Fact 1: Sedimentary rocks are formed by deposition. Fact 2: Limestone is a type of sedimentary rock. Given the two facts above, which rock is formed by deposition?

OPTIONS:
- soft soil
- barrel-shaped
- rivers
- Limestone
- calcite
- In sediment
- Sand dollars
- coral reefs

Answer: Limestone

Fact 1: Fertilization occurs when a sperm and an egg fuse. Fact 2: Most cephalopods have separate sexes and fertilization is internal. Given the two facts above, what type of mollusk inseminate the sperm and egg internally?

OPTIONS:
- insects
- it needs them
- graptolites
- reproduce
- barnacles
- during the day
- a fish
- Cephalopod

Answer: Cephalopod

Fact 1: Some parasites kill their host, but most do not. Fact 2: Leeches are external parasites. Given the two facts above, some what will kill their host, while others won't?

OPTIONS:
- barnacles
- producers
- scavengers
- insects
- cigarettes
- fungi
- plants
- leeches

Answer: leeches

Fact 1: The looseness of soil increases the amount of oxygen in that soil. Fact 2: Oxygen in the soil is vital for healthy roots. Given the two facts above, what in soil is vital for healthy roots?

OPTIONS:
- looseness
- nutrients
- leftovers
- compacted
- ferns
- cells
- energy
- trash

Answer:
looseness