2 (Science) 2026 Exam
Questions with 100% Correct
Answers | Latest Update
Matter - ANSWER ✔✔-Anything that has mass and occupies space
-Everything you see and touch is composed of matter
-Three states of matter are solids, liquids, and gases
Solids - ANSWER ✔✔-Characterized by their ability to retain their
shape
-Relatively incompressible
,-Melt when heated and vaporize only slightly
-All substances become solid if cooled sufficiently
Examples: rocks, crystals, wood, feather, ice
Liquids - ANSWER ✔✔-Take on the shape of their containers, yet
cannot be compressed to any significant extent
-The volume of a liquid is constant unless evaporation is occurring
-Liquids when chilled sufficiently, while heat causes liquids to vaporize
-The liquid state is intermediate between the solid and gaseous states
with regard to molecular motion and attractive forces between molecules
Examples: water, oil, milk, honey
Gases - ANSWER ✔✔-Expand to fill any available space
-A gas is a compressible fluid, with its volume determined by the
pressure and temperature of the environment
-A compressed gas pushes out equally in all directions
-Boyle's Law: If the pressure increases, the volume decreases; the
reverse is true as well
,-Charles's Law: As temperature increases (at a fixed pressure), so does
volume
Examples: air, helium, steam
Sublimination - ANSWER ✔✔Makes it possible for some elements
and compounds to transition from a solid to gas phase without becoming
a liquid
Example: a block of dry ice (CO2), which will turn into a gas at room
temperature
Deposition - ANSWER ✔✔Some gases can transition directly to a
solid
Example: the formation of frost
Mass - ANSWER ✔✔-The amount of matter in a chemical substance
-In everyday usage, mass is commonly confused with weight
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, Weight - ANSWER ✔✔-In physics and engineering, weight means
the strength of the gravitational pull on the object (how heavy it is,
measured in newtons)
-In everyday situations, the weight of an object is proportional to its
mass, which usually makes it acceptable to use the same word for both
concepts
Density - ANSWER ✔✔-For a homogeneous object, density is
determined by dividing the mass by the volume (D = M/V)
-The mass is normally measured with an appropriate scale or balance
-The volume may be measured directly (from the geometry of the object)
or by the displacement of a fluid
Example: If steel and wood have equal dimensions, the steel would have
a greater mass as it is more dense
Hardness - ANSWER ✔✔-Refers to various properties of matter in
the solid phase that give it a high resistance to its shape changing when
force is applied
-Hard matter is contrasted with soft matter