Sun Earth Relationship
KS2 Science Earth and space learning resources for adults, children, parents and teachers. What is the solar system? What are the rocky planets? What are . Researchers debate whether Earth will be swallowed by the sun as it expands In a calculation that would thrill any college junior studying classical also slow down—physics students learn this relation as the conservation. Notice that the axis of the Earth is tilted slightly. This causes part of the Earth to lean towards the Sun, while part of it is hidden either beneath the Earth, or above .
At different latitudes, the sun will travel across the sky at different angles each day. The rotation of the earth about its axis also causes the day and night phenomenon. The length of the day and night depends on the time of the year and the latitude of the location.
For places in the northern hemisphere, the shortest solar day occurs around December 21 winter solstice and the longest solar day occurs around June 21 summer solstice. In theory, during the time of the equinox, the length of the day should be equal to the length of the night.
BBC Bitesize - KS2 Science - Earth and space
The average time the earth takes to move around the sun in approximately days. This path that the earth takes to revolve around the sun is called the elliptical path. When the sun is moving down from above the celestial equator, crosses it, then moves below it, that point of intersection between the two planes is when the Autumnal Equinox occurs. This usually happens around the 22nd of September.
- Earth and space
- day/night display
- Day and night
When the Sun moves up from below the celestial equator to above it, the point of intersection between the sun and the celestial equator is when Spring Vernal Equinox occurs. It usually happens around the 21st of March. During the equinoxes, all parts of the Earth experiences 12 hours of day and night and that is how equinox gets it name as equinox means equal night. At winter solstice Decthe North Pole is inclined directly away from the sun.
At this point it will be at declination This cycle will carry on, creating the seasons that we experience on earth. The earth is tilted At the summer solstice which occurs around 21st of June, the North Pole is pointing towards the sun at an angle of Therefore the apparent declination of the sun is positive At the Winter solstice which occurs around 21st December, the North Pole is pointing away from the sun at an angle of The view that the air and Earth form equal hemispheres and the observer is located centrally.
Nussbaum Students hold a range of views which they use to explain day and night: NussbaumSkamp These views are also evident in and related to the focus idea Forces without contact. Scientific view The Earth is one of several planets that orbit the sun, and the moon orbits the Earth. The Earth is essentially a sphere and the sun is a nearby star which is an unimaginably large ball of gas that radiates light and heat as products of nuclear reactions. The Earth orbits the sun once every days and rotates about its axis once every 24 hours.
Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. Critical teaching ideas The Earth is a sphere and the sun is a star and produces light.
The Earth and sun are part of the solar system, with the sun at its centre. An Earth day is 24 hours because the Earth spins on its axis once every 24 hours. Explore the relationships between ideas about day and night in the Concept Development Maps - Gravity, Stars, Solar System Students are often interested and highly motivated to learn about ideas about space and care must be taken to avoid the overuse of library and internet sources and to ensure that students are engaged and thinking about secondary sources of information.
Students should be encouraged to make use of observable features of astronomy. These observations can be made during the day as well as at night.
The Revolution of The Earth
They should then be guided to develop their own questions to research and explore. In this way the research is more directed and not simply a fact finding exercise. Opportunities to make models and to manipulate the models to help students explain their ideas should be provided.
The manipulation of models also assists students to view the motion of the sun, Earth and the moon from a new perspective of an observer of the whole system as opposed to their usual perspective as an observer on a very small region on the surface of the Earth. This can be used as a starting point to challenge existing ideas and to explore new ideas Research: Students could present posters or diagrams suitable for display on an overhead or data projector to help them to interpret and share new perspectives with their peers.
Some websites to visit include: Star Child designed for junior students Students could also explore indigenous interpretations of the motion of the sun and Earth.