Solar System
How long does a solar eclipse last?
About seven and a half minutes
What is the largest bone in the human body?
Femur
What metal is found at the center of the Earth?
Iron. This is very different from the Earth’s crust and mantle, which are rich in minerals.
How many oceans contain sharks?
All of them. And that’s not all! Some are also found in rivers and freshwater lakes.
Which American civil rights leader delivered his famous "I Have a Dream" speech in 1963?
Martin Luther King Jr.
What causes a solar eclipse?
The moon moves between the sun and Earth, casting a shadow on Earth
What is the smallest bone in the human body?
The stapes bone, also known as the stirrup bone. It’s located inside your ear.
What is the tallest mountain in the world?
Mount Everest. The mountain peak reaches 29,029 feet at its summit.
What is the largest land animal alive today?
The African Elephant. These gigantic creatures can weigh as much as 7 tons!
What was the name of the first human-made object to impact the Moon in 1966?
Luna 2
What is the largest star in the Solar System ?
The Sun
What kind of blood type is known as the universal donor?
O negative. Type O negative blood has no antigens so it won't trigger an immune response, even if the recipient has a different blood type.
How do scientists measure the severity of an earthquake?
They use something called the Richter Scale. The measure has been in use since 1935.
Which animal can change direction midair?
The cheetah. They are the only type of cat able to do so.
What was the name of the first successful artificial satellite, launched by the Soviet Union in 1957?
Sputnik 1
Who was the first person to walk on the Moon?
Neil Armstrong. He landed on July 20, 1969, with Edwin “Buzz” Aldrin.
What is the largest organ in the human body?
The skin.
How many continents are there in the world?
Seven: Africa, Antarctica, Asia, Australia/Oceania, Europe, North America, and South America.
What can sharks sense that humans cannot?
Electricity. They do this using organs called ampullae of Lorenzini.
Who invented the polio vaccine in the 1950s?
Dr. Jonas Salk
What color is the sunset on Mars?
Blue. Mars' atmosphere primarily composed of carbon dioxide interacts with iron-rich dust
What do white blood cells do?
White blood cells protect you against illness and disease.
Which city in Italy is famous for its canals?
Venice. In total, the city contains 150 canals.
What process do bats use to locate their prey?
Echilocation
United Nations was founded in which year to maintain world peace and security?
1945