Grade 2 Core Themes, Content Standards and Expected Performances (subject to rotation order)
Content Standards	Expected Performances
Properties of Matter – How does the structure of matter affect the properties and uses of materials? (PHY) 2.1 - Materials can be classified as solid, liquid or gas based on their observable properties. Solids tend to maintain their own shapes, while liquids tend to assume the shapes of their containers, and gases fill their containers fully.	A18 Describe differences in the physical properties of solids and liquids. STC: Solid/Liquid
The Changing Earth – How do materials cycle through the Earth’s systems? (EARTH) 2.3 - Earth materials have varied physical properties which make them useful in different ways. Soils can be described by their color, texture and capacity to retain water. Soils support the growth of many kinds of plants, including those in our food supply.	A21 Sort different soils by properties, such as particle size, color and composition. A22 Relate the properties of different soils to their capacity to retain water and support the growth of certain plants. STC: Soil
Science and Technology in Society – How do science and technology affect the quality of our lives? (BIO) 2.4 - Human beings, like all other living things, have special nutritional needs for survival. The essential components of balanced nutrition can be obtained from plant and animal sources. People eat different foods in order to satisfy nutritional needs for carbohydrates, proteins and fats.	A23 Identify the sources of common foods and classify them by their basic food groups. A24 Describe how people in different cultures use different food sources to meet their nutritional needs.
Structure and Function – How are organisms structured to ensure efficiency and survival? (BIO 1.3 - Organisms change in form and behavior as part of their life cycles. Some organisms undergo metamorphosis during their life cycles; other organisms grow and change, but their basic form stays essentially the same.	A15 Describe the changes in organisms, such as frogs and butterflies, as they undergo metamorphosis. A16 Describe the life cycles of organisms that grow but do not metamorphose. Butterflies