mainframe Activity 4: Suggested answers: digital appliances, digital cameras, camcorders, TVs, minicomputers, PCs, laptops, netbooks, palm-size scanners, mobile phones, DVD players, d
Trang 1Activity 1:
b, a, d, f, e, c (from left to right)
Activity 2:
a F; b F; c T
Activity 3:
a Information Technology (IT); b camcorder
( camera recorder); c mainframe
Activity 4:
Suggested answers: digital appliances, digital
cameras, camcorders, TVs, minicomputers, PCs,
laptops, netbooks, palm-size scanners, mobile
phones, DVD players, digital music players,
mp3s, iPods
Activity 5:
Students’ own answers
Activity 6:
Students’ own answers
Unit 1 Module B
Activity 1:
a F; b F; c F; d T; e T; f T
Activity 2:
a No, it isn’t There are Maglev trains in only a
few places.
b In Japan, USA and Europe.
c Because they have zero emissions: they emit
no pollutants
d It is a car that converts gasoline into
hydrogen, carbon dioxide and water with a
transformer Thus, it does not pollute.
e It takes off as an ordinary plane, then
accelerates into orbit around the planet, and
Unit 1 Module A finally returns through the atmosphere and lands as a common aeroplane.
Activity 3:
a 7; b 4; c 2; d 5; e 1; f 3; g 6
Activity 4:
a magnetic levitation; b electric cars; c fuel cell,
carbon dioxide; d rocket planes
Activity 5:
Suggested answers:
b Who can now develop a rocket plane?
c What are the advantages of using electric cars?
d Where is there a Maglev train?
e When will people fly in rocket planes?
f Why are fuel cell cars non pollutant?
Activity 6:
a Maglev trains exist.
b There are electric cars in Japan, USA and
Europe.
c Electric cars do not produce pollution
d People use the fuel cell cars.
e The rocket plane does not function like an
aeroplane It can land like common airplanes.
f Rocket planes are not working yet.
g We do not have the Maglev in Argentina.
Unit 2 Module A
Activity 1:
a T; b F; c T; d T
Activity 2:
a reusable; b space; c exploration;
d arguments; e expensive; f stars;
g transportation
reusable; transportation; stars; space; expensive; arguments; explorations
Trang 2Activity 3:
a first; b high; c solutions; d global;
e manned; f few
Activity 4:
(from right to left)
Mercury, Venus, Earth, Mars, Jupiter, Saturn,
Uranus, Neptune, Pluto
a planets, solar; b Sun; c Moon, satellite;
d Earth; e air
Activity 5:
Students’ own answers
Unit 2 Module B
Activity 1:
a The mountains and craters on the surface
of the Moon, the satellites of Jupiter and the
starry Milky Way.
b The word telescope is derived from the Greek
words tele, from afar, and skopos, viewer
c All telescopes gather radiation from distant
objects over a large area and focus on it; so
they increase the intensity of the radiation and
allow the objects to be magnified.
d Refractors that use lenses, reflectors that
use mirrors and catadioptrics that use a
combination of both lenses and mirrors.
e Orbiting telescopes are used for the study
of structures and systems too far to be seen
clearly from Earth.
f Radio telescopes have helped vast new regions
of the universe to become observable on Earth
because radio waves penetrate dust and gas
that obscure light These are the greatest and
most powerful telescopes.
Activity 2:
a F; b T; c F; d F; e T; f F; g F; h T
Activity 3:
a 2; b 5; c 3; d 1; e 4
Activity 4:
a vast; b magnification; c sensitive; d allow;
e gather
Activity 5:
Students’ own answers The automatic calculator was invented in 1623
by Wilhelm Schickard; the pendulum clock was invented in 1656 by Christian Huygens and the steam engine was invented in 1698 by Thomas Savery
Unit 3 Module A
Activity 1:
a Ramjet Project consists in a spaceship which
obtains its fuel from its surrounding space.
b Project Dedalus was about launching a probe
propelled by means of internal thermonuclear microexplosions
c A spaceship with an anti-matter engine could
go at light-speed propulsion.
d According to some researchers, solar wind
could be used to move a vehicle.
Activity 2:
a light speed; b space ship; c anti-matter;
d nuclear explosion; e solar wind; f sun light
a light speed; b nuclear explosion;
c anti-matter; d spaceship; e solar wind;
f sunlight
Activity 3:
Students’ own answers
Trang 3Activity 4:
rockets: cohetes; launch: lanzar; vehicle: vehículo;
spaceship: nave especial; propulsion: propulsión;
solar system: sistema solar; galaxy: galaxia;
spacecraft: nave espacial; planetary:
planetaria / o; atmosphere: atmósfera
Activity 5:
Students’ own answers
Unit 3 Module B
Activity 1:
a important, hopeful; b Students’ own
answers; c Students’ own answers
Activity 2:
Students’ own answers
Activity 3:
a T; b T; c T; d F; e F
Activity 4:
a 5; b 6; c 1; d 2; e 3; f 4
Activity 5:
a probe; b administer; c give; d no pain device
Activity 6:
Students’ own answers
Unit 4 Module A
Activity 1:
a everywhere in nature; b street lighting;
c positive charges
Activity 2:
a 3; b 5; c 6; d 2; e 4; f 1
Activity 3:
Students’ own answers
Activity 4:
a Where does energy occur?
b What does electric power do?
c What does ordinary electrical phenomenon
depend on?
d What do electrical charges consist in?
e How did electricity affect mankind?
f How did mankind begin to understand
electricity?
Activity 5:
a Un generador eléctrico es una fuente de
electricidad, especialmente una que transforma
la energía eléctrica o calórica en corriente eléctrica.
b Un foco es parte de una lámpara eléctrica
c Un capacitador es un condensador.
d Un oscilóscopo es un tipo de oscilógrafo que
muestra visualmente una onda eléctrica en una pantalla fluorescente.
e El sistema eléctrico es una batería de células
electromecánicas para generar corriente eléctrica.
Unit 4 Module B
Activity 1:
Students’ own answers
Activity 2:
a Because they have a greater understanding of
the structure of matter.
b Composite materials are complex combinations
of fibres (such as carbon or glass) which are embedded in a matrix of plastic, ceramic or metal
c They work through actuators and motors that
behave like muscles, sensors that serve as
Trang 4nerves and memory and communications and
computational networks that represent the
brain and the spine
Activity 3:
a …because of their extraordinary strength and
lightness.
b …engine efficiency and pollution reduction in
automobiles and trucks
c …ladders, buildings and bridges
d …alert you when they are overloaded.
Activity 4:
Students’ own answers
Activity 5:
Students’ own answers