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