CHEM 103 EXAM 1 (UNLV) EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
▪ What is chemistry? - CORRECT-ANSWERS*****The study of composition, structure,
properties, and reactions of matter.
▪ What is matter? - CORRECT-ANSWERS*****All the substances that make up our world
▪ What are the 3 physical states of matter? - CORRECT-ANSWERS*****Solid, Liquid, and
Gas
▪ What is a solid? - CORRECT-ANSWERS*****Has definite shape and volume
▪ What is a liquid? - CORRECT-ANSWERS*****Has definite volume but NO shape
▪ What is a gas? - CORRECT-ANSWERS*****Has NO definite volume OR shape
▪ What are physical properties? - CORRECT-ANSWERS*****Has characteristics that can be
observed OR measured without affecting the identity of a substance.
▪ What are chemical properties? - CORRECT-ANSWERS*****Are those that describe the
ability of a substance to change into a new substance.
▪ Examples of physical properties - CORRECT-ANSWERS*****Shape, Color, melting point,
and physical state.
, ▪ A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these
physical or chemical properties? - CORRECT-ANSWERS*****Physical
▪ What is a physical change? - CORRECT-ANSWERS*****Its state or its appearance will
change but its composite remains the same.
▪ Particle move in random directions but are sufficiently attracted to each other to
maintain a definite volume, although not a rigid structure. - CORRECT-
ANSWERS*****Liquid
▪ Water as a _____takes the ______ of its container. - CORRECT-ANSWERS*****Liquid;
Shape
▪ Strong attractive forces hold particles such as atoms or molecules close together. The
particles are arranged in such a rigid pattern that only vibrate slowly in fixed position. -
CORRECT-ANSWERS*****Solid
▪ What is a chemical change? - CORRECT-ANSWERS*****When an original substance is
converted into 1 or more NEW substances, which has different chemical & physical
properties.
▪ Particles are far apart, have little attraction to each other and move at high speeds,
taking shape and volume of its container. - CORRECT-ANSWERS*****Gas
CORRECT QUESTIONS AND ANSWERS
2025
▪ What is chemistry? - CORRECT-ANSWERS*****The study of composition, structure,
properties, and reactions of matter.
▪ What is matter? - CORRECT-ANSWERS*****All the substances that make up our world
▪ What are the 3 physical states of matter? - CORRECT-ANSWERS*****Solid, Liquid, and
Gas
▪ What is a solid? - CORRECT-ANSWERS*****Has definite shape and volume
▪ What is a liquid? - CORRECT-ANSWERS*****Has definite volume but NO shape
▪ What is a gas? - CORRECT-ANSWERS*****Has NO definite volume OR shape
▪ What are physical properties? - CORRECT-ANSWERS*****Has characteristics that can be
observed OR measured without affecting the identity of a substance.
▪ What are chemical properties? - CORRECT-ANSWERS*****Are those that describe the
ability of a substance to change into a new substance.
▪ Examples of physical properties - CORRECT-ANSWERS*****Shape, Color, melting point,
and physical state.
, ▪ A penny that is round shaped, an orange-red color, a solid and a shiny luster. Are these
physical or chemical properties? - CORRECT-ANSWERS*****Physical
▪ What is a physical change? - CORRECT-ANSWERS*****Its state or its appearance will
change but its composite remains the same.
▪ Particle move in random directions but are sufficiently attracted to each other to
maintain a definite volume, although not a rigid structure. - CORRECT-
ANSWERS*****Liquid
▪ Water as a _____takes the ______ of its container. - CORRECT-ANSWERS*****Liquid;
Shape
▪ Strong attractive forces hold particles such as atoms or molecules close together. The
particles are arranged in such a rigid pattern that only vibrate slowly in fixed position. -
CORRECT-ANSWERS*****Solid
▪ What is a chemical change? - CORRECT-ANSWERS*****When an original substance is
converted into 1 or more NEW substances, which has different chemical & physical
properties.
▪ Particles are far apart, have little attraction to each other and move at high speeds,
taking shape and volume of its container. - CORRECT-ANSWERS*****Gas
