different organs that work together to carry out a certain function in the body
(organ) system
the study of our solar system, stars, galaxies and the universe
Astronomy
a consumer that eats other animals (which are their prey)
predador
large body that orbits a star
planet
to keep safe, to protect from extinction
conserve
the process of breaking down food into very tiny particles
digestion
the study of natural phenomena from the smallest sub-atomic particles to entire galaxies
Physics
special tubes that carry the blood
blood vessels
everything that exists
universe
the study of living things
biology
the gradual increase in temperatures throughout the world
global warming
is a measure of how hot or cold an object is
temperature
the study of the composition of substances and how they interact with each other
Chemistry
the Earth's star
Sun
the organs we use for breathing
lungs
the size of the outside part of an object
surface (area)
the brain and nerves
nervous system
place where an organism lives (natural home of a plant or animal)
habitat
bean-shaped organs that filter blood to remove wast products
kidneys
liquid produced in the mouth
saliva
can be changed back to what it was before
reversible
our natural surroundings
environment
the way we take air into our bodies and let it out of our bodies
breathing
making the environment dirty with waste products
pollution
the organ which mixes chewed food with digestive juices to form a thick liquid
stomach
the system formed by the heart, blood vessels and blood
circulatory system
a store of something necessary for life, such as water, energy and minerals
resource
the organ that controls all body functions
brain
a part inside the body that carries out a specific function to keep us alive
organ
cannot be changed back to what it was before
irreversible
rain that contains dissolved nitric oxides or sulfur dioxide
acid rain
the force that pulls objects towards the Earth
gravity
regions with very little rainfall
desert
to re-process something and make into a new product
recycling
one of the smallest parts of a plant or animal tissue
Cell
a special muscle that pumps blood around the body
heart
a way to describe the feeding relationship between plants and animals
food chain
an astronomical object that generates energy and gives out light
star
a particular type of living organism
species
removal of trees by humans
deforestation
the process of removing of waste products from the body
excretion
the organ which breaks down food into tiny particles that can move into the blood; undigested food is pushed out at the end of it
intestines
very small living things, usually only one cell big
microbes
the planet that we inhabit
Earth
an animal that is eaten by another animal (a predador)
prey
the study of Earth, including its oceans and atmosphere, as a system
Earth Science
the mixture of gases surrounding the Earth
atmosphere
a living thing (usually an animal) that eats another plant or animal
consumer
a way to remove wastes from the blood with a machine if the kidneys do not work properly
dialysis