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Lab Quiz 3
| Question | Answer |
|---|---|
| What causes cultural eutrophication? | Too many nutrients get into water |
| What are the effects of cultural eutrophication? | Algal Bloom Decomposers do cellular respiration oxygen in water is depleted |
| What causes a high level of BOD? How does it affect DO? | is a result of much organic waste in water. Affects because bacteria have a higher demand for oxygen |
| Give example of a point source of pollution | Waste water Plant, and CAFO's |
| Give example of a non point source of pollution | Fertilizers used on lawns and crops livestock on grazing land |
| What are some ways individuals can prevent cultural eutrophication | reduce fertilizers use phosphate free detergent |
| Can a body of water recover? How? | Yes. After algae use up nutrients in water, theres less food so fewers of them BOD declines and DO rises |
| What are some contributing factors for HIGH DO results | sampling occured in afternoon when algae were doing photosynthesis Water fountain aerates water in pond sampling in shallow water |
| Which test would you perform to see if there are pathogens? | Coliform |
| Turbidity | is a measure of clarity of water |
| What causes high turbidity | excessive sediment |
| Describe relationship between DO and BOD | A high BOD can cause Do to be lower |
| Describe relationship between temp and DO% saturation | colder water can hold more DO than warmer |
| Why was 1 pea marked (What does each pea represent) | Each pea represents one particular atom. Marked to see when removed. |
| Spontaneous | cant predict |
| steady | rate of decay is steady or predictable |
| Irreversible | decay is irreversible |
| Would half life be different if you used 1000 instead of 100? | No because half life is constant |
| Which does radiation seem to have a greater effect on germination or growth of radish? | Growth even when reduced to small amt of rad grew smaller |
| 4m rads | lethal dose |
| What are the sub lethal effects of radiation on the cells of living organisms | mutations |
| What makes some cells more sensitive to effects of radiation than others? | Sensitive cells tend to divide more rapidly |
| Sources of rad | Natural-rocks Anthropogenic-tobacco |
| What was the hypothesis for the radish lab | Radiation henders growth |
| What was the prediction for the radish lab | the higher the rad less growth |
| What was the dependent variable for the radish lab | germination of radish seeds and growth of radish seedlings |
| What was the controlled variables for the radish lab | same seeds |
| What was the independent variable for the radish lab | radiation dose |
| What was the control group for the radish lab | the group of seeds that didnt have any radiation |
| What was the hypothesis for the solar energy lab | less dense will get hotter |
| What was the dependent variable for the solar energy lab | Heat |
| What was the controlled variables for the solar energy lab | Same container, time, amount of energy |
| What was the independent variable for the solar energy lab | different fluids |
| What was the prediction for the solar energy lab | water holds the best heat |
Created by:
Hier snipe