Vocabulary

3 Now complete the definitions (1-11) below with the units from Exercise 2 and the people in the box.

Andre Marie Ampere (1775-1836) ■ Anders Celsius (1701-1744) Marie Curie (1867-1934) ■ Heinrich Hertz (1857-1894) ■ James Prescott Joule (1818-1889) ■ Lord Kelvin (1824-1907) ■ Georg Simon Ohm (1787-1854) ■ Blaise Pascal (1623-1662) ■ Sir Isaac Newton (1643-1727) ■ Count Alessandro Volta (1745-1827) ■ James Watt (1736-1819)

1A________ is a unit of pressure equal to one newton per square

metre. It's named after________ a French scientist.

2 A ____

an

is a unit of force. It's named after

English mathematician.

3 ________ is the temperature scale that has the freezing point of

water as 0° C and the boiling point as 100° C. The scale was
developed by a Swedish astronomer,_______ .

4 A________ is an amount of electric power. It is equal to one joule

per second. It's named after_______ , a Scottish engineer and

inventor.

5 A________ is a unit of electric force. It's named after_______ ,

an Italian physicist and pioneer in the study of electricity.

6 An________ is a unit of electric current. It's named after

_________ a French mathematician and physicist, a pioneer in

electrodynamics.

An________ is a unit of electrical resistance named after

8 A

a British

a German physicist.
_ is a unit of energy named after.

physicist.

9 ________ is the temperature scale that registers absolute zero

(-273.15 C) as 0°K. It's named after______ a British scientist.

10 A________ is a frequency equal to one cycle per second. It's

named after________ a German physicist.

11 A________ is a unit of radioactivity. It's named after_______

Polish-born chemist who discovered radioactivity in several elements.

Read the definitions in Exercise 3 again. Find words that mean:

1studies the elements and
their compounds

2 studies the universe

3 studies the physical
properties of materials

4 thinks of new machines

5 develops new ideas about a
subject