Moon Phases: Sunlight & Viewing Geometry — Drills · Grade 6 Science

Chapter: Earth, Moon, Sun & Space Models

What these drills covers

By the end of Moon Phases: Sunlight & Viewing Geometry you should be able to:

4 questions, multiple choice and written answer, each with a worked explanation.

Vocabulary used: waxing, waning, evidence, system boundary, uncertainty.

Problem 1

Recall the first key distinction: which statement is accurate?
  1. Every ordinary Moon phase is caused by Earth’s shadow.
  2. waxing: An increase in the Moon’s observed illuminated fraction over the phase sequence.
  3. A cloudy missing observation proves the Moon has disappeared.
  4. A sample with missing measurements has proved those values are zero.
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.

Problem 2

Recall the second key distinction: which statement is accurate?
  1. Every ordinary Moon phase is caused by Earth’s shadow.
  2. A cloudy missing observation proves the Moon has disappeared.
  3. waning: A decrease in the Moon’s observed illuminated fraction over the phase sequence.
  4. Repeating any method makes every causal claim true.
Answer and explanation

waning: A decrease in the Moon’s observed illuminated fraction over the phase sequence.

A decrease in the Moon’s observed illuminated fraction over the phase sequence.

Problem 3

Without opening guidance: Why is “Earth’s shadow makes every crescent” incorrect?
Answer and explanation

Most phase positions do not place the Moon in Earth’s shadow. Illumination and viewing direction explain the ordinary sequence.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 4

Without opening guidance: What does the cloudy entry establish?
Answer and explanation

Only that the observation was unavailable or obscured under the method; it does not show the Moon vanished.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

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