- Instructions: On a sheet of paper, answer all 30 questions in sentences. Due Wednesday, 10/12/16.
- Check the number near the images immediately below to see to which question it refers.
Study Guide: 7th Grade - First Quarter Science Examination
Questions
- Subsidence, the sinking of the surface of the earth, would most likely be caused by what occurance?
- A student builds a model to show how pollutants move through an ecosystem. In a plastic tub, the student places a layer of small marbles, covers it with a thick cloth, and then adds a layer of sand. The student sprinkles red powdered paint on top of the soil. When the student sprays water onto the model, red color appears in the cloth and in the water in the layer of marbles. Which part of the model represents pollutants introduced by humans?
- The illustration provided shows a river and four cities on that river. When the water from the river was sampled at location X, it was determined to be polluted with various chemicals. Which cities would be the most likely sources for this pollution?
- A student sets up the investigation shown.
The movement of colored water through the gravel best models what real-world process? - Rapid growth of algae in a pond is often the result of what?
- What are some important factors that determine Earth’s
temperature? - Why does Jupiter not support life, while Earth does?
- A hypothetical solar system is shown in the diagram
provided. In this solar system, the habitable zone is between 240 and 300 million km away from the star. Which of these planets could support life? - Overflow during a heavy rainstorm from a wastewater treatment plant would result in what flowing into
- Subsidence, or the sinking of the ground because of
weakened underground rock layers, is often the result of
humans doing what underground? - A paper company wants to build a paper mill in the watershed where a village exists. In order to minimize potential pollution to the village, where should the mill be built?
- Describe characteristics of Jupiter’s moon, Europa, that make it suitable for supporting life.
- Earth’s atmosphere contains water vapor and carbon dioxide. Why are these greenhouse gases important?
- The ozone layer is degraded by certain chemicals that create holes in the ozone layer. If the presence of these chemicals significantly increases, to what would you predict organisms would be more exposed to?
- Life on Earth depends on energy from what?
- How does the ozone layer protect life on Earth?
- What could be downstream from a factory that pollutants entering the water in the local watershed would affect negatively?
- A neighborhood in a small Texas town had to be evacuated
because the houses were sinking due to a problem in the
aquifer. What is the most likely cause of this problem? - The use of pesticides and fertilizers is carefully monitored
because of the effect they can have on the environment.
What is a possible negative effect of the use
of these chemical on the environment? - Earth is currently 150 million km away from the Sun. If
Earth was 200 million km away from the Sun, why would it no
longer support life? - The layer of ozone in the upper atmosphere of Earth is
important to life because it shields Earth from what? - What are some characteristics of the planet, Earth that are
essential to the survival of every living organism? - An area experiences a long period of drought forcing towns
to pump out almost all of the water held in aquifers. What is the most likely result of this over pumping? - Name some human activities that would most likely
lead to subsidence, the sinking of the surface of the earth. - What characteristics of a planet will have the greatest influence on determining whether or not its
temperature will be suitable to support life? - If Earth were much smaller than it is now, it would not
support life because it would not have enough mass to do what? - Ozone contributes to supporting life on earth by blocking what?
- The illustration provided shows a river and four cities on that river. When the water from the river was sampled at location X, it was determined to be polluted with various chemicals. What would be the most likely source for this pollution?
- The habitable zone for the star in the diagram is
between 200 and 250 million km away from the star. Which of the planets shown in the diagram can support life?