四年级学生十万个为什么，英语提问与解答之旅

随着教育的不断深入，四年级的学生们已经具备了一定的英语基础，在这个阶段，他们开始对周围的世界充满好奇，常常会有各种各样的疑问，为了满足这些“小问号”们的求知欲，我们特此举办了一场“四年级十万个为什么提问并答英语”的活动，以下是一些精选的问题及相应的解答，让我们一起踏上这场英语提问与解答的旅程。

动物世界

问题1：Why do birds fly south for the winter?

解答1：Birds fly south for the winter because it is too cold in the north during that time. They migrate to warmer climates to find food and to avoid freezing temperatures.

问题2：Why do some animals hibernate?

解答2：Some animals hibernate because they need to conserve energy during the winter months when food is scarce. By hibernating, they can survive on the fat reserves they have stored up.

自然科学

问题3：Why does the sky appear blue?

解答3：The sky appears blue because of the scattering of sunlight by the Earth's atmosphere. When sunlight enters the atmosphere, shorter blue wavelengths scatter more than longer red wavelengths, making the sky appear blue.

问题4：Why do plants need sunlight?

解答4：Plants need sunlight to perform photosynthesis, a process by which they convert light energy into chemical energy. This energy is used to produce glucose, which plants use for growth and energy.

人文社会

问题5：Why do we celebrate New Year's Eve?

解答5：We celebrate New Year's Eve to mark the end of one calendar year and the beginning of another. It is a time to reflect on the past, make resolutions for the future, and enjoy festive activities with family and friends.

问题6：Why do we have different national holidays?

解答6：Different national holidays are celebrated to honor significant events, people, or historical milestones in each country's history. For example, Independence Day in the United States commemorates the country's independence from British rule.

日常生活

问题7：Why do we need to brush our teeth every day?

解答7：We need to brush our teeth every day to remove food particles, bacteria, and plaque that can lead to tooth decay and gum disease. Good oral hygiene helps maintain healthy teeth and gums.

问题8：Why do we need to wear sunscreen?

解答8：We need to wear sunscreen to protect our skin from harmful ultraviolet (UV) rays from the sun. UV rays can cause sunburn, skin damage, and increase the risk of skin cancer.

科技发展

问题9：Why do we use satellites in space?

解答9：We use satellites in space for various purposes, such as communication, weather forecasting, navigation, and scientific research. Satellites can send and receive signals from Earth, enabling us to stay connected and gather valuable data.

问题10：Why do we need computers?

解答10：We need computers because they are powerful tools that can process, store, and analyze large amounts of data quickly and efficiently. Computers are used in almost every aspect of modern life, from education to entertainment and business.

通过这场“四年级十万个为什么提问并答英语”的活动，学生们不仅拓宽了知识面，还提高了自己的英语表达能力，在未来的日子里，让我们继续激发孩子们的求知欲，用英语探索这个世界的奥秘。