Fact 1: Soil erosion means soil loss through wind. Fact 2: Wind erosion is the movement and deposition of soil particles by wind. Given the two facts above, what erodes soil?
OPTIONS:
- mines
- sun
- earthquakes
- rivers
- animals
- wind
- mold
- rain

Answer: wind

Fact 1: Arainbow is formed by refraction of light by separating light into all different colors. Fact 2: Light rays come in through the lens. Given the two facts above, a rainbow is formed by what of rays?
OPTIONS:
- an electron microscope
- energy of moving objects
- heat energy
- Solar energy
- rain or sun shine
- separation of colors
- sun's heat
- flow of electrons

Answer: separation of colors

Fact 1: Photosynthesis means producers convert from carbon dioxide, water, and solar energy into carbohydrates for themselves. Fact 2: Primary producers convert solar energy into chemical energy. Given the two facts above, what utilize photosynthesis for chemical energy?
OPTIONS:
- Most plants
- Primary producers
- engines
- circulatory systems
- organisms
- dirt
- heterotrophs
- solar panels

Answer:
Primary producers