23. Which of the following does NOT describe an effect of the Industrial Revolution?
a. Fossil fuels became more important energy sources
b. The amount of land and labor needed to produce food increased
c. Artificial substances replaced some animal and plant products
d. Machines replaced human muscle and animal power
B
28. Good experiments have to key characteristics; they are
a. an experimental group and a confirmed hypothesis
b. analysis of the control group and an accurate prediction of the outcome
c. conducting the actual experiment and reporting the results
d. testing a single variable and using a control
No idea..
32. The two primary types of ocean currents are
a. wind and global currents
b. warm and cold water currents
c. ocean floor and gulf currents
d. surface and deep currents
D
35. Which of the following is an example of energy transfer from the sun to a producer and then to a consumer?
a. sun warms rocks; squirrels climb over rocks; squirrels are eaten by other animals
b. sunlight helps plants grow; deer eats plants; coyote eat deer
c. sun heats pond water; fish swim in water; bears eat fish
d. none of the above
B
38. Two threats to ocean ecosystems are
a. nutrient runoff and industrial waste discharges
b. over fishing and entanglement of marine mammals in trawl nets
c. sewage and algal blooms
d. all of the above
Not sure..
Thanks
-MC
you have been very impolite to this student you have not helped him only mocked him, grow up.
wich of the following does not describe an effect of the industrial revolution
28. Good experiments have two key characteristics: testing a single variable and using a control. To conduct a good experiment, you need to isolate and manipulate one variable to determine its impact on the outcome. Additionally, using a control group allows you to compare the results of the experimental group with a group that has not been subjected to the manipulation. This helps to establish cause and effect relationships and ensure that any observed changes can be attributed to the manipulated variable.
38. Two threats to ocean ecosystems are nutrient runoff and industrial waste discharges, overfishing, and entanglement of marine mammals in trawl nets, and sewage and algal blooms. Nutrient runoff occurs when excess fertilizers from agriculture or other sources enter water bodies, causing imbalances and harmful effects on marine life. Industrial waste discharges involve the release of pollutants, chemicals, or other harmful substances by industries into the ocean, leading to pollution and ecosystem damage. Overfishing refers to the excessive harvesting of fish beyond sustainable limits, disrupting the natural balance and depleting fish populations. The entanglement of marine mammals in trawl nets can lead to injuries or death. Sewage discharge introduces human waste and contaminants into the ocean, impacting water quality and marine life. Algal blooms occur when certain types of algae grow rapidly and densely, often due to eutrophication caused by excess nutrients, causing harmful effects on marine ecosystems. Therefore, the correct answer is d. all of the above.