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