Problem:OPTIONS:
- flooding
- rainfall
- salt and water.
- weathering
- freezing
- chilling
- frosting
- mines

Fact 1: Weathering means breaking down rocks from larger whole into smaller pieces by weather. Fact 2: Erosion breaks the rock down again, and the cycle continues. Given the two facts above, what means that rocks are eroded down again?
****
A: weathering

Problem:OPTIONS:
- genus
- tiny
- death
- living
- live
- deadly
- alive
- dead

Fact 1: Fossils are formed when layers of sediment cover the remains of organisms over time. Fact 2: If death occurs in a hospital, the remains are moved to the hospital morgue for the 24 hour period. Given the two facts above, when an organism has been covered and a fossil created, that organism is:?
****
A: dead

Problem:OPTIONS:
- bacteria
- humans
- vertebrates
- lichens
- invertebrates
- athletes
- matter vibrating
- people

Fact 1: Vertebrates are animals that have a backbone. Fact 2: Invertebrates are animals who lack a backbone or spinal column. Given the two facts above, what has a spinal column?
****
A: vertebrates

Problem:OPTIONS:
- mechanical
- negative
- helpful
- wind
- healthy
- forces
- positive
- flooding

Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Forests provide a clean and comfortable environment. Given the two facts above, erosion of soil has what impact on a forest?
****
A:
negative