A) any substance that has a definite composition B) any substance that is not alive C) an unnatural additive placed in food D) a toxic substance
A) the identification of the composition of materials B) mathematical modeling C) non-carbon related compounds D) the chemistry of living things
A) properties, changes, and relationships between energy and matter B) crystals and minerals C) the chemistry of living things D) carbon-containing compounds
A) long after the basis research is complete B) only to make money C) in order go learn basic information D) by accident
A) to solve a particular problem. B) to understand an environmental problem C) to gain knowledge D) to develop new products
A) in order to make money B) by accident C) to solve a particular problem D) to learn basic information
A) density B) volume C) mass D) amount of energy
A) taking up space and having mass B) being malleable and ductile C) being brittle and hard D) the ability to carry an electric current well and to hold electric charge
A) always made of carbon B) the smallest unit of a compound C) the smallest unit of matter that maintains its chemical identity D) smaller than an electron
A) volume B) mass C) weight D) density
A) water vapor B) air C) smoke D) light
A) mass if often measured with a spring scale B) mass is expressed in pounds C) mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance D) as the force of Earth's gravity on an object increases, the object's mass increases
A) cutting B) grinding C) boiling D) burning
A) melting B) igniting C) rusting D) burning
A) products B) reactants C) equilibria D) synthetics |