Glossary: Terms Starting with I
47 definitions in Science with links to the lessons that teach each word.
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ice giant
ScienceFrom Grade 5
a planet rich in water, ammonia and methane ices
Learn it in: Outer planets (Grade 5)
igneous
ScienceFrom Grade 3
rock formed from cooled melted rock
Learn it in: Rocks (Grade 3), Rock formation introduction (Grade 4)
immune system
ScienceFrom Grade 6
the body’s defence against germs
Learn it in: Disease prevention (Grade 6)
impermeable
ScienceFrom Grade 3
not letting water in
Learn it in: Rock properties (Grade 3), Rock properties (Grade 4)
improve
ScienceFrom Grade 2
to make better
Learn it in: Tools and technology (Grade 2), Solving community problems (Grade 2), Drawing conclusions (Grade 3)
improvement
ScienceFrom Grade 4
a change that would make a test better
Learn it in: Evaluating investigations (Grade 4), Investigation evaluation (Grade 5)
incident ray
ScienceFrom Grade 4
light coming in
Learn it in: Reflection (Grade 4), Reflection (Grade 6)
inclined plane
ScienceFrom Grade 4
a slope used to move loads up or down
Learn it in: Inclined planes (Grade 4)
incubate
ScienceFrom Grade 2
to keep eggs warm so chicks develop
Learn it in: Chicken life cycle (Grade 2)
independent
ScienceFrom Grade 6
not depending on others
Learn it in: Parallel circuits introduction (Grade 6)
independent variable
ScienceFrom Grade 3
the thing we change
Learn it in: Planning investigations (Grade 3), Force investigations (Grade 3), Identifying variables (Grade 4)
inertia
ScienceFrom Grade 6
the tendency of an object to keep its motion
Learn it in: Practical applications (Grade 6)
infectious
ScienceFrom Grade 6
able to spread from person to person
Learn it in: Disease prevention (Grade 6)
infiltration
ScienceFrom Grade 3
water soaking into the ground
Learn it in: Water movement through soil (Grade 3), Water cycle (Grade 5)
insect
ScienceFrom Grade 1
a small animal with six legs, such as a bee
Learn it in: Flowers (Grade 1), Insects (Grade 3), Invertebrates (Grade 6)
instrument
ScienceFrom Grade 1
something used to make music
Learn it in: Sources of sound (Grade 1), Weather instruments (Grade 2)
insulation
ScienceFrom Grade 4
a covering that stops electricity escaping
Learn it in: Wires (Grade 4), Heating and cooling (Grade 4), Heat energy (Grade 5)
insulator
ScienceFrom Grade 4
a material that blocks sound or heat
Learn it in: Sound absorption (Grade 4), Conductors and insulators (Grade 4), Materials for construction (Grade 4)
insulator (heat)
ScienceFrom Grade 6
a material that reduces heat flow
Learn it in: Heat transfer (Grade 6)
interaction
ScienceFrom Grade 5
working together or affecting each other
Learn it in: Interactions among body systems (Grade 5)
interdependence
ScienceFrom Grade 4
living things relying on each other
Learn it in: Interdependence (Grade 4), Organisation of living systems (Grade 6)
interdependent
ScienceFrom Grade 3
depending on each other
Learn it in: Ecosystems introduction (Grade 3)
invertebrate
ScienceFrom Grade 3
an animal without a backbone
Learn it in: Vertebrates and invertebrates (Grade 3), Invertebrates (Grade 6)
investigable
ScienceFrom Grade 2
able to be answered by a test or observation
Learn it in: Asking investigable questions (Grade 2)
investigate
ScienceFrom Grade 1
to find out by looking and trying
Learn it in: Asking scientific questions (Grade 1), Scientific questions (Grade 6)
investigation
ScienceFrom Grade 1
a way of finding out an answer by looking carefully
Learn it in: What plants need to grow (Grade 1), Planning investigations (Grade 3), Force investigations (Grade 3)
irreversible
ScienceFrom Grade 2
cannot change back
Learn it in: Science in cooking (Grade 2), Reversible changes (Grade 4)
irreversible change
ScienceFrom Grade 5
a change that cannot be undone
Learn it in: Reversible and irreversible changes (Grade 5)
iterate
ScienceFrom Grade 5
to repeat and improve
Learn it in: The engineering design process (Grade 5)
iteration
ScienceFrom Grade 5
one round of design, test and improve
Learn it in: Engineering improvements (Grade 5), Improving designs (Grade 6)