Question

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1-what scientists do to find out something about a topic
2-after something (eg a crime. an accident) has happened . we carry out this
3-to create something for the firs time
4-machines and tools that we use to do jobs
5-a mobile phone needs one of these to work
6-to improve something which already exists
7-whithout this, a car wouldn't go anywhere
8-a piece of equipment that does a specific job(eg a fridge)
9-without this, we couldn't turn on the lights at home
10-to find something which existed but no-one knew about before

Answer 1

1 research - what scientists do to find out something about a topic
2 investigation - after something (eg. a crime, an accident) has happened, we carry out this
3 invent - to create something for the first time
4 equipment - machines and tools that we use to do jobs
5 battery - a mobile phone needs one of these to work
6 modernise - to improve something which already exists
7 engine - without this, a car wouldn't go anywhere
8 appliance - a piece of equipment that does a specific job(eg a fridge)
9 switch - without this, we couldn't turn on the lights at home
10 discover - to find something which existed but no-one knew about before