Earth Science vocabulary matching worksheet with definitions and answer choices.

Here's the correct matching for each definition with its corresponding term from the word bank:

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1. the way an object APPEARS to move → K. apparent motion
*(Apparent motion is the perceived movement of an object, often due to perspective or relative motion — e.g., stars appearing to move across the sky.)*

2. plant material and animal waste used as FUEL → R. biomass
*(Biomass refers to organic material derived from living or recently living organisms, used as fuel.)*

3. electricity produced by the ENERGY in moving water → A. hydroelectric power
*(Hydroelectric power is generated by harnessing the kinetic energy of flowing or falling water.)*

4. The SMALLEST piece of matter → P. atom
*(An atom is the smallest unit of ordinary matter that forms a chemical element.)*

5. a planet that does NOT have a clear orbit → L. dwarf planet
*(Dwarf planets, like Pluto, orbit the Sun but haven’t cleared their orbital path of other debris.)*

6. one-HALF of Earth’s surface → G. hemisphere
*(Earth is divided into Northern/Southern or Eastern/Western hemispheres — each half of the globe.)*

7. a star SYSTEM that contains large groups of stars → S. galaxy
*(A galaxy is a massive system of stars, gas, dust, and dark matter bound together by gravity.)*

8. any fuel that formed from the REMAINS of plants and animals that lived millions of years ago → D. fossil fuel
*(Fossil fuels include coal, oil, and natural gas — formed from ancient organic remains.)*

9. the BLOCKING of light shining from one object in space onto another → E. eclipse
*(An eclipse occurs when one celestial body blocks the light of another — e.g., solar or lunar eclipse.)*

10. a LARGE rocky object that orbits a planet → H. moon
*(Moons are natural satellites that orbit planets — e.g., Earth’s Moon.)*

11. EVERYTHING that exists throughout space → N. universe
*(The universe encompasses all matter, energy, space, and time.)*

12. materials that are always being REPLACED and will not run out → J. renewable resource
*(Renewable resources, like solar or wind energy, replenish naturally over short periods.)*

13. the presence of substances that are HARMFUL to the environment or living things → B. pollution
*(Pollution refers to contamination of air, water, or soil by harmful substances.)*

14. the act of moving AROUND another object → M. revolution
*(Revolution is the orbital motion of one object around another — e.g., Earth revolving around the Sun.)*

15. the act of SPINNING around → O. rotation
*(Rotation is spinning on an axis — e.g., Earth rotating on its axis causes day and night.)*

16. resources that CANNOT be replaced quickly enough to keep from running out → Q. nonrenewable resources
*(Nonrenewable resources, like fossil fuels, take millions of years to form and deplete faster than they renew.)*

17. a ball of hot gases that give off LIGHT and other types of energy → I. star
*(Stars are luminous spheres of plasma held together by gravity — e.g., our Sun.)*

18. the PATH one object takes around another → C. orbit
*(Orbit is the curved path one object follows around another due to gravity.)*

19. a largem nearly round object in space that ORBITS a star → F. planet
*(Planets are celestial bodies that orbit a star, are nearly round, and have cleared their orbital neighborhood.)*

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✔ Final Answer Key:

1. K
2. R
3. A
4. P
5. L
6. G
7. S
8. D
9. E
10. H
11. N
12. J
13. B
14. M
15. O
16. Q
17. I
18. C
19. F

Let me know if you’d like this formatted as a worksheet answer key!