This soft mineral is used to make talcum powder
Talc
This gas is the most significant contributor to global warming.
Carbon dioxide
The speed of light in a vacuum is approximately this many kilometers per second
300,000 km/s
A fraction where the numerator is larger than the denominator is called this
improper fraction
This is the process where water from lakes and rivers turns into vapor
evaporation
The point on Earth's surface directly above an earthquake's origin is called this.
Epicenter
This potent greenhouse gas is produced by cattle and rice paddies
methane
This molecule carries genetic information in cells.
DNA
This is the term for the amount of space an object occupies
Volumes
A volcano that is not currently erupting but may in the future is called this.
dormant
This type of rock forms under extreme pressure and heat
Metamorphic
this process removes salt from seawater to make it drinkable
desalination
Plants are called this because they make their own food
producers
The likelihood of an event occurring is called this
probability
What is the term for the graphical representation of seismic waves recorded during an earthquake?
Seismogram
Scientists estimate Earth is this many billion years old
4.5
This is the term for an extended period with below-average rainfall
drought
A tornado over water is commonly called this.
waterspout
A number divisible only by 1 and itself is called this
prime number
Sound travels fastest through this state of matter.
Solid
Geologists use this tool to measure rock hardness
Mohs hardness scale
The three R’s of sustainability are reduce, reuse, and this.
recycle
This type of medicine helps prevent viral infections like the flu
vaccine
an angle greater than 90 degrees but less than 180 degrees is called this
obtuse angle
The longest day of the year occurs on this day in the Northern Hemisphere.
summer solstice
These large ice formations carve U-shaped valleys as they move.
Glaciers
The process where species disappear forever is called this.
extinction
Bacteria that cause disease are known as this
pathogens
The middle value in a set of numbers is called this
median
This phenomenon causes a rainbow to appear
refraction
This Hawaiian volcano is the largest active volcano on Earth
Mauna Loa
The Amazon rainforest is often called this because of its rich biodiversity
lungs of the Earth
The energy an object has due to its motion is called this
kinetic energy
The value that satisfies an equation is called this.
solution
Earth is tilted at this angle relative to its orbit around the Sun.
23.5 degrees