英語 小学生向けクイズ！【問題 全10問・答え付き】 | 2025年03月版

The freezing point of water is 0 degrees Celsius (32 degrees Fahrenheit). This is the temperature at which water changes its state from a liquid to a solid, forming ice. At this temperature, the molecules in water slow down enough to form a rigid structure known as a crystalline lattice, which is why ice is less dense than liquid water and floats. The freezing point of water is a critical reference point in science and everyday life, affecting weather patterns, living conditions, and human activities, such as agriculture and transportation.

Bees collect nectar from flowers to make honey. Nectar is a sugary liquid produced by flowering plants to attract pollinators like bees. Once collected, bees store the nectar in their stomachs and transport it back to their hive. There, worker bees break down the sugars and remove excess water by fanning the nectar with their wings, eventually converting it into honey. Pollen, which bees also collect, is used mainly as a protein source for feeding their young. Honey serves as a critical food source for bees, especially during winter months.

Nitrogen is the main gas in the Earth's atmosphere, making up approximately 78% of the air we breathe. Oxygen, which is essential for the survival of most living organisms, constitutes about 21%. The remaining 1% is composed of other gases, including argon, carbon dioxide, and trace gases. While oxygen is critical for respiration and combustion, nitrogen plays an essential role in sustaining life by being a fundamental component of amino acids and proteins. The nitrogen cycle helps maintain the balance of this gas in the environment.

There are seven continents on Earth: Africa, Antarctica, Asia, Australia, Europe, North America, and South America. Each continent is unique in terms of its climate, geography, biodiversity, and culture. Asia is the largest and most populous continent, while Australia is the smallest. Antarctica is the coldest continent, largely uninhabited except for research stations. Continents are distinct landmasses, set apart by oceans, and play a significant role in Earth's ecology by supporting diverse ecosystems and human civilizations.

Animals that are active during the day are referred to as diurnal. These animals have adapted to rely on the sun's light for their daily activities, such as foraging, hunting, and social interactions. Examples of diurnal animals include most bird species, primates, and herbivorous mammals like elephants and deer. In contrast, nocturnal animals are active at night, and crepuscular animals are most active during the twilight periods of dawn and dusk. Diurnal behavior is advantageous for animals that rely on sight for capturing prey or avoiding predators.

Strawberries are unique among fruits because their seeds are on the outside rather than the inside. Each strawberry has an average of about 200 seeds on its surface. Botanically speaking, each seed is considered an individual fruit, as it develops from the flower's ovary. The strawberry is part of the Rosaceae family, which also includes roses and apples. These fruits are rich in vitamins and antioxidants, making them a healthy and popular choice worldwide. Strawberries are often consumed fresh, in desserts, and as flavorings in various food products.

The Pacific Ocean is the largest and deepest ocean in the world, covering more than 63 million square miles (165 million square kilometers). It stretches from the Arctic Ocean in the north to the Southern Ocean in the south and is bounded by the continents of Asia, Australia, the Americas, and Antarctica. The Pacific Ocean is home to the Mariana Trench, the deepest oceanic trench in the world, which plunges over 36,000 feet (about 10,973 meters) deep. The ocean plays a critical role in global weather and climate patterns, influencing temperatures and rain cycles worldwide.

Jupiter is the largest planet in our solar system, with a diameter of about 86,881 miles (139,822 kilometers). It is a gas giant, primarily composed of hydrogen and helium, and has a very strong magnetic field. Jupiter has a Great Red Spot, which is a massive storm that has been raging for hundreds of years. It also has at least 79 moons, with the four largest being Ganymede, Io, Callisto, and Europa. Jupiter's immense size and mass have a significant impact on the solar system, affecting the orbits of other objects.

On a clear day, the sky appears blue because molecules in the Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels in shorter, smaller waves, which is why we see a blue sky most of the time. This phenomenon is known as Rayleigh scattering. The Earth's atmosphere is composed of various gases, but nitrogen and oxygen are the primary ones that scatter sunlight. At sunrise and sunset, the sky can appear red or orange because the sun's light passes through more of the atmosphere, reducing the shorter wavelengths.

The lion is often referred to as the King of the Jungle due to its majestic appearance, strength, and position as a top predator. Despite the name, lions typically inhabit savannas and grasslands rather than jungles. These social animals live in groups called prides, which consist of related females, their offspring, and a small number of adult males. Lions play a crucial role in their ecosystem by maintaining the balance of other animal populations. They symbolize power, courage, and nobility in various cultures around the world.