Standard 05 Students will analyze objects in terms of the materials of which they are made. In this section, students continue to learn about states of matter. In the first grade, they learned about states of matter by studying water as a solid, liquid, and gas. They also learn about physical properties of various materials such as weight, texture, flexibility, size, and shape. They explore the effects of physical changes by cutting, bending, heating, freezing, and so on.
Students learn to compare and contrast.
For example, they compare the sizes and weights of various objects, sometimes finding that larger objects may weigh less than smaller objects. Matter is found all around us. From stars to dust, plants to animals, all things in our world and universe are made up of matter. Some forces move matter, such as heat and sound. Some forms of energy are closely related to matter, yet are usually not considered matter, such as light, radio waves, and X-rays.