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) the chemistry of living things B) mathematical modeling C) the identification of the composition of materials D) non-carbon related compounds
A) properties, changes, and relationships between energy and matter B) carbon-containing compounds C) crystals and minerals D) the chemistry of living things
A) only to make money B) by accident C) in order go learn basic information D) long after the basis research is complete
A) to solve a particular problem. B) to gain knowledge C) to understand an environmental problem D) to develop new products
A) by accident B) to learn basic information C) to solve a particular problem D) in order to make money
A) mass B) density C) amount of energy D) volume
A) the ability to carry an electric current well and to hold electric charge B) being brittle and hard C) being malleable and ductile D) taking up space and having mass
A) always made of carbon B) the smallest unit of matter that maintains its chemical identity C) the smallest unit of a compound D) smaller than an electron
A) density B) volume C) mass D) weight
A) water vapor B) air C) light D) smoke
A) mass is expressed in pounds B) as the force of Earth's gravity on an object increases, the object's mass increases C) mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance D) mass if often measured with a spring scale
A) cutting B) grinding C) burning D) boiling
A) burning B) rusting C) igniting D) melting
A) equilibria B) products C) synthetics D) reactants |