Front

A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of: Organic, Inorganic, Analytical, Physical

Back

Organic

Front

The smallest unit of matter that retains the properties of that matter is: a molecule, a compound, a mixture, an atom

Back

an atom

Front

Which statement best describes an element? Options: any combination of two or more atoms of different types, a pure substance made up of only one kind of atom, a substance containing only carbon atoms, any kind of crystal

Back

a pure substance made up of only one kind of atom

Front

Which of the following changes is a physical change of matter? Options: water evaporating, paper burning, a nail rusting, a silver spoon tarnishing

Back

water evaporating

Front

Which of the following changes is a chemical change of matter? Options: ice melting to produce water, vinegar combining with baking soda to produce carbon dioxide, water boiling to produce water vapor, liquid silica solidifying to form glass

Back

vinegar combining with baking soda to produce carbon dioxide

Front

Which of the following is an example of a heterogeneous mixture? Options: tap water, chunky peanut butter, orange-colored sugar water, gold ring

Back

chunky peanut butter

Front

Which of the following is a pure substance? Options: air, granite, water, stainless steel

Back

water

Front

The horizontal rows of the periodic table are called

Back

periods

Front

Which of these recorded observations is qualitative, rather than quantitative? Options: A chemical reaction is complete in 2.3 s., The solid has a mass of 23.4 g., The compound melts at 87.5C., Iron is denser than aluminum.

Back

Iron is denser than aluminum.

Front

Which of these statements is true of the scientific method?

Back

The steps may vary somewhat to suit the experiment.