methyl orange: an azo dye used as an acid-base indicator; used for titrations involving weak bases
matter: that which has mass and occupies space
bristlecone pine: small slow-growing upland pine of western United States (Rocky Mountains) having dense branches with fissured rust-brown bark and short needles in bunches of 5 and thorn-tipped cone scales; among the oldest living things some over 4500 years old