D847 is a broad foundation course in Earth science. WGU's guidebook describes Earth's position in the universe and its dynamic systems: the geosphere, hydrosphere, biosphere and atmosphere, and how they interact.
It appears in WGU's Science Education guidebooks. The breadth is the main hurdle. Students need to move from orbits and seasons to weather, erosion, earthquakes and sustainability, and explain how each links to the others.
Course at a Glance
| Item | Details |
|---|---|
| University | Western Governors University (WGU) |
| Course code | D847 |
| Program | BS Science Education (Secondary) |
| Size | 3 competency units (lab is 1) |
| Subject area | Earth science |
| Companion course | D848 General Earth Science I Lab |
What D847 Covers
| Competency (summarized) | In practice |
|---|---|
| Describe how Earth systems interact | How the biosphere, hydrosphere, atmosphere and geosphere create conditions on Earth |
| Interpret data on human and Earth impacts | Reading data about human activity on Earth and Earth on people |
| Relate Earth patterns to its place in the universe | Orbit, tides, seasons and the solar system |
The description also lists weathering, erosion, soil formation, earthquakes, volcanoes, resource management, land use, pollution and sustainability.
Key Concepts Explained
Systems and Feedback
Earth's subsystems exchange matter and energy. A change in one produces changes in others, sometimes amplifying (positive feedback) and sometimes dampening (negative feedback).
Example: Melting sea ice exposes darker ocean, which absorbs more sunlight, which warms the water and melts more ice. This is a positive feedback linking cryosphere, hydrosphere and atmosphere. A strong answer names the loop and its direction.
Seasons and Tides
Seasons come from the tilt of Earth's axis, not its distance from the Sun. Tides result mainly from the Moon's gravitational pull. These are common misconceptions to be able to correct.
Interpreting Data
Read graph axes, units and trends carefully. State what the data shows, then what it suggests, and keep these two statements separate.
Typical Assignments and How to Approach Them
The guidebook does not name assessments. These are the kinds of work the competencies suggest.
| Work type | What it tests | How to approach it |
|---|---|---|
| Systems explanation | Interactions across subsystems | Name two subsystems and trace the link |
| Data interpretation | Human and natural impacts | Describe the trend, then offer an explanation |
| Space and orbit reasoning | Solar system context | Draw a diagram and label tilt and orbit |
| Concept questions | Vocabulary and processes | Use precise terms such as weathering versus erosion |
A Competency-by-Competency Study Approach
- Systems. Draw the four subsystems and arrows for each exchange of water, carbon and energy.
- Human impact. Choose three examples, such as land use or pollution, and trace the effects.
- Solar system. Practice diagrams of orbit, tilt, seasons, tides and moon phases.
Linking the Four Earth Systems
Questions often ask how one system affects another. Practice with this grid.
| Link | Example |
|---|---|
| Atmosphere to hydrosphere | Rainfall feeds rivers and groundwater |
| Hydrosphere to geosphere | Flowing water erodes and deposits sediment |
| Geosphere to atmosphere | Volcanic gases alter air composition |
| Biosphere to all | Plants affect soil, water cycling and carbon in the air |
Frequent Earth Science Slips
- Explaining seasons by distance from the Sun.
- Treating weather and climate as the same thing.
- Mixing up weathering, erosion and deposition.
- Describing human impact without evidence from data.
- Ignoring feedback loops between systems.
Worked Example: Reading a Climate Graph
A graph shows global average temperature over 140 years with year-to-year ups and downs but a rising overall trend. A strong answer separates the two: short-term variation reflects natural fluctuation, while the long-term trend indicates sustained warming.
It then links to systems, noting that greenhouse gases in the atmosphere affect the energy balance, which affects ice and ocean temperature. Finally, it states the limits of the graph, such as what it cannot say about local weather.
Where Students Get Stuck
- Treating topics separately. The course expects links between systems.
- Common misconceptions. Seasons and tides are classic examples.
- Weathering versus erosion. Weathering breaks down material in place; erosion moves it.
- Reading graphs hastily. Check axes and units first.
Study Tips for D847
- Use concept maps instead of long notes.
- Pair every process with a real place or event.
- Take the lab in step to use ideas on real data.
- Test yourself by explaining a process aloud.
How We Help with D847
Send your notes, practice questions or draft explanations. A tutor can explain processes, build revision tables or review written answers. For lab write-ups see our lab report guide.
GradeEssays is independent and not affiliated with Western Governors University. Use our help as a study aid, then complete your own work under WGU's academic integrity policy. We do not take exams or access portals, and we cannot promise a competency decision. Free revisions; full refund if late.
Make D847 Earth Science Click
Share the topics you find hardest. We build review tables and worked explanations.
Start My D847 HelpFree revisions · Full refund if late · Written from scratch for your order
Frequently Asked Questions
Earth's place in the solar system, its four subsystems and interactions, geological processes, human impact and sustainability, per WGU's guidebook.
3 in the BS Science Education guidebook, with a 1-unit lab.
No. The focus is on concepts and interpreting data.
Because Earth's axis is tilted relative to its orbit, not because of changing distance from the Sun.
D848 is the matching lab.
No. We offer tutoring and review materials only.