Erosion causes deposition, and silica sand is primarily mined from sandstone deposits. Given these facts, what forms silica sand among the following options: - Sediment - loose soil - sunlight - fire - soft soil - erosion - gasoline - rocks
erosion

Acid rain has a negative impact on water quality, and acid rain is partly caused by CFCs. Given these facts, what have a negative impact on water quality among the following options: - CFCs - oxygen - hydrogen - oil - h2o - mines - fungi - Cars
CFCs

Q: Running water is better able to dissolve oxygen and nutrients than standing water, and water is made up of H2O molecules. Given these facts, what dissolves oxygen better when running than standing among the following options: - H2O - NaCl - pH - CO2 - CO 2 - O2 - O3 - H20
A: H2O

Question: Migration is a type of movement that changes population size, and movement is thought in motion. Given these facts, migration changes population size via what among the following options: - wind - forces - abrasion - motion - distance - vehicles - Movement - speed
Answer: motion

*Question*
Aflower 's purpose is to produce seeds, and reproduction is by seeds and spreading rhizomes. Given these facts, a flower 's purpose among the following options: - protection - photosynthesis - it needs them - reproduction - circulatory system - Plant reproduction - camaflouge - genetic diversity
**Answer**
reproduction

Zooplankton are tiny animals that feed on phytoplankton, and scientists have shown that ocean organisms known as zooplankton harbor cholera bacteria. Given these facts, what ocean organisms feed on phytoplankton among the following options: - gills - fungi - a fish - life - CO 2 - edible - sharks - tiny
tiny