Reflection
Discuss the physiological impact. Pros: Easier to move heavy equipment. Cons: Muscle atrophy and bone density loss over time.
Martian Math Quick-Check
Standard Backpack (20 lbs) 7.6 lbs
Medium Car (4,000 lbs) 1,520 lbs
Liter of Water (1 kg) 0.38 kg
Astronaut in Suit (300 lbs) 114 lbs
Support
Provide a multiplication table or pre-calculate the "Earth Weight × 0.3" estimate first to check for reasonableness.
Extension
Ask students to calculate the "Jump Ratio." If gravity is 38%, they would jump approx. 2.6x higher (1 / 0.38).
Martian Math Worksheet
Official Mission Log
MARTIAN MATH
Gravitational Analysis Phase 1
Explorer Name:
Mission Date:
Phase 1: The Jump Test
Earth Peak Height (inches):
Mars Prediction:
Jump Higher
Jump Lower
MISSION DATA DOWNLOAD
Mars is half the size of Earth and has significantly less mass. Because of this, its gravitational pull is much weaker. Gravity on Mars is only 38% of Earth's gravity.
Phase 2: Weight Conversion
CONVERSION FORMULA:
Earth Weight × 0.38 = Mars Weight
| Mission Object | Earth Weight | Calculation Space | Mars Weight |
|---|
| You (Explorer) | Record Earth weight | | |
| Full Supply Pack | 20 lbs | | |
| Exploration Rover | 4,000 lbs | | |
| 1L Water Storage | 1 kg | | |
Phase 3: Mission debrief
How would having a lower weight help an astronaut working on the surface of Mars?
Why might low gravity be a challenge or a danger for humans living on Mars for a long time?
SYSTEM STATUS: NOMINAL // MARS GRAVITY VERIFIED
Red Planet Slides
RED PLANET WEIGHT
Mission: Gravitational Analysis
THE JUMP TEST
1
Find a space by a wall.
2
Jump as high as you can and mark your peak with tape.
3
Measure your "Earth Jump" in inches.
PREDICTION
If you performed this jump on Mars, would you jump higher or lower?
VISUAL DATA LOG
Embedded media
OBSERVATION GOAL
Watch closely: How does Mars's mass affect its gravity compared to its size?
Time Segment: 5:50 - 6:44
WHY ONLY 38%?
EARTH
Large size + High mass = Strong Pull
MARS
Small size + Lower mass = Weaker Pull
38% OF EARTH GRAVITY
Mars is half the size of Earth, but has only 11% of Earth's total mass!
THE MARTIAN FORMULA
To find your weight on Mars:
Weight on Earth
×
0.38 Gravity Ratio
=
Result Weight on Mars
Grab your worksheet!
MISSION DEBRIEF
THE ADVANTAGES
How would weighing less make construction or exploration easier for humans on Mars?
THE RISKS
What might happen to human bones and muscles if they stay in 38% gravity for many years?
"Mars currently holds the most promise for a future crewed mission."
