What do we measure when we want to know how far apart two objects or locations are from each other?
Distance
What term describes the outermost layer or boundary of an object, such as the Earth's crust or the exterior of a planet or moon?
Surface
What type of unmanned spacecraft is designed to explore outer space, gather data about distant celestial bodies, and transmit findings back to Earth?
Space probe
What term describes a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun?
Comet
What geological features on celestial bodies, such as the Moon or Mars, are formed by the impact of meteorites or asteroids striking their surfaces?
Craters
What's the the natural satellite of the earth?
Moon
What's the name of the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets?
Solar System
How do you call a building from which scientists can watch the planets, the stars, the weather, etc.?
Observatory
How do you call a person whose job is treating people's teeth?
Dentist
How do you call a particular country's fighting force?
Army
How do you call the thick, heavy soil that is soft when wet, and hard when dry or baked, used for making bricks and containers?
What's the name of a green precious stone from which jewelry and small decorative items are made?
Jade
What term describes a particular set of clothes that has to be worn by the members of the same organization or group of people?
Uniform
What term describes any of the hard parts inside a human or animal that make up its frame?
Bone
What term describes someone who studies fossils as a way of getting information about the history of life on Earth?
Palaeontologist
What term refers to in or coming from a place outside the planet Earth?
Extraterrestrial
