Glossary: Terms Starting with B
58 definitions in Science with links to the lessons that teach each word.
Showing Science only. Show all subjects
backbone
ScienceFrom Grade 3
the line of bones along the back
Learn it in: Vertebrates and invertebrates (Grade 3)
bacteria
ScienceFrom Grade 6
tiny single-celled organisms without a nucleus
Learn it in: Major groups of living things (Grade 6)
balance
ScienceFrom Grade 3
a steady state of numbers
Learn it in: Animal feeding relationships (Grade 3), Food webs (Grade 4), Matter and mass (Grade 5)
balanced diet
ScienceFrom Grade 5
a mix of foods giving all nutrients in the right amounts
Learn it in: Nutrition and health (Grade 5), Personal health (Grade 6)
balanced forces
ScienceFrom Grade 5
forces that are equal and opposite
Learn it in: Balanced and unbalanced forces (Grade 5), Balanced forces (Grade 6), Forces and energy review (Grade 6)
ball-and-socket joint
ScienceFrom Grade 4
a joint that moves in many directions
Learn it in: Joints (Grade 4)
bar chart
ScienceFrom Grade 3
a chart where bars show amounts
Learn it in: Tables and charts (Grade 3), Tables and graphs (Grade 5)
bar graph
ScienceFrom Grade 2
a chart with bars to show amounts
Learn it in: Weather records (Grade 2), Recording results (Grade 3), Tables and graphs (Grade 4)
barrier
ScienceFrom Grade 4
something built to stop water or land moving
Learn it in: Water and land changes (Grade 4)
bathe
ScienceFrom Grade 1
to wash the whole body with water and soap
Learn it in: Personal hygiene (Grade 1)
battery
ScienceFrom Grade 1
a small power store inside a torch
Learn it in: Artificial light sources (Grade 1), Everyday energy uses (Grade 2), Cells and batteries (Grade 4)
beam
ScienceFrom Grade 2
a long strong bar that holds a roof or floor
Learn it in: Science in construction (Grade 2), Light travelling in straight lines (Grade 4)
because
ScienceFrom Grade 2
a word that gives a reason
Learn it in: Explaining results (Grade 2), Hypotheses and predictions (Grade 5)
bend
ScienceFrom Grade 2
to curve something without breaking
Learn it in: Changing the shape of materials (Grade 2)
bias
ScienceFrom Grade 3
an unfair influence on a result
Learn it in: Introduction to fair tests (Grade 3), Fair testing (Grade 4), Scientific reasoning (Grade 6)
bibliography
ScienceFrom Grade 6
a list of sources used
Learn it in: Independent science project (Grade 6)
binary fission
ScienceFrom Grade 6
splitting into two to reproduce
Learn it in: Unicellular organisms (Grade 6)
biodiversity
ScienceFrom Grade 3
the variety of living things
Learn it in: Ecosystem protection (Grade 3), Conservation (Grade 4), Biodiversity (Grade 5)
biomass
ScienceFrom Grade 5
the mass of living material
Learn it in: Energy flow (Grade 5), Renewable resources (Grade 6)
biome
ScienceFrom Grade 5
a large region with similar climate and life
Learn it in: Biosphere (Grade 5), Climate patterns (Grade 6)
biomimicry
ScienceFrom Grade 6
copying ideas from nature to solve problems
Learn it in: Researching solutions (Grade 6)
biotic
ScienceFrom Grade 3
living parts of an ecosystem
Learn it in: Living and non-living components (Grade 3), Ecosystems (Grade 5)
block
ScienceFrom Grade 1
to stop something from passing
Learn it in: Shadows (Grade 1), Light and shadows (Grade 2), Light travelling in straight lines (Grade 4)
boil
ScienceFrom Grade 1
to heat water until it bubbles (an adult does this)
Learn it in: Drinking clean water (Grade 1)
bounce
ScienceFrom Grade 1
to spring back after hitting something
Learn it in: Moving objects (Grade 1), Changing direction (Grade 2)
brain
ScienceFrom Grade 3
the organ that controls the body
Learn it in: Major internal organs (Grade 3), Nervous system introduction (Grade 5)
brainstorm
ScienceFrom Grade 3
to think of many ideas quickly
Learn it in: Designing simple solutions (Grade 3)
braking distance
ScienceFrom Grade 6
distance a vehicle travels while stopping
Learn it in: Practical applications (Grade 6)
branch
ScienceFrom Grade 6
a separate path for current
Learn it in: Parallel circuits introduction (Grade 6)
breathe
ScienceFrom Grade 1
to take air in and let air out
Learn it in: Characteristics of living things (Grade 1), What is air? (Grade 2)
breeze
ScienceFrom Grade 1
a gentle wind
Learn it in: Windy weather (Grade 1), Moving air (Grade 2), Wind (Grade 2)
brick
ScienceFrom Grade 2
a block made of baked clay
Learn it in: Science in construction (Grade 2), Materials for construction (Grade 4)
bright
ScienceFrom Grade 1
giving a lot of light
Learn it in: Functions of the senses (Grade 1), What is light (Grade 1)
Brownian motion
ScienceFrom Grade 6
random jiggling of tiny visible bits caused by particle hits
Learn it in: Particle movement (Grade 6)
build log
ScienceFrom Grade 5
a record of what was made and changed
Learn it in: Building prototypes (Grade 5), Building prototypes (Grade 6)
burrow
ScienceFrom Grade 1
a hole in the ground where an animal lives
Learn it in: Animal shelters (Grade 1), Grassland habitats (Grade 2)