*Question*
Fact 1: Friction causes an object to lose energy. Fact 2: Byproducts of friction Friction is a force acting against motion. Given the two facts above, answer the question "Force acting against motion causes what?" with the following options: - Object to lose energy. - depress neuronal excitability - body temperature reduces - kinetic energy - heat production - heat is produced - heat the body - a lot of human deaths
**Answer**
Object to lose energy.

*Question*
Fact 1: The surface of a beach is formed by mechanical weathering. Fact 2: Most beaches are of white coral sand. Given the two facts above, answer the question "What action produces much of the sand from coral?" with the following options: - reef building - radioactive decay - mechanical waves - glass blowing - It used to be covered by water - The area was once underwater - Mechanical weathering - By coral exoskeletons
**Answer**
Mechanical weathering

*Question*
Fact 1: Behaviors that improve fitness increase through natural selection. Fact 2: Many organism behaviors have evolved through natural selection. Given the two facts above, answer the question "What is one of the facets of an organism's evolution?" with the following options: - resistance - fitness - properties - thirst - movement - swimming - offspring - recycling
**Answer**
fitness

*Question*
Fact 1: Gills are used for breathing water by aquatic animals. Fact 2: Shark exhibit Come face to face with the ultimate aquatic predator. Given the two facts above, answer the question "What are gills used for breathing by sharks?" with the following options: - air - mussels - carbon monoxide - lava - fish - open - water - squids
**Answer**
water