Second-Grade Science Curriculum Forces and Motion Students will understand the relationship between sound and vibrating objects. Matter: Properties and Change Students will study the changes in properties of solids and liquids. Earth Systems, Structures, and Processes Students will understand the patterns of weather and factors that affect weather. Structures and Functions of Living Organisms Students will build an understanding of animal life cycles. Evolution and Genetics Students will remember that plants and animals differ from, or are similar to, their parents based on the characteristics of the organism.