Grade 9 Physics Quiz

What are the distinguishing properties of solids, liquids, and gases?

• Solids have definite shape but not volume, liquids have definite volume but not shape, gases have neither definite shape nor volume

• Solids have definite shape and volume, liquids have definite volume but not shape, gases have neither definite shape nor volume

• Solids have neither definite shape nor volume, liquids have definite shape and volume, gases have definite volume but not shape

• Solids have definite shape and volume, liquids have neither definite shape nor volume, gases have definite volume but not shape

How can the molecular structure of solids, liquids, and gases be described?

• Solids have closely packed molecules with moderate motion, liquids have widely spaced molecules with high motion, gases have loosely packed molecules with little motion

• Solids have widely spaced molecules with high motion, liquids have closely packed molecules with little motion, gases have loosely packed molecules with moderate motion

• Solids have closely packed molecules with high motion, liquids have widely spaced molecules with moderate motion, gases have loosely packed molecules with little motion

• Solids have closely packed molecules with little motion, liquids have loosely packed molecules with moderate motion, gases have widely spaced molecules with high motion

How can evaporation be described in terms of the escape of more-energetic molecules from the surface of a liquid?

• Evaporation occurs when less-energetic molecules escape from the surface of a liquid

• Evaporation occurs when molecules escape from the surface of a gas

• Evaporation occurs when molecules escape from the interior of a liquid

• Evaporation occurs when more-energetic molecules escape from the surface of a liquid

What is the equation for pressure?

• p = F * A

• p = F / A

• p = F + A

• p = F - A

How is pressure related to force and area?

• Pressure is directly proportional to area and inversely proportional to force

• Pressure is directly proportional to both force and area

• Pressure is directly proportional to force and inversely proportional to area

• Pressure is inversely proportional to both force and area

From where is the energy obtained for electricity or other useful forms of energy?

• Chemical energy stored in fuel

• Chemical energy stored in water

• Chemical energy stored in air

• Chemical energy stored in soil

What is the source of energy for all our energy resources except geothermal, nuclear, and tidal?

• Earth

• Sun

• Water

• Wind

What is the process by which energy is released in the Sun?

• Chemical reaction

• Combustion

• Nuclear fission

• Nuclear fusion

What is the equation for the simple kinetic molecular model of matter?

• p = F + A

• p = F * A

• p = F / A

• p = hρg

How can the pressure beneath a liquid surface be related to depth and density?

• Pressure is directly proportional to density and inversely proportional to depth

• Pressure is directly proportional to both depth and density

• Pressure is inversely proportional to both depth and density

• Pressure is directly proportional to depth and inversely proportional to density