quantum mechanics
distingiushed. He had a long and distinguished career as a diplomat.
go back and forth. She swayed gently back and forth to the music.
cognitive. Studies show a connection between aerobic exercise and cognitive ability.
beak. Birds use their beaks to pick up food.
craft. These bracelets were crafted by Native Americans.
instead. There's no coffee - would you like a cup of tea instead?
boundary. The Ural mountains mark the boundary between Europe and Asia.
jellyfish
to make objects, especially in a skilled way
a sea creature with a soft, oval, almost transparent body
a theory that explains the behaviour of elementary particles, both separately and in groups
the hard, pointed part of a bird's mouth
moving first in one direction and then in the opposite one
relating to or involving the processes of thinking and reasoning
a real or imagined line that marks the edge or limit of something
respected and admired for excellence
in place of someone or something else