It is a written text sample for Grade 5 Science

1. Three Phases of Matter
Grade 5
Guide Question:
What is Solid, Liquid, Gas?
Give examples each of the phases of matter.
Differentiate the arrangement of molecules of the three phases of matter.
Matter is anything that has mass and takes up space. Matter is composed of
tiny building blockscalled molecules. Molecules arefurthercomposedof the tiniest
parts of matter called atoms.
A solid is a kind of matter that has a fixed shape and a fixed volume. Your
pencil is a solid. The shape and volume of your pencil will not change if you move
the pencil from place to place. The fixed, closely packed arrangement of particles
causesa solid to havea definite shapeand volume.Solid possessthecharacteristics
of being hard and tough. The hardness of solid is due to the arrangement of its
molecules. The molecules of a solid ice are close to each other, leaving no spacein
between. This true to all solid materials.
A liquid is a kind of matter that has a fixed volume. However, the shapeof a
liquid changes with the shape of its container. A liquid is a kind of matter that has
a fixed volume. However, the shape of a liquid changes with the shape of its
container.
A gas is a kind of matter that easily changes volume and shape. Air is a gas.
When you blow air into a balloon, the air takes the shapeof the balloon. When you
let the air out of the balloon, the particles spread out into the room. Gas particles
can move around freely. Gas particles can either spread apart or be squeezed
together. Gas permits materials to pass through it readily because of its spacious
molecular arrangement. The oxygen that all living things breathe, the carbon
dioxide that your lungs exhale, and even the helium gas that enables a balloon to
float are all examples of gases.