HS-ESS1-7
Construct an explanation using evidence to support the claim that the phases of the moon, eclipses, tides and seasons change cyclically.
Clarification statement: Emphasis of the explanation should include how the relative positions of the moon in its orbit, Earth, and the Sun cause different phases, types of eclipses or strength of tides. Examples of evidence could include various representations of relative positions of the Sun, Earth and moon.
Assessment boundary: Assessment does not include mathematical computations to support explanations but rather relies on conceptual modeling using diagrams to show how celestial bodies interact to create these cyclical changes.
Note: this is a NYSED-specific performance expectation that is different from the Next Generation Science Standards.
Resources
Examples and discussion of resources for the learning, teaching, and assessment of HS-ESS1-7.

Assessment
What assessment of HS-ESS1-7 might look like on a NY state exam.

NGSS Dimensions
Performance expectation HS-ESS1-7 was developed using the following elements from the NRC document A Framework for K-12 Science Education:
- Constructing explanations and designing solutions: Construct an explanation based on valid and reliable evidence obtained from a variety of sources (including students’ own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the natural world operate today as they did in the past and will continue to do so in the future.
- Earth and the solar system: Earth and celestial phenomena can be described by principles of relative motion and perspective.
- Patterns: Different patterns may be observed at each of the scales at which a system is studied and can provide evidence for causality in explanations of phenomena.