Earth, Moon, Sun & Space Models — Chapter quiz · Science 6: Matter, Energy & Earth Systems, Grade 6
How can one system contain different mechanisms, perspectives, and scales? Can one labeled model explain phases, seasons, eclipses, and scale without confusing their mechanisms?
Problem 1
- Gravity stops at the top of the atmosphere.
- orbit: A curved path arising from motion and gravitational interaction around a system.
- A bright reflected object must be a star.
- Every classroom model reproduces reality exactly.
Answer and explanation
orbit: A curved path arising from motion and gravitational interaction around a system.
A curved path arising from motion and gravitational interaction around a system. A is the better basic explanation. Gravity changes the moving satellite’s direction rather than vanish outside the atmosphere. Without the modeled force, its motion would not follow the same curved path around Earth. The drawing still omits precise speed, distance scale, and other influences needed for a full numerical prediction.
Problem 2
Answer and explanation
No. It may emphasize order or relationships. Use labeled diameter data and a stated scale rather than infer real sizes from an unscaled sketch.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 3
- Opposite hemispheric seasons are explained by Earth–Sun distance alone.
- Day and night are caused by Earth completing an orbit each day.
- rotation: A body turning about its axis.
- Every classroom model reproduces reality exactly.
Answer and explanation
rotation: A body turning about its axis.
A body turning about its axis. Summer gives 840 units per area per day and winter 350. Both longer daylight and the larger modeled received rate contribute. These illustrative values explain an energy mechanism, not a guaranteed daily temperature, and real clouds, surface properties, and seasonal response also matter.
Problem 4
Answer and explanation
No. Weather varies within seasons. The geometry concerns a broader illumination pattern, not a guarantee that every summer day is warm.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 5
- Every classroom model reproduces reality exactly.
- Every ordinary Moon phase is caused by Earth’s shadow.
- A cloudy missing observation proves the Moon has disappeared.
- waxing: An increase in the Moon’s observed illuminated fraction over the phase sequence.
Answer and explanation
waxing: An increase in the Moon’s observed illuminated fraction over the phase sequence.
An increase in the Moon’s observed illuminated fraction over the phase sequence. The visible illuminated fraction grows from new toward full and then decreases toward last quarter. About half the Moon remains sunlit throughout; the viewing fraction changes. Eclipses need additional alignment with the tilted orbit, so the full-phase entry does not guarantee Earth’s shadow crosses the Moon.
Problem 6
Answer and explanation
No. Its rotation is coordinated with its orbital motion. A model must include both to explain the familiar facing side.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 7
- tidal range: The difference between high and low water levels using the same reference.
- Every new or full phase must produce an eclipse.
- Ocean tides are caused by the Moon’s shadow.
- Every classroom model reproduces reality exactly.
Answer and explanation
tidal range: The difference between high and low water levels using the same reference.
The difference between high and low water levels using the same reference. The diagram represents a possible solar eclipse if alignment is exact. A’s range is 4.5 m and B’s 2.0 m. Tides involve gravitational effects, not a shadow lifting water. The table is fictional and cannot plan a real shore visit, and an alignment drawing does not guarantee an eclipse at every new phase.
Problem 8
Answer and explanation
No. Full phase supplies the broad Sun–Earth–Moon arrangement, while orbital tilt can prevent the Moon entering Earth’s shadow.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 9
- A diagram that looks realistic must have correct numerical scale.
- scale: A stated ratio connecting represented and actual quantities with units.
- A model with one limitation is useless for every purpose.
- Every classroom model reproduces reality exactly.
Answer and explanation
scale: A stated ratio connecting represented and actual quantities with units.
A stated ratio connecting represented and actual quantities with units. The consistent values are 150 cm to the Sun, 0.384 cm or 3.84 mm to the Moon, and Earth diameter 0.0127 cm or 0.127 mm. The poster’s 2 cm Earth and 10 cm Moon separation do not follow that scale. Label its size and spacing as exaggerated for relationship viewing rather than present it as a numerical distance model.
Problem 10
Answer and explanation
No. It may be useful for illumination geometry if its limits are stated. It should not be used for numerical distance or diameter comparisons without the appropriate scale.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.