Basic Science Quiz For Beginners

Explanation
The Sun is a star because it is a massive, glowing ball of gas that produces its own light and heat through nuclear fusion. It is located at the center of our solar system and is responsible for providing energy and warmth to Earth. The Moon is not a star as it does not produce its own light but reflects the sunlight. The Ocean is a body of water and Jupiter is a planet, neither of which are stars.

Explanation
The speed of light is the fastest at approximately 299,792,458 meters per second, while the speed of sound in air is much slower at around 343 meters per second. The speed of Earth's rotation at the equator is even slower, about 1670 kilometers per hour.

Explanation
The sun is classified as a yellow dwarf. Yellow dwarf stars, like our Sun, are main-sequence stars in a stable phase of their lifecycle, fusing hydrogen into helium in their cores to generate energy and light.

Explanation
The correct answer is Uranus, Jupiter, and Neptune. These three planets are considered gaseous because they are primarily composed of gas, mainly hydrogen and helium. They do not have a solid surface like terrestrial planets such as Mars and Venus. Instead, their atmospheres extend for thousands of kilometers before gradually transitioning into a dense, hot core. These gas giants have thick atmospheres with swirling storms and high wind speeds, making them distinct from the rocky planets in our solar system.

Explanation
Gallelli Galileo is the correct answer because he is credited with inventing the telescope. Galileo was an Italian astronomer and physicist who made significant contributions to the field of astronomy. He constructed his own telescope in 1609, which allowed him to make groundbreaking observations of celestial bodies and further our understanding of the universe. His invention revolutionized astronomy and laid the foundation for future scientific discoveries.

Explanation
Carnivores are animals that only consume other animals for their diet. They are typically at the top of the food chain and have specialized adaptations such as sharp teeth and claws to hunt and kill their prey. Unlike herbivores, which only eat plants, and omnivores, which consume both plants and animals, carnivores rely solely on animal flesh for their nutritional needs. Therefore, the correct answer is carnivores.

Explanation
Jupiter is the biggest planet in our solar system. It has a diameter of about 143,000 kilometers, making it more than 11 times the diameter of Earth. Jupiter's massive size is due to its high concentration of gases, primarily hydrogen and helium. Its immense gravity also contributes to its size, allowing it to gather and hold onto a large amount of gas and other materials. Additionally, Jupiter has a strong magnetic field and numerous moons, further showcasing its dominance in our solar system.

Explanation
Fire cannot burn without oxygen because oxygen is necessary for the process of combustion. When a fire burns, it undergoes a chemical reaction called oxidation, in which the fuel combines with oxygen to release heat and light. Without oxygen, there is no source of oxygen molecules to react with the fuel, and therefore, the fire cannot sustain itself.

Explanation
An adult human has 206 bones. This is the correct answer because the human skeleton is made up of various bones that provide support, protection, and facilitate movement. These bones include the skull, spine, ribs, pelvis, and limbs. While the number of bones can vary slightly from person to person due to the presence of small accessory bones, the average adult human has 206 bones in their body.

Explanation
Light takes approximately 8 minutes and 20 seconds to travel from the Sun to Earth. This is because light travels at a speed of about 299,792 kilometers per second, and the average distance between the Sun and Earth is about 149.6 million kilometers. By dividing the distance by the speed, we can calculate that it takes light roughly 500 seconds, or 8 minutes and 20 seconds, to reach Earth from the Sun.