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5th Science Enviro S
5th Grade Science Environments Test Study
Question | Answer |
---|---|
% of all water on earth that is Salt Water | 97 |
% of all water on earth that is Fresh Water | 3 |
% of all freshwater that is Liquid | 1 |
% of all freshwater that is frozen | 3/4 |
Pollutants can make water | Unpleasant for drinking or washing |
Pollutants can cause | Sickness and even death |
Environmental issues fall into three categories | Resource Use, Population Growth, Pollution |
There are unique wildlife habitats and valuable minerals beneath its thick ice | Antartica |
Renewable Resources include | Sunlight, wind, fresh water and trees |
In about 1650 AD what improvements enabled people to live longer? | Medicine, agriculture and waste disposal |
When the population grows the demand for this also grows | Resources |
Pollution can be related to | Resource use and population growth |
Environmental decision can be made at which levels? | Personal, local, national or global |
Every decision has some impact on the | Environment |
Environmental decision making requires a delicate balance between | The needs of the environment and the needs of the people |
To help balance the different opinions on an environmental issue, decision makers weigh the | Costs and benefits of the proposal |
Costs and benefits are often | Economic (Provide jobs? Cost too much?) |
Costs for changing ecosystems can also be | Ecological |
It is important to consider both | Short term and long term costs and benefits |
Once you have identified the potential costs and benefits of a decision you must then | Analyze them |