What is matter?
Matter is all
around us. Everything that exists is made of matter. Most matter is
made up of tiny particles called atoms.
What are the three states of matter?
On Earth, matter
exists in three states: solid, liquid, and gas.
What is a gas?
A gas has no fixed
volume or shape. Gas particles are widely spaced and the particles
move freely. Gas will expand to fill its container.
What is a liquid?
A liquid has a
definite volume, but no fixed shape. Liquid particles are more
strongly bound compared to gas particles, but more loosely bound
compared to solid particles. A liquid flows and takes the shape of
What is a solid?
A solid has a
fixed shape and volume. Particles in a solid are tightly bound and
packed into regular shapes.
What is material?
Material is a
substance that has very specific properties and is used in the
manufacture of objects.
The properties of
a material are characteristics of the material. For example, wool has
the following properties:
it is warm
- it is soft
- it can be
- it can be spun
into long strands.
Clay has the
it is soft when wet
- it is easily shaped
- it is hard
- it can be made waterproof.
A raw material
comes directly from nature without processing or refining. Examples
of raw materials include:
- some metals.
Many raw materials
undergo processing before they are used in the manufacture of
objects. Examples of materials that are refined or processed:
lumber (processed wood)
(processed wool fleece)
What is an object?
An object is any
item that has been designed and manufactured to serve a specific purpose.
An object is made
from one or more materials. The material(s) from which the object is
made, is selected because of its properties that are suited to the
needs of the finished object. Examples of objects:
Return to Science
questions and answers for kids page.
Link from here for
more information about Professor Beaker's Learning Lab "Characteristics
of Objects and Properties of Materials".