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35 terms

elementary science vocabulary

k-5 science vocabulary words 2012-2013
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cells
the smallest unit of life
nucleus
In atoms: the center of the atom which contains the protons and neutrons.
In cells: structure that contains the cell's genetic material (DNA) and controls the cell's activities
atom
The basic particle from which all elements are made.
electron
neutron
A subatomic particle that has no charge and that is found in the nucleus of an atom
proton
A subatomic particle that has a positive charge and that is found in the nucleus of an atom
photosynthesis
process by which plants use the sun's energy to convert water and carbon dioxide into sugars
chloroplast
an organelle found in plant and algae cells where photosynthesis occurs
cell wall
strong layer around the cell membrane in plants, algae, and some bacteria
cell membrane
thin, flexible barrier around a cell; regulates what enters and leaves the cell
photon
a tiny particle or packet of light energy
producer
an organism that makes its own food
consumer
an organism that obtains energy by feeding on other organisms
predator
any animal that lives by preying on other animals
prey
animal hunted or caught for food
herbivore
plant eater
carnivore
meat eater
insectivore
any organism that feeds mainly on insects
frugivore
An animal that eats mostly fruit
adaptation
inherited characteristic that increases an organism's chance of survival
evolution
change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
DNA
deoxyribonucleic acid, the material that contains the information that determines inherited characteristics
cytosine
The base that pairs with Guanine with DNA
guanine
The base that pairs with Cytosine in DNA
thymine
The base that pairs Adenine in DNA
adenine
The base that pairs with Thymine in DNA
genes
sequence of DNA that codes for a protein and thus determines a trait
chromosomes
threadlike structures made of DNA molecules that contain the genes
binary code
information transformed into a series of digits 1 and 0 for storage and manipulation in computers
Morse code
telegraph code of dots and dashes invented by Samuel Morse
Charles Darwin
English naturalist. He studied the plants and animals of South America and the Pacific islands, and in his book On the Origin of Species by Means of Natural Selection (1859) set forth his theory of evolution.
Sir Alfred Russel Wallace
Same theory as Darwin, but not published
HMS Beagle
Ship that set sail on December 17th, 1831, carried Charles Darwin on his legendary voyage
Galapagos Islands
a group of islands in the Pacific off South America
Natural selection
the process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species

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