Question

sun angle temperature trend

1. a person in australia says its summer in december. how is that possible?
2. why do places near the equator have almost no seasonal temperature change?
3. explain how the angle of sunlight affects the intensity of heat energy at a location.

part 4: challenge questions
think creatively! you may use diagrams or arrows to support your answers.

1. suppose earths tilt increased to 30° — predict how that would change the seasons.
2. how do the changing constellations in the night sky provide evidence for earths revolution?
3. how does understanding earths tilt and orbit help astronauts plan space missions or satellite orbits?

Explanation:

1. The Earth is tilted on its axis and has a seasonal cycle. December is in the southern - hemisphere summer because when the Earth is in its orbit, the southern hemisphere is tilted towards the Sun during this time.
2. Places near the equator receive direct sunlight throughout the year due to the Earth's tilt and orbit. The angle of sunlight hitting the equator doesn't change significantly, so there is little seasonal temperature variation.
3. The more direct the angle of sunlight (closer to 90°), the more concentrated the heat energy at a location. When sunlight hits at a low angle, the energy is spread out over a larger area, resulting in less intense heat.
4. If Earth's tilt increased to 30°, the seasons would become more extreme. The difference between summer and winter temperatures would be greater, and the areas experiencing polar - like conditions would expand.
5. As Earth revolves around the Sun, our vantage point in space changes. Different constellations become visible at different times of the year. This is because our view of the night sky is affected by Earth's position in its orbit, providing evidence of revolution.
6. Understanding Earth's tilt and orbit helps astronauts and satellite operators plan trajectories. It allows for predicting Earth's position and orientation in space, which is crucial for communication, avoiding the Earth's shadow (for power - generating solar panels), and ensuring proper coverage for satellites.

Answer:

1. The southern hemisphere is tilted towards the Sun in December.
2. They receive direct sunlight throughout the year.
3. Direct sunlight means more concentrated heat energy.
4. Seasons would be more extreme.
5. Earth's position in its orbit changes the visible constellations.
6. Helps in predicting Earth's position and orientation for space missions and satellite orbits.