Science

Which model is used for our solar system?

• Geocentric Model
• Heliocentric Model

Answer explanation

During the 16th century, Copernicus introduced a new model which was consistent with the observations and allowed for perfect circular motion. This is known as the Heliocentric model where the Sun is placed at the centre of the universe (hence, the Solar System) and the Earth is, like all the other planets, orbiting it. The heliocentric model also resolved the varying brightness of planets problem.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Which theory do we use to show the origin of a universe?

• String Theory
• Theory of Relativity
• Big Bang Theory
• Quantum Theory

Answer explanation

Throughout history, countless myths and scientific theories have tried to explain the universe's origins. The most widely accepted explanation is the big bang theory. Learn about the explosion that started it all and how the universe grew from the size of an atom to encompass everything in existence today.

Tags

NGSS.HS-ESS1-2

Who found the circulatory system before Harvey's discoveries?

• Louis Pasteur

• Ibn al-Nafis
• Hippocrates
• Galen

Answer explanation

Ibn Al-Nafis wrote about the circulatory system more or less 350 years ago before William Harvey's discoveries.

Which is the biggest organ in our body?

• Liver

• Lungs
• Skin
• Brain

Answer explanation

The skin is our body's largest organ.

Who is famous for his discovery of tuberculosis bacterium?

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Answer explanation

Robert Koch found tuberculosis bacterium and he got Noble Prize for his discovery in 1905.