/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 32 Fill in the blank: When the Sun ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 4: Problem 32

Fill in the blank: When the Sun reaches the point in the sky known as the _____ , it is the first day of spring in the northern hemisphere.

Short Answer

Expert verified
Vernal equinox.

Step by step solution

01

Understanding the Context

The question is asking about a specific event that marks the beginning of spring in the northern hemisphere. This occurs because of the Earth's tilt and orbit around the Sun.
02

Identifying the Term

In the context of seasons, the term that is relevant here is 'equinox.' There are two equinoxes each year, one in March and one in September.
03

Determining the March Equinox

The vernal equinox, which occurs in March, marks the first day of spring in the northern hemisphere.
04

Completing the Sentence

The blank should be filled with 'vernal equinox,' as it is the specific term that describes when the Sun is directly above the equator, leading to nearly equal day and night.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Earth's Tilt
The tilt of the Earth is a crucial factor when it comes to understanding our planet's seasons. Earth is tilted at an angle of approximately 23.5 degrees relative to its orbit around the Sun. This tilt is not just a minor detail; it dramatically affects the distribution of sunlight across different parts of the Earth throughout the year.

Here's how it works:
  • When the Northern Hemisphere is tilted toward the Sun, it experiences summer, while the Southern Hemisphere enjoys winter.
  • Conversely, when the Northern Hemisphere is tilted away from the Sun, it experiences winter, and the Southern Hemisphere has summer.
  • During equinoxes, the Earth's tilt is such that the Sun is directly above the equator.
This tilt is what creates the different seasons we experience, as the angle at which sunlight strikes Earth changes over the year. Without the Earth鈥檚 tilt, we wouldn鈥檛 have the varied climates and seasons that define life on Earth.
Spring in the Northern Hemisphere
Spring is a time of renewal and new beginnings. In the Northern Hemisphere, it officially begins with the vernal equinox. During this period, the Sun crosses the celestial equator moving northward. This equinox is usually around March 20 or 21. It heralds the start of spring, when daytime and nighttime are nearly equal everywhere on Earth.

Following the equinox:
  • The days become longer as the Sun rises higher in the sky each day.
  • Temperatures begin to rise, melting snow and ice from winter.
  • Plants start to blossom, and animals come out of hibernation.
The vernal equinox marks a significant shift in the Earth鈥檚 environment, bringing warmer weather and more vibrant natural surroundings. It's a transition that is celebrated in many cultures around the world.
Seasonal Changes
Seasonal changes are vital for life on Earth. They result from Earth's tilt and its orbit around the Sun. As the Earth moves along its path, different areas experience varying amounts of sunlight, which leads to distinct seasons.

Understanding these changes:
  • Equinoxes, occurring in March and September, bring about nearly equal day and night as the Sun is above the equator.
  • Solstices, occurring in June and December, represent the longest and shortest days of the year.
  • Changes in temperature and day length influence natural phenomena, like migrations and plant cycles.
These seasonal shifts are not just a calendar event; they impact ecosystems, agriculture, and even human behavior. Each season brings its own unique changes and challenges, underscoring the dynamic nature of our planet.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Multiple choice: If the Moon as seen from the Earth is in the waning crescent phase, what phase of the Earth would be seen from the near side of the Moon? (a) Full. (b) Waxing gibbous. (c) Waning crescent. (d) The Earth does not go through phases as seen from the Moon. (e) The Earth's phases as seen from the Moon are unrelated to the Moon's phases as seen from the Earth.

True or false? If Earth's axis of rotation were perpendicular to Earth's orbital plane (i.e., if Earth's axis weren't tilted), there would be no major seasonal variations at a given location on Earth throughout the year.

Explain how it is that some stars never rise in our sky, and others never set

List the leap years between 1800 and \(2200 .\) How many will there be?

Multiple choice: Which one of the following is the main reason why Earth has seasons? (a) Earth's orbit is elliptical. We have summer when we are closer to the Sun and winter when we are farther from the Sun. (b) The tilt of Earth's axis of rotation causes one hemisphere of the planet to be closer to the Sun during the day than the other hemisphere. Because it is closer to the Sun, it receives much more solar energy per hour. (c) Over the course of the year, the tilt of Earth's axis of rotation varies from \(23.5^{\circ}\) to \(0^{\circ}\) in such a way as to bring more heating per hour in the summer than in the winter. (d) The tilt of Earth's axis of rotation causes the Sun to pass higher in the sky during the day in one hemisphere than in the other, thereby giving more daylight hours and more heating per hour. (e) It has seasons so that sunbathers will know when to go to the beach, and skiers will know when to go skiing.
See all solutions

Recommended explanations on Physics Textbooks

Geometrical and Physical Optics

Read Explanation

Scientific Method Physics

Read Explanation

Kinematics Physics

Read Explanation

Fundamentals of Physics

Read Explanation

Dynamics

Read Explanation

Conservation of Energy and Momentum

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.