If you put different things together, you m____ them.
mix
If someone find something new, they d______ it.
discover
The Chinese used gunpowder to make f_____: colourtful lights in the sky.
fireworks
People who are very smart and discover things are called s_______.
scientists
It helps you to find the way on land or sea.
compass
When you light a fire or a candle, you get a f______
flame
What did the Chinese use paper for?
Wrapping
If you make something new, you i___________ it.
invent
A thin, sharp object made of metal. What is it?
needle