General and Fun
What has keys but can’t open locks?
Piano
This is the largest ocean on Earth.
Pacific Ocean
This process is how plants make their own food using sunlight.
Photosynthesis
This ancient civilization built pyramids along the Nile River.
Ancient Egypt
What gets wetter the more it dries?
Towel
Which element is liquid at room temperature?
Mercury
This line divides the Earth into the Northern and Southern Hemispheres.
Equator
This gas is most responsible for global warming due to human activities.
Carbon dioxide (CO2)
This war (1914–1918) was known as “The Great War.”
World War I
What is the name of the atom with the symbol Na
Sodium
This country has the largest population in the world.
India
The variety of living species in an ecosystem is called this.
Biodiversity
This famous explorer reached the Americas in 1492.
Christopher Columbus
The more you take, the more you leave behind. What are they?
Footsteps
What are reactants?
Two substances that react to produce products
This desert is the largest hot desert in the world.
Sahara desert
Competition between the same species is....
Intraspecific competition
This wall fell in 1989, symbolizing the end of the Cold War divide in Europe.
Berlin Wall
I have hands but cannot clap. What am I?
Clock
What is the electronic configuration of an atom with 17 electrons?
2/8/7
This European river flows through cities like Vienna, Budapest, and Belgrade.
Danube River
3 problems caused by Eutrophication are....
1) No sunlight results in no photosynthesis
2) Fish and animals die due to a lack of Oxygen and food.
3) Bacteria grow to decompose the dead bodies.