Atmosphere
The coordinates that are used to pinpoint any location on Earth:
What are Latitude and Longitude?
A way to turn something that isn't useful into something better without throwing it away:
What is Recycling?
The curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution:
What is Orbit?
A tendency to do nothing or to remain unchanged:
What is Inertia?
An instrument that is used to indicate temperature changes:
What is a Thermometer?
The amount of water vapor in the air:
What is Relative Humidity?
Any substance or organism that is found in nature and is useful to humans:
What are Natural Resources?
An obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source of illumination:
What is an Eclipse?
The combined effect of all the forces on the object's acceleration:
What is Net Force?
Energy which a body possesses by virtue of being in motion:
What is Kinetic Energy?
The outermost layer of the Earth's atmosphere:
What is the Exosphere?
The effects of human activities on the environment:
What is Human Impact?
The apparent shape of the moon's sunlit portion:
What are the Phases of the Moon?
The measure of how much matter is in something:
What is Mass?
The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors:
What is Potential Energy?
The envelope of gases that surround the Earth or another planet:
What is the Atmosphere?
The weather conditions prevailing in an area over a long period:
What is Climate?
The height above a given level, especially sea level:
What is Elevation?
The flow of electrical power or charge:
What is Electricity?
Energy contained within a system that is responsible for its temperature:
What is Thermal Energy?
The force exerted by air on a surface due to the weight of the air above it:
What is Air Pressure?
The average amount of goods and services that are consumed by each person in a population as a statistical measurement:
What is Per-Capita Consumption?
A Galaxy that has a smooth spherical shape, and also has less of a structure than other galaxies.
What is an Elliptical Galaxy?
When an object is either speeding up while moving in a negative direction, or slowing down while moving in a positive direction:
What is Negative Acceleration?
The interaction of electric currents or fields and magnetic fields:
What is Electromagnetism?