What are the building blocks of all matter? 2. Which gives shape and support to the human body? 3. Which food group provides the best source of carbohydrates. 4. The organ that holds solid waste materials before they are passed from the body is the a. Pancreas b. Liver c. Stomach d. Large intestine 5. Which are not found in both birds and insects. 6. A fish is dark on the top and light on the bottom because a. the colors help the fish swim better. b. the sun makes the top part of the fish turn dark. c. the color make the fish harder for a predator to see. d. the colors keep the fish from turning upside down. All of the following except one are made up of atoms. Which one is not made up of atoms? a. energy b. people c. gasoline d. sodium chloride