Being effective

Look at these words which are used in the TED Talk. Match the words with their definitions.

Correct! Wrong!

The cords that hold the shoe tight around your foot

Correct! Wrong!

To attach or fasten with a string or cord

Correct! Wrong!

A join made by tying two pieces of string or cord together

Correct! Wrong!

A curved shape that comes round and crosses itself

Correct! Wrong!

When a knot falls and unties itself

Correct! Wrong!