Education Exams (Educ Gen Sci) – Page 2

#20. If a lunar eclipse occurs tonight, when is the soonest that a solar elcipse can occur?
A Tomorrow
B In one month
C In one year
D In two weeks
Answer: In two weeks
#21. Which one is considered as one of the most important results of the Apollo missions to the moon?
A Discovery of subsurface water.
B First observations of surface features called craters.
C Proof that craters were produced by volcanic eruptions.
D Determination of the age of moon rocks.
Answer: Proof that craters were produced by volcanic eruptions.
#22. What is the problem experienced by astronauts staying for long periods of time aboard the international space station?
A Weight loss due to diet
B Effects of lower gravity on the body
C Muscle loss due to lack of exercise
D Reduced exposure to sunlight
Answer: Effects of lower gravity on the body
#23. NASA developed a filtration process to make waste water on space flights renewable. Where might this filtration process be used on Earth?
A In areas where water contains hard minerals.
B In areas where water is used for recreation.
C In areas where water is contaminated.
D In areas where water is salty.
Answer: In areas where water is contaminated.
#24. What must be done in order to preserve the biosphere for future generations?
A Explore ways to drain and fill wetlands along the sea coast.
B Make use of technology to develop.
C Understand how living things interact with their environment.
D Put all wild animals and game preserves.
Answer: Understand how living things interact with their environment.
#25. Which of the following can help ensure a suitable environment for the future generations?
A Fossil fuels
B Chemical dumps
C Biological controls
D Pesticides
Answer: Biological controls
#26. Which human activity would be more likely to have a negative impact on the environment?
A Using reforestation and cover cropping to control soil erosion
B Using insecticides to kill insects that compete with human for food.
C Developing a research aimed toward the preservation of endangered species.
D Investigating the use of the biological controls for the pests.
Answer: Using insecticides to kill insects that compete with human for food.
#27. Which is the main cause of the depletion of the ozone layer?
A Decrease in temperature.
B Increase in number of marine ecosystem.
C Increase in temperature due to atmospheric pollutants.
D Decrease in the amount of air pollutants.
Answer: Increase in temperature due to atmospheric pollutants.
#28. DDT was used to kill mosquitoes. It was observed that lizards that ate the mosquitoes slowed down and died. Eventually, the population of cats that ate lizards diminished. What can be inferred from this situation?
A Using DDT is a reliable way to eliminate insect predators.
B The mosquito and other organisms were all competing for same resources
C Environmental changes that affect one population can affect other population.
D DDT can cause harm to all organisms.
Answer: Environmental changes that affect one population can affect other population.
#29. Teddy is a seasoned farmer updated on new trends in agriculture. In his effort to make and harvest the best rice crops, he tried to implement the environmentalist's way of controlling pests as mandated in the integrated pest management. Teddy later found out that all of the following processes made best contributions to a good and safe harvest EXCEPT ________.
A use of natural enemies
B planting variety of crops
C use of narrow-spectrum pesticides
D use of genetically engineered crops
Answer: use of narrow-spectrum pesticides
#30. What is the most important factor for the success of animal population?
A Inter-species activity
B Natality
C Adaptability
D Unlimited food
Answer: Adaptability
#31. Why does starvation occur?
A Population is growing at a faster rate than the world's ability to produce.
B Forces in nature (drought, pests, floods) wipe out food supplies.
C Some parts of the world lack food while other parts of the world produce more than they consume.
D There is not enough fertile land worldwide on which to grow food
Answer: Some parts of the world lack food while other parts of the world produce more than they consume.
#32. Which of the following presents the greatest threat to the survival of numerous plants and animal species.
A Continued burning of fossil fuel
B Greenhouse effect
C Disappearance of world's rainforest
D Dumping of toxic waste in the least industrialized nations
Answer: Disappearance of world's rainforest
#33. Which factor BEST explains why the human population has grown so rapidly over the last 100 years?
A Humans have increased the amount of resources available on Earth.
B Humans have developed physical characteristics that increase their competitive advantage. 35)
C Humans have increased the carrying capacity of the biosphere for the population.
D Humans have decreased their reliance on natural resources.
Answer: Humans have increased the carrying capacity of the biosphere for the population.
#34. Which human activity causes maximum environmental pollution having regional and global impact?
A Industrialization
B Agriculture
C Mining
D Urbanization
Answer: Industrialization
#35. Which of the following statements in relation to sustainable development is FALSE?
A Sustainable development is defined as the development that meets the needs of present without compromising the ability of our future generations to meet their own needs.
B Sustainable development not only considers the protection of the environment but also the maintenance of economic viability as well as social and ethical considerations.
C Sustainability has the main objective of purely focusing on the natural environment.
D Sustainable development of various countries and the entire world is the only solution left with mankind to survive for a longer period on Earth.
Answer: Sustainability has the main objective of purely focusing on the natural environment.
#36. Which of the following chemicals enters living organisms primarily from the atmosphere rather than from rocks or soil?
A Calcium
B Carbon
C Sodium
D Sulfur
Answer: Carbon
#37. What is the conversion of atmospheric free nitrogen gas to ammonia which occurs through the activities of certain bacteria and cyanobacteria?
A Denitrification
B Nitrification
C Nitrogen fixation
D Oxidation
Answer: Nitrogen fixation
#38. How do animals get the nitrogen they need?
A Directly from bacteria in the soil
B From the process of denitrification
C By consuming plants or other animals
D By breathing in atmospheric nitrogen
Answer: By consuming plants or other animals
#39. The following are ways by which phosphorous enters the environment EXCEPT ________.
A Run off
B Animal waste
C Photosynthesis in plants
D Erosion of rocks
Answer: Photosynthesis in plants