This science worksheet helps students visualize Earth's orbit and define key terms like solstice and equinox.

Let’s solve this step by step.

---

Part I: Label the season for each hemisphere

We are given a diagram of Earth orbiting the Sun, with 4 positions labeled 1 to 4. We need to figure out what season it is in the Northern and Southern Hemispheres at each position.

Remember:
- When the North Pole is tilted toward the Sun → Summer in Northern Hemisphere, Winter in Southern Hemisphere.
- When the North Pole is tilted away from the Sun → Winter in Northern Hemisphere, Summer in Southern Hemisphere.
- When neither pole is tilted toward or away (equal daylight) → Spring or Autumn, depending on direction of orbit.

Also remember: Earth orbits counterclockwise around the Sun (as shown in most diagrams like this).

Let’s label the positions based on tilt:

→ Position 1: Top of circle — if we assume standard orientation, this is likely when the Northern Hemisphere is tilted *away* from the Sun? Wait — let’s think carefully.

Actually, in standard diagrams:

- Position where Northern Hemisphere tilts toward Sun = Summer Solstice (June) → that’s usually drawn on the right side of the orbit (if Sun is center, and Earth moves counterclockwise).
- Position where Northern Hemisphere tilts away = Winter Solstice (December) → left side.
- Top and bottom = equinoxes.

But since the diagram doesn’t show axial tilt visually, we have to infer from common textbook layouts.

In most such diagrams:

- Position 1 (top): Vernal Equinox (March) → Spring in North, Autumn in South
- Position 2 (left): Winter Solstice (Dec) → Winter in North, Summer in South
- Position 3 (bottom): Autumnal Equinox (Sept) → Autumn in North, Spring in South
- Position 4 (right): Summer Solstice (June) → Summer in North, Winter in South

Wait — but let’s double-check using logic.

Assume Earth rotates counterclockwise around Sun.

At position 4 (right), if the Northern Hemisphere is tilted toward the Sun → summer there.

At position 2 (left), Northern Hemisphere tilted away → winter.

Then top (position 1) would be after winter, before summer → spring in North.

Bottom (position 3) would be after summer, before winter → autumn in North.

So:

1. Northern: Spring
Southern: Autumn

2. Northern: Winter
Southern: Summer

3. Northern: Autumn
Southern: Spring

4. Northern: Summer
Southern: Winter

That matches standard seasonal progression.

---

Part II: Match term with definition

Terms:

1. Solstice → C. Imaginary line Earth spins around? No — wait, solstice is when the Sun reaches its highest or lowest point in the sky — so longest/shortest day. That’s D: Beginning of Summer or Winter.

2. Equinox → A. The beginning of Fall and Spring — yes, because day and night are equal.

3. Axis → C. Imaginary line Earth spins around — correct.

4. Rotation → B. To spin on an axis — yes, daily spin.

5. Revolution → E. To travel an orbit around another object — yes, yearly trip around Sun.

6. Hemispheres → F. Northern and southern halves of the Earth divided by the equator — perfect.

So matching:

1. Solstice → D
2. Equinox → A
3. Axis → C
4. Rotation → B
5. Revolution → E
6. Hemispheres → F

---

Final Answer:

Part I:

1. Northern: Spring
Southern: Autumn

2. Northern: Winter
Southern: Summer

3. Northern: Autumn
Southern: Spring

4. Northern: Summer
Southern: Winter

Part II:

1. D
2. A
3. C
4. B
5. E
6. F