Why again Sujan
Environment
Science
Math
General Knowledge
100

This soft mineral is used to make talcum powder

Talc


100

This gas is the most significant contributor to global warming.

Carbon dioxide

100

The speed of light in a vacuum is approximately this many kilometers per second

300,000 km/s

100

A fraction where the numerator is larger than the denominator is called this

improper fraction

100

This is the process where water from lakes and rivers turns into vapor

evaporation

200

The point on Earth's surface directly above an earthquake's origin is called this.

Epicenter 

200

This potent greenhouse gas is produced by cattle and rice paddies

methane

200

This molecule carries genetic information in cells.

DNA

200

This is the term for the amount of space an object occupies

Volumes 

200

A volcano that is not currently erupting but may in the future is called this.

dormant

300

This type of rock forms under extreme pressure and heat

Metamorphic

300

this process removes salt from seawater to make it drinkable

desalination

300

Plants are called this because they make their own food

producers

300

The likelihood of an event occurring is called this

probability

300

What is the term for the graphical representation of seismic waves recorded during an earthquake?  

Seismogram

400

Scientists estimate Earth is this many billion years old

4.5

400

This is the term for an extended period with below-average rainfall   

drought

400

A tornado over water is commonly called this.

waterspout

400

A number divisible only by 1 and itself is called this

prime number

400

Sound travels fastest through this state of matter.

Solid

500

Geologists use this tool to measure rock hardness

Mohs hardness scale

500

The three R’s of sustainability are reduce, reuse, and this.

recycle

500

This type of medicine helps prevent viral infections like the flu

vaccine

500

an angle greater than 90 degrees but less than 180 degrees is called this

obtuse angle

500

The longest day of the year occurs on this day in the Northern Hemisphere.

summer solstice

600

These large ice formations carve U-shaped valleys as they move.

Glaciers

600

The process where species disappear forever is called this.

extinction

600

Bacteria that cause disease are known as this

pathogens

600

The middle value in a set of numbers is called this

median

600

This phenomenon causes a rainbow to appear

refraction

700

This Hawaiian volcano is the largest active volcano on Earth

Mauna Loa

700

The Amazon rainforest is often called this because of its rich biodiversity

lungs of the Earth

700

The energy an object has due to its motion is called this  

kinetic energy

700

The value that satisfies an equation is called this.

solution

700

Earth is tilted at this angle relative to its orbit around the Sun.

23.5 degrees

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