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