What time of year do these changes take place?

NGSS Science and Engineering Practices. 4 – Analyzing and Interpreting Data. K-2. Use observations (firsthand or from media) to describe patterns and/or relationships in the natural and designed world(s) in order to answer scientific questions and solve problems.

NGSS Crosscutting Concepts. 7 – Stability and Change. K-2. Some things stay the same while other things change.