Space and Technology

Name the moons of Mars

• Deimos and Phobos.

• Deimos and Hemions

• Hemions and Io

• Io and Titan

Answer explanation

Mars has two moons, Deimos and Phobos. Deimos is the smaller and more distant moon, while Phobos is larger and orbits closer to Mars. The other options listed do not include the correct moons of Mars.

Red planet is

• venus

• Earth

• Mars

• Jupiter

Answer explanation

The term 'Red planet' refers to Mars, known for its reddish appearance due to iron oxide on its surface. Venus, Earth, and Jupiter do not have this characteristic, making Mars the correct answer.

Neutron stars can spin

• 600 times per second

• 5000 times per second.

• 245 times per second.

• 60 times per second.

Answer explanation

Neutron stars can spin incredibly fast, with some rotating up to 600 times per second. This rapid rotation is due to their compact mass and conservation of angular momentum, making 600 times per second the correct answer.

Which of the following explains the revolution of a planet?

• The Earth revolves around the sun once per day.

• The Earth revolves around the sun once per year.

• The moon revolves around the sun once per day.

• The Earth rotates on it's axis once per day.

Answer explanation

The correct choice is 'The Earth revolves around the sun once per year.' This describes the planet's revolution, which is the complete orbit around the sun, taking approximately 365 days.

super massive black hole, located ​

at the center.​

• galaxy

• Star

• Sun

• Asteroid

Answer explanation

A super massive black hole is typically found at the center of a galaxy, where it exerts a strong gravitational pull on stars and other matter. Therefore, the correct answer is 'galaxy'.

Dying Stars Lead to

• super massive Black Holes

• Regular black holes

• Stellar Black Holes

• Deadly Black Holes

Answer explanation

Dying stars typically end their life cycle by collapsing under their own gravity, leading to the formation of stellar black holes. These are formed from stars with sufficient mass, unlike supermassive black holes which arise from different processes.

The oldest supermassive Black Hole Is

• 13-Billion-Year-Old

• 43-Billion-Year-Old

• 23-Billion-Year-Old

• 13-Trillion-Year-Old

Answer explanation

The correct answer is 13-Billion-Year-Old, as it refers to the age of the oldest known supermassive black hole, which formed shortly after the Big Bang, making it significantly older than the other options.

The most luminous objects in the universe is

• Aroua

• Shooting Star

• Black holes

• Galaxy

Answer explanation

Black holes are the most luminous objects in the universe due to the immense energy emitted as matter falls into them, creating powerful jets and radiation, making them detectable across vast distances.

The Big Bang theory of the formation and expansion of the universe is supported by the observed ____.

• blue-violet shift

• red shift

• "big crunch"

• shorter light waves

Answer explanation

The Big Bang theory is supported by the observed red shift, which indicates that galaxies are moving away from us, suggesting the universe is expanding. This phenomenon aligns with the predictions of the Big Bang model.

From the cosmic background radiation, scientists can infer that, just after the big bang, the universe must have been

• very small

• hot

• the same average temperature as it is today

• cooler than it is today

Answer explanation

The cosmic background radiation indicates that shortly after the big bang, the universe was extremely hot due to the high energy conditions present at that time, supporting the choice 'hot'.