Water moves from the sky to the ground and back up again in a continuous, repeating ________. 2. Plastics...

1. Water moves from the sky to the ground and back up again in a continuous, repeating ________.
2. Plastics and synthetic fabrics are ________ materials because they are manufactured by humans.
3. Scientists describe a rock by examining its ________ such as its rough texture and gray color.
4. All the physical stuff in the universe that has mass and takes up space is known as ________.
5. Unlike matter, which is recycled endlessly, the movement of solar ________ is a one-way path.
6. Plants absorb sunlight to grow, demonstrating the steady ________ of nutrients from the soil to the leaves.
7. High up in the arctic tundra, polar bears must adapt to a freezing, harsh ________.
8. A coral reef is a complex ________ where fish, plants, and ocean water interact closely.
9. A backyard ________ relies on waste from tilapia fish to provide nutrients to grow fresh lettuce leaves.
10. Solar panels provide a ________ source of power that meets our needs without destroying future resources.