Glossary: Terms Starting with G
45 definitions in Science with links to the lessons that teach each word.
Showing Science only. Show all subjects
galaxy
ScienceFrom Grade 6
a huge group of stars, gas and dust
Learn it in: Earth in the Solar System (Grade 6)
garden
ScienceFrom Grade 1
a place where plants are grown
Learn it in: Living things in our surroundings (Grade 1)
garden habitat
ScienceFrom Grade 2
a garden that provides homes for wildlife
Learn it in: Human effects on habitats (Grade 2)
gas
ScienceFrom Grade 2
matter that spreads out, such as air
Learn it in: What is matter? (Grade 2), Gases (Grade 3), Solids, liquids, and gases (Grade 5)
gas exchange
ScienceFrom Grade 5
swapping oxygen for carbon dioxide
Learn it in: Respiratory system (Grade 5), The respiratory system (Grade 6)
gas giant
ScienceFrom Grade 5
a huge planet made mostly of hydrogen and helium
Learn it in: Outer planets (Grade 5)
generator
ScienceFrom Grade 4
a machine that makes electricity
Learn it in: Electrical energy sources (Grade 4)
geosphere
ScienceFrom Grade 5
the solid Earth of rock and soil
Learn it in: Earth’s major systems (Grade 5)
germ
ScienceFrom Grade 1
a tiny living thing that can make us ill
Learn it in: Drinking clean water (Grade 1), Healthy habits (Grade 3)
germinate
ScienceFrom Grade 3
to start to grow from a seed
Learn it in: Plant growth requirements (Grade 3)
germination
ScienceFrom Grade 2
when a seed starts to grow
Learn it in: Seed germination (Grade 2), Plant growth (Grade 5)
germs
ScienceFrom Grade 1
tiny things that can make us ill
Learn it in: Personal hygiene (Grade 1), Clean water (Grade 2)
giant impact hypothesis
ScienceFrom Grade 6
the idea that a Mars-sized body hit Earth to form the Moon
Learn it in: The Moon (Grade 6)
gills
ScienceFrom Grade 2
parts that let a tadpole breathe in water
Learn it in: Frog life cycle (Grade 2), Fish (Grade 3), Vertebrates (Grade 6)
glossary
ScienceFrom Grade 6
a list of terms with meanings
Learn it in: Scientific vocabulary review (Grade 6)
gnomon
ScienceFrom Grade 4
the stick that casts a sundial shadow
Learn it in: Shadows during the day (Grade 4)
goal
ScienceFrom Grade 6
something you want to achieve
Learn it in: Final Grade 6 mastery assessment (Grade 6)
grain
ScienceFrom Grade 1
the lines in wood
Learn it in: Wood (Grade 1), Plant food production (Grade 5)
graph
ScienceFrom Grade 2
a picture of data
Learn it in: Organising observations (Grade 2), Weather graphs (Grade 3)
gravitational field strength
ScienceFrom Grade 6
the force per kilogram, g
Learn it in: Gravity (Grade 6)
gravity
ScienceFrom Grade 1
the force that pulls things down towards the ground
Learn it in: Everyday examples of forces (Grade 1), Gravity (Grade 3), The Moon (Grade 4)
greenhouse gas
ScienceFrom Grade 5
a gas that traps heat in the atmosphere
Learn it in: Human effects on Earth systems (Grade 5), Greenhouse effect introduction (Grade 6), Earth and space review (Grade 6)
grip
ScienceFrom Grade 1
how well something holds
Learn it in: Movement on different surfaces (Grade 1), Friction (Grade 2), Friction (Grade 3)
groundwater
ScienceFrom Grade 3
water stored under the ground
Learn it in: Water movement through soil (Grade 3), Hydrosphere (Grade 5)
group
ScienceFrom Grade 1
things that go together
Learn it in: Sorting and grouping objects (Grade 1), Organising observations (Grade 2), Classifying animals (Grade 3)
grow
ScienceFrom Grade 1
to get bigger and change
Learn it in: Characteristics of living things (Grade 1), Growth and change (Grade 1), Seedling growth (Grade 2)
growth spurt
ScienceFrom Grade 6
a period of rapid growth
Learn it in: Puberty and physical development (Grade 6)
guard cell
ScienceFrom Grade 5
a cell that opens and closes a stoma
Learn it in: Gas exchange introduction (Grade 5)
guess
ScienceFrom Grade 2
an idea with no evidence yet
Learn it in: Reviewing scientific observation (Grade 2)
gullet
ScienceFrom Grade 3
the tube from mouth to stomach
Learn it in: Digestion introduction (Grade 3)
gust
ScienceFrom Grade 2
a short strong burst of wind
Learn it in: Wind (Grade 2), Wind direction (Grade 3)