cube

«cube» in Mova's school dictionary: a solid shape with 6 square faces that are all the same… — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

part of speech

noun (cube, cubes); verb (cube, cubed — to cut into cubes or to multiply a number by itself three times)

meaning for a pupil

1) A cube is a solid shape with 6 square faces that are all the same size, like a dice. A cube has 6 faces, 12 edges and 8 corners. tree →

2) A cube is a small block of something, like an ice cube or a sugar cube. tree →

3) The cube of a number is the number times itself times itself: the cube of 2 is 8. tree →

4) The cube root of a number is the number which, multiplied by itself twice, gives that number. tree →

sense in the lessons

maths: a shape with 6 faces, 12 edges and 8 corners (vertices); small cubes for volume, counting and stacking; volume = edge × edge × edge; cube numbers 1, 8, 27, 64; science: ice cubes melting; everyday life: cubes of cheese, building blocks, puzzle cubes

examples

• A cube has 6 faces. tree →
• She builds a tower with 12 cubes. tree →
• How many 1 cm cubes fill the box? tree →
• Each cube has edges 3 cm long. tree →
• Put 2 ice cubes in your drink. tree →
• The cube of 3 is 27. tree →
• Cut the cheese into cubes. tree →
• A dice is a cube with dots. tree →
• He tried it by square root and by cube root. tree →

note

Fixed numbers: 6 faces, 12 edges, 8 corners; volume = edge × edge × edge. Trap: «the cube of 3» means 3 × 3 × 3 = 27, not 3 × 3 (that is the square). A cube is solid (3D); a square is flat (2D).

In the corpora

• Heat, stirring and small grains all make dissolving faster, which is why loose sugar vanishes before a sugar cube does.
• Left: 5 cubes and 20 g.
• Right: 2 cubes and 110 g.
• Take 2 cubes and 20 g off each side: 3 cubes balance 90 g.
• So one cube weighs 90 ÷ 3 = 30 g.

Trees and pragmatics

Every meaning and example of «cube» parsed by Mova, each sentence with its dependency tree and frames.