Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The galaxy we live in is called the Milky Way. It is shaped approximately like:

  1. a round ball

  2. a doughnut

  3. a pretzel

  4. a flat spiral
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Milky Way is a barred spiral galaxy, which is a type of spiral galaxy. 'Flat spiral' is the closest accurate description among the options. Spiral galaxies have a flat, rotating disk with spiral arms, which distinguishes them from round balls, doughnuts, or pretzels.

Multiple choice general knowledge science & technology

The metal mercury:

  1. Is the hardest known metal

  2. Is a liquid at room temperature

  3. Is highly radioactive

  4. Is extensively used in aircraft construction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mercury is unique among metals in that it is liquid at room temperature. Its melting point is -38.83°C (-37.89°F), so it exists as a liquid under normal conditions. Mercury is not the hardest metal (that would be diamond-like materials), is not highly radioactive, and is not used in aircraft construction.

Multiple choice general knowledge science & technology

If you were to take a lump of coal and squeeze for a long time at very high temperatures, you would end up with:

  1. graphite

  2. Volcanic glass, also known as obsidian

  3. A smaller lump of coal

  4. a diamond
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coal is composed primarily of carbon. Under extreme pressure and high temperature over geological time, the carbon atoms rearrange into a crystal lattice structure, forming diamonds. This process occurs deep within the Earth's mantle. Graphite is also formed from carbon but under different conditions.

Multiple choice general knowledge science & technology

It is now believed that dinosaurs became extinct because of:

  1. viral diseases

  2. hunting by early humans

  3. A worldwide period of climatic cooling

  4. A meteorite impact
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The scientific consensus, supported by extensive evidence including the iridium anomaly and Chicxulub crater, is that a massive meteorite impact approximately 66 million years ago caused the Cretaceous-Paleogene extinction event. This impact created environmental conditions that non-avian dinosaurs could not survive.

Multiple choice general knowledge science & technology

Kinetic energy is:

  1. Life energy, possessed only by living organisms

  2. Only important at subatomic distances

  3. Energy of movement

  4. A rare form of energy sometimes observed in deep space
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Kinetic energy is the energy possessed by an object due to its motion. The formula is KE = 1/2 mv², where m is mass and v is velocity. It is not exclusive to living organisms, is important at all scales (not just subatomic), and is commonly observed everywhere, not just in deep space.

Multiple choice general knowledge science & technology

Charles Darwin began developing his theory of evolution while voyaging on a ship named:

  1. the enterprise

  2. the beagle

  3. the santa maria

  4. the endeavour
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Charles Darwin developed his theory of evolution by natural selection during his five-year voyage (1831-1836) on HMS Beagle. The ship's expedition, particularly his observations in the Galápagos Islands, provided crucial evidence that influenced his groundbreaking work 'On the Origin of Species.'

Multiple choice general knowledge science & technology

An android is any robot that:

  1. Has more than one basic function

  2. Has the ability to make decisions and formulate plans

  3. Is built by other robots

  4. Looks and acts like a human
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

By definition, an android is a robot designed to resemble a human in appearance and behavior. The word comes from Greek 'andros' meaning man/human. Options A, B, and C describe general robot capabilities, not the specific characteristic that makes a robot an android.

Multiple choice general knowledge science & technology

What is special about Sirius, the Dog Star?

  1. It is the only star first observed by Albert Einstein

  2. It is the brightest star in the night sky ?

  3. It always lies directly above the North Pole ?

  4. It emits staccato barking sounds which radio telescopes can detect
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Sirius (Alpha Canis Majoris) is the brightest star in the night sky with an apparent magnitude of -1.46. It's not the only star Einstein observed ( astronomers observe many stars), it doesn't stay above the North Pole (that's Polaris), and the 'barking sounds' option is humorous fiction.

Multiple choice general knowledge science & technology

The platypus and the echidna are the only mammals that:

  1. lay eggs

  2. have green blood

  3. live in antarctica

  4. Eat eucalyptus leaves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Monotremes are the only order of mammals that lay eggs instead of giving birth to live young. The platypus and echidna are the only extant monotreme species. They do not have green blood, don't live exclusively in Antarctica, and koalas (not platypus/echnida) eat eucalyptus leaves.