Which focuses on the composition of matter?

What are the enzymes produced by the esophagus? Is cyclone herculeo a good Beyblade? What is the asteroid that hit planet earth resulting to the extinction of dinosaurs 65 million years ago million years ago? The process by which usable materials are taken into an organism? Is it true that scientists can compare protein structure to determine how closely two species are related? Why do you not gain 450g if you were to eat 450g? Why there is a greater need for information in tourism products than tangible products? What elements threaten our marine ecosystem? Which two tectonic plates are colliding causing the rise of the Andes Mountains? How is toxic waste related to chemistry? Famous filipino physicist and their contribution? What is the highest milligrams the capsule come in? When did Isaac Newton Ragsdale die? What are types of hidden and active viruses? Is spirogyra a unicellar plant? What does increased blood viscosity mean? Is sex hard? Are natural hazards and natural disasters the same? How Pulsed-Field Gel Electrophoresis differences from PCR identification of bacterial strain? How does Solidification occur?

Which focuses on the composition of matter?