Glossary: Terms Starting with W
45 definitions in Science with links to the lessons that teach each word.
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warm-blooded
ScienceFrom Grade 3
keeping a steady warm body temperature
Learn it in: Mammals (Grade 3), Vertebrates (Grade 6)
waste
ScienceFrom Grade 1
things we throw away
Learn it in: Waste (Grade 1), Water conservation (Grade 2), Energy conservation (Grade 2)
wasted energy
ScienceFrom Grade 5
energy not used for the wanted job
Learn it in: Energy transformation (Grade 5), Energy transfer (Grade 6)
water
ScienceFrom Grade 1
what plants take in through their roots
Learn it in: What plants need to grow (Grade 1), What is water? (Grade 2)
water cycle
ScienceFrom Grade 5
the continuous movement of water on, above and below Earth
Learn it in: Water cycle (Grade 5)
water resistance
ScienceFrom Grade 3
water pushing back on a moving object
Learn it in: Contact forces (Grade 3)
water vapour
ScienceFrom Grade 3
water as an invisible gas
Full explanation with examples and practice →
Learn it in: Evaporation (Grade 3), Evaporation (Grade 4), Evaporation and condensation (Grade 5)
waterlogged
ScienceFrom Grade 3
soaked so no air remains
Learn it in: Water movement through soil (Grade 3)
waterproof
ScienceFrom Grade 1
not letting water through
Learn it in: Plastic (Grade 1), Choosing materials for different purposes (Grade 1), Solid materials (Grade 2)
wave
ScienceFrom Grade 6
a pattern of vibration that carries energy
Learn it in: Sound propagation (Grade 6)
weakness
ScienceFrom Grade 5
a part that fails or is weakest
Learn it in: Improving solutions (Grade 5)
weather
ScienceFrom Grade 1
what the air outside is like: sunny, rainy, windy or cloudy
Learn it in: Science in everyday life (Grade 1), What is weather (Grade 1), Daily weather observations (Grade 2)
weathering
ScienceFrom Grade 3
slow breaking of rock into smaller pieces
Learn it in: Soil (Grade 3), Weathering (Grade 4)
wedge
ScienceFrom Grade 2
a pointed piece that splits or cuts
Learn it in: Simple machines in everyday life (Grade 2), Inclined planes (Grade 4)
weed
ScienceFrom Grade 1
a plant growing where it is not wanted
Learn it in: Caring for plants (Grade 1)
weight
ScienceFrom Grade 3
the pull of gravity on an object
Learn it in: Gravity (Grade 3), Gravity (Grade 5), Gravity (Grade 6)
well
ScienceFrom Grade 2
a deep hole dug to reach underground water
Learn it in: Water sources (Grade 2)
wet season
ScienceFrom Grade 3
the part of the year with lots of rain
Learn it in: Seasonal patterns (Grade 3)
wheel
ScienceFrom Grade 2
a round object that turns
Learn it in: Wheels and axles (Grade 2), Wheels and axles (Grade 4)
wild
ScienceFrom Grade 1
growing naturally, not planted by people
Learn it in: Plants in our environment (Grade 1), Domestic and wild animals (Grade 1), Animal care (Grade 2)
wildlife corridor
ScienceFrom Grade 6
a strip of habitat linking protected areas
Learn it in: Conservation (Grade 6)
wind
ScienceFrom Grade 1
air that is moving
Learn it in: Windy weather (Grade 1), Wind (Grade 2), Wind direction (Grade 3)
wind turbine
ScienceFrom Grade 5
a machine that turns wind into electricity
Learn it in: Energy applications (Grade 5)
wind vane
ScienceFrom Grade 2
a tool that shows wind direction
Learn it in: Wind (Grade 2), Weather instruments (Grade 2), Wind direction (Grade 3)
windpipe
ScienceFrom Grade 3
the tube air passes down
Learn it in: The lungs (Grade 3), Respiratory system (Grade 5)
windsock
ScienceFrom Grade 1
a cone that shows the direction of the wind
Learn it in: Windy weather (Grade 1)
wing
ScienceFrom Grade 1
a body part many birds and insects use to fly
Learn it in: Animal body parts (Grade 1), Seed dispersal (Grade 2), Seed dispersal (Grade 3)
wonder
ScienceFrom Grade 1
to want to know about something
Learn it in: Asking scientific questions (Grade 1)
wood
ScienceFrom Grade 1
the hard material that comes from trees
Learn it in: Uses of plants (Grade 1), Wood (Grade 1)
work
ScienceFrom Grade 4
force moved over a distance
Learn it in: Mechanical advantage introduction (Grade 4)