the planet on which humans and animals live
Earth (n) /ɜːθ/
the degree scale used to express how hot or cold something is
temperature (n) /ˈtemprətʃər/
the force that makes things fall to the ground
gravity (n) /ˈɡrævəti/
the fourth planet from the sun in the solar system in terms of distance
Mars (n) /mɑːrz/
the second planet from the sun in terms of distance
Venus (n) /ˈviː.nəs/
a vehicle that researchers send into space and stays above the Earth as a base for astronauts
space station (n) /ˈspeɪs ˌsteɪ.ʃən/
an essential gas for people, animals and plants to survive
oxygen (n) /ˈɑːksɪdʒən/
an object in the sky that people think is a spaceship from another world
UFO (n) /ˌjuː ef ˈəʊ/ unidentified flying object
an object in the sky that has the shape of a disk
flying saucer (n) /ˌflaɪɪŋ ˈsɔːsər/
in the shape of a disk that is flat, thin and round
disk-shaped (a) /dɪsk-ʃeɪpt/
unusual or surprising in a way that is hard to explain
strange (a) /streɪndʒ/ stranger (n)
a creature that doesn't come from Earth
alien (n) /ˈeɪliən/
extremely large
huge (a) /hjuːdʒ/
very small
tiny (a) /ˈtaɪni/
very scared or frightened
terrified (a)/ˈterɪfaɪd/ terrifying (a) terrifyingly (adv) terrify (v)
