Space
Why do astronauts on the ISS experience 16 sunrises and sunsets each day?
Because the ISS orbits the Earth every 90 minutes.
Q: What is Challenger Deep?
A: The deepest known part of the ocean, located in the Mariana Trench.
Q: What is a fractal?
A: A geometric shape that is self-similar and has repeating patterns at different scales.
Q: What is the purpose of wind tunnel testing in aerospace engineering?
A: To study how air flows around an object and test the aerodynamic properties of aircraft and spacecraft.
Q: What is the difference between a physical change and a chemical change?
A: A physical change does not create a new substance and is often reversible, while a chemical change results in the formation of a new substance and is usually irreversible.
What is circadian rhythm?
The body's natural internal clock that regulates sleep and behavior patterns.
Q: What are the two main types of deep-sea submersibles?
A: Crewed vehicles (human-occupied) and uncrewed vehicles (remotely operated).
Q: What is the name of the fractal that looks like a fern?
A: The Barnsley Fern.
Q: Who were the inventors of the first wind tunnel?
A: Francis Wenham and John Browning in 1871.
Q: What is the Law of Conservation of Mass?
A: It states that mass cannot be created or destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.
Q: Why was the ISS lighting system upgraded to LEDs?
A: LEDs use less energy, generate less heat, and can simulate Earth’s day/night cycle.
Q: What is the Great Pacific Garbage Patch?
A: A massive floating collection of waste in the Pacific Ocean, three times the size of France.
Q: What mathematical concept is used in GPS technology?
A: Trilateration, which calculates distances from satellites to determine location.
Q: What is Bernoulli’s Principle, and how is it used in wind tunnels?
A: It states that as the speed of a fluid increases, its pressure decreases. It is used to create high-speed airflow in small wind tunnels.
Q: What is an exothermic reaction?
A: A reaction that releases heat energy into the surroundings.
Q: How does NASA reduce noise during rocket launches?
A: By using a water spray system that absorbs sound energy and turns it into heat.
Q: How do some deep-sea creatures produce their own food?
A: Through chemoautotrophy, using chemical reactions instead of sunlight for energy.
Q: Who helped develop the GPS system by modeling Earth's shape?
A: Mathematician Gladys Mae West.
Q: What was the Avro Arrow, and why was it significant?
A: A Canadian supersonic jet designed in the 1950s, one of the most advanced aircraft of its time.
Q: What is the difference between incandescence and luminescence?
A: Incandescence is light produced from high temperatures, while luminescence occurs without significant heat.