Water Pollution
what is true?
what is point source and nonpoint source pollution?
anything that occurs naturally in the environment and is used by humans
what are natural resources?
the pursuit of knowledge and understanding of the world through observation and experiments
what is science?
an educated guess
What is a hypothesis?
4 sources of freshwater pollution
what is thermal pollution, sewage, sediments, and chemicals?
types of outdoor air pollution
what is smog, emissions, and acid rain?
what is a renewable and nonrenewable resource?
a series of logical steps for testing a possible answer to a question
what is the scientific method?
all of the continents were joined together as one big land mass
what is Pangea?
2 threats to ocean water quality
what is freshwater runoff and human activities?
types of indoor pollution
allergens and indoor gases
4 human activities that affect land and soil
name three variables that are to be present in all experiments
independent, dependent, and control
a naturally occurring solid mixture of one or more minerals
what is rock?
4 ways to reduce water pollution
What is protecting the ocean, cleaning oil spills, improving farming methods, and reducing pollutants
reducing emissions, changing energy usage, and protecting the ozone layer
A way humans have contributed to deforestation
What is physical growth of urban areas?
true or false: a scientific theory is a broad explanation of phenomena, whereas a scientific law is an observation of specific natural events under given circumstances
what is true?
name three units used to measure temperature
Fahrenheit, Celsius, Kelvin
how much fresh water can be found on Earth
what is 3 percent?
define ozone
gases that react to sunlight to produce a form of oxygen
What is wildlife habitat is lost as land and is cleared to make way for ubran population increases?
name the measuring system that is used by scientist
what is the metric system?
name two types of waves
mechanical and electromagnetic