Water Basics
What is the chemical formula for water?
Answer: H2O
What is the main energy source that drives the water cycle?
Answer: the Sun
What ion do acids release in water?
Answer: H+
What is the name for rock breaking physically into smaller pieces without making a new substance?
Answer: mechanical weathering
What is the variable you change in an experiment called?
Answer: independent variable
What word describes water because its electrons are shared unequally?
Answer: polar
What is the process called when liquid water changes into gas?
Answer: evaporation
What is the pH of a neutral substance?
Answer: 7
What type of weathering happens when acid reacts with rock and forms a new substance?
Answer: chemical weathering
What chemical problem often causes algae blooms in water?
Answer: nitrates
What is the name for water sticking to itself?
Answer: cohesion
What is the process called when water vapor cools and becomes liquid?
Answer: condensation
What is a base called when it dissolves in water?
Answer: alkali
What gas from burning coal can lead to sulfuric acid forming in the atmosphere?
Answer: sulfur dioxide
What unit was used in the water testing lab to measure chemicals in water?
Answer: ppm
What is the name for the strong “skin” at the surface of water?
Answer: surface tension
What is the process called when water moves into the ground?
Answer: percolation
What ion do alkalis release in water?
Answer: OH-
What is the term for rain, snow, fog, or dust with a pH below 5.6?
Answer: acid deposition
What is the variable you measure in an experiment called?
Answer: dependent variable
What is the name for water sticking to other surfaces?
Answer: adhesion
What is the process called when water leaves plant leaves and enters the air?
Answer: transpiration
What is the reaction called when an acid and a base react together?
Answer: neutralization
What kind of rock was dissolved in the acid rain activity?
Answer: limestone
In the water testing investigation, what type of water was used as the pure sample for comparison?
Answer: DI water