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