The invisible gas we breathe to stay alive. không khí
air
The air you take in and let out from your lungs. hơi thở
breath
Special qualities that make something or someone different. đặc điểm
characteristics
The planet where we live. Trái Đất
Earth
Causing damage or pain. có hại
harmful
Something that cannot happen or be done. không thể
impossible
A large round object that moves around a star. hành tinh
planet
The sun and the planets that move around it. hệ Mặt Trời
solar system
A tool used to see things far away in space. kính viễn vọng
telescope
How hot or cold something is. nhiệt độ
temperature
Objects used to do or fix something. dụng cụ
tools
To use too much of something carelessly. lãng phí
waste
An exciting and sometimes risky experience. cuộc phiêu lưu
adventure
A person trained to travel in space. phi hành gia
astronaut
To say you are unhappy or not satisfied about something. phàn nàn
complain
A large round hole in the ground or on a planet’s surface. miệng núi lửa
crater
