Question

part b: written response

1. explain the difference between earth revolving and earth rotating.
2. explain why even though the north pole is tilted toward the sun in summer its temperatures are still very cold.
3. in the northern hemisphere, on which date do we have the most hours of daylight?
4. in the northern hemisphere, on which date do we have the least hours of daylight?
5. describe the position of earth when a person might get a sunburn in

a) canada
b) australia

1. what other factors do you think influence the rate of warming of a particular spot on earths surface.

Explanation:

1. Earth rotating is its spin on its axis (takes about 24 hours), creating day - night cycle. Earth revolving is its orbit around the Sun (takes about 365.25 days), causing seasons.
2. Despite the North Pole being tilted towards the Sun in summer, its temperatures are cold as the Sun's rays are spread over a large area due to the pole's curvature, and there is a lot of ice and snow which reflect sunlight.
3. In the Northern Hemisphere, the summer solstice (around June 21) has the most hours of daylight as the North Pole is tilted most towards the Sun.
4. In the Northern Hemisphere, the winter solstice (around December 21) has the least hours of daylight as the North Pole is tilted most away from the Sun.
5. a) In Canada, a person might get a sunburn when Earth is positioned such that the Northern Hemisphere is tilted towards the Sun, typically during summer months. b) In Australia, a person might get a sunburn when the Southern Hemisphere is tilted towards the Sun, during Australian summer.
6. Factors influencing the rate of warming of a particular spot on Earth's surface include cloud cover (blocks or allows sunlight), altitude (higher altitude is cooler), proximity to water (water moderates temperature), land type (dark surfaces absorb more heat), and atmospheric composition (presence of greenhouse gases).

Answer:

1. Rotating is spinning on axis, revolving is orbiting Sun.
2. Sun's rays spread, ice/snow reflection.
3. Around June 21 (summer solstice).
4. Around December 21 (winter solstice).
5. a) When Northern Hemisphere is tilted towards Sun. b) When Southern Hemisphere is tilted towards Sun.
6. Cloud cover, altitude, proximity to water, land type, atmospheric composition.