Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The sun is

  1. The only star in our galaxy.

  2. Just one of billions of stars that make up our galaxy.

  3. The largest planet in our solar system.

  4. Technically speaking, one of Earth's moons.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Our galaxy (the Milky Way) contains an estimated 100-400 billion stars. The sun is just one ordinary star among these billions. It is not the only star, nor is it a planet or moon. The sun is located in the Orion Arm of the Milky Way, about 26,000 light-years from the galactic center.

Multiple choice general knowledge science & technology

What is the central and largest body of our solar system?

  1. Jupiter

  2. The Milky Way

  3. Earth

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

The sun is a star that contains 99.8% of all mass in the solar system, making it both the central and largest body. All planets, including Earth, orbit around the sun due to its immense gravitational pull. Jupiter is the largest planet but is still tiny compared to the sun, while the Milky Way is our galaxy, not part of our solar system.

Multiple choice general knowledge science & technology

Which of these features makes the Earth unique among planets?

  1. It is the only round planet.

  2. It is the only planet with its own moon.

  3. It is the only planet that has enough oxygen in its atmosphere to sustain life.

  4. It is the only ringed planet.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Earth's atmosphere contains approximately 21% oxygen, which is essential for most life forms as we know them. Other planets in our solar system have atmospheres composed mainly of carbon dioxide, nitrogen, or lack substantial atmospheres entirely. The presence of liquid water and suitable temperatures along with oxygen makes Earth uniquely habitable.

Multiple choice general knowledge science & technology

Comets are icy masses of frozen gases and dust particles. What happens when a comet gets too close to the sun?

  1. The gases catch fire, making the comet glow.

  2. The ice begins to melt, leaving a trail of gases and debris.

  3. The comet explodes, which is called a supernova.

  4. The comet bounces off the sun’s magnetosphere.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As comets approach the sun, solar radiation heats and vaporizes the frozen gases (water vapor, carbon dioxide, ammonia, methane), creating a glowing coma and tail. This tail always points away from the sun due to solar wind. The ice doesn't catch fire, comets don't explode as supernovae, and they don't bounce off magnetic fields.

Multiple choice general knowledge science & technology

What did 17th-century astronomer Edmund Halley notice about the comet later named after him?

  1. The comet passed by the Earth on a predictable schedule.

  2. The comet passed by the Earth at random intervals.

  3. The comet passed by Earth only once in a million years.

  4. The comet was on a collision course with Earth.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Edmund Halley studied historical records and realized that comets seen in 1531, 1607, and 1682 were actually the same object returning approximately every 76 years. He predicted it would return in 1758, and when it did, it was named Halley's Comet in his honor. This established that comets have predictable elliptical orbits, not random appearances.

Multiple choice general knowledge science & technology

What is a meteorite?

  1. A chunk of comet (rock) that survives our atmosphere and falls to Earth

  2. A meteor that hasn't hit Earth yet

  3. A piece of rock that is in orbit around the Earth

  4. A radioactive moon rock
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A meteorite is a solid piece of debris from an asteroid, comet, or other celestial body that survives passage through Earth's atmosphere and reaches the ground. The term meteor refers to the light phenomenon when it's burning in the atmosphere, while meteoroid is the object while still in space. Option A correctly identifies it as surviving material that falls to Earth.

Multiple choice general knowledge science & technology

The fates of the sun and the Earth are linked. Which of the following explains why this statement is true?

  1. Without the Earth in orbit, the sun would quickly burn up.

  2. Without the heat and light from the sun, life on Earth will cease.

  3. Without each other, they would both spin out of control.

  4. Without the sun to cool things off, the interior of the Earth would burn up the planet.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sun is the primary source of energy for Earth, providing heat and light necessary for photosynthesis and maintaining temperatures suitable for life. Without solar energy, Earth would become a frozen wasteland with no active weather systems, and all life would eventually cease. The sun doesn't need Earth to exist, and Earth doesn't cool the sun.

Multiple choice general knowledge science & technology

Planets have elliptical orbits. This means that

  1. Their orbits are perfectly round.

  2. Their orbits are in the shape of a figure eight.

  3. At some point of its orbit, a planet is closer to the sun.

  4. Their orbits change direction from time to time.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Elliptical orbits are oval-shaped, not circular. According to Kepler's First Law, planets orbit the sun in ellipses with the sun at one focus. This means the distance from the sun varies, with the closest point called perihelion and farthest called aphelion. The orbit doesn't change direction randomly or form a figure-eight.

Multiple choice general knowledge science & technology

We have a 24-hour day because that is

  1. The length of time it takes for the moon to travel around the Earth.

  2. The length of time it takes the Earth to rotate once around its axis.

  3. The length of time it takes the Earth to travel once around the sun.

  4. The length of time it takes the sun to rotate once around its axis.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A day is defined by Earth's rotation on its axis, which takes approximately 24 hours to complete one full rotation. This rotation creates the cycle of day and night as different parts of Earth face toward or away from the sun. It's unrelated to the moon's orbit (about 27 days) or Earth's revolution around the sun (365 days).

Multiple choice general knowledge science & technology

On Earth one year is

  1. The length of time for the moon to travel once around the Earth.

  2. The length of time for the Earth to rotate once around its axis.

  3. The length of time for the sun to travel once around the Earth.

  4. The length of time for the Earth to travel once around the sun.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

One year is the time it takes Earth to complete one orbit around the sun, approximately 365.25 days. This revolution through Earth's elliptical orbit creates the cycle of seasons. A year is not related to the moon's orbit around Earth (about 27 days) or Earth's daily rotation on its axis.