FREE EARTH SCIENCE AND STUDY GAMES ABOUT 8TH

PDF Download

FREE EARTH SCIENCE AND STUDY GAMES ABOUT 8TH

GRADE SCIENCE EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -30 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: Climate researchers in Greenland found an ice core sample that shows there was a period when carbon dioxide in the atmosphere decreased. What happened to the amount of energy absorbed by Earth's surface during this time?

Answer:

decreased Question 2: If more energy enters the system than leaves, the temperature on earth will become ..... Cooler or Warmer?

Answer:

warmer (think closed oven door) Question 3: In the last 5 million years of the Permian period in Earth's history, carbon dioxide in the atmosphere increased. How did energy in the Earth system change during this time?

Answer:

There was more energy in the Earth system and more energy absorbed by Earth's surface, because more energy entered than exited.

Question 4: During the Pleistocene Epoch time, methane in the atmosphere decreased. What would scientists expect to observe about the amount of energy absorbed by Earth's surface during the time periods when methane decreased?

Answer:

decreased Question 5: Scientists are using a computer simulation, they notice that more energy entered the Earth system than exited. How might the amount of carbon dioxide have changed to cause this, and how would this have changed the energy in the Earth system?

Answer:

carbon dioxide increased, leading to more energy in the Earth system and more energy absorbed by Earth's surface.Question 6: Carbon dioxide and methane increases are attributed to human activities. True or False?

Answer:

true Question 7: When carbon dioxide in the atmosphere increases, the amount of energy absorbed by Earth's surface should

Answer:

increase Question 8: Methane affects the atmosphere in much the same way that carbon dioxide does?True or False?

Answer:

true Question 9: Scientists study tree rings to learn more about Earth's past climate. They found a time period when the amount of carbon dioxide in the atmosphere decreased. What happened to energy in the Earth system when carbon dioxide in the atmosphere decreased?

Answer:

decreased, because less energy entered than exited. This is because less exiting energy was redirected (bounced) back toward Earth.

Question 10: There is nothing that humans can do to change the carbon dioxide and methane.True or False?

Answer:

false Question 11: What can humans do to help keep carbon dioxide and methane in Earth's atmosphere from increasing?

Answer:

Drive their cars less often AND eat less meat so that fewer livestock need to be kept Question 12: Some bacteria produce methane during digestion. If the amount of these bacteria decreased a lot, the amount of methane in the atmosphere would decrease. What would happen to energy in the Earth system if this happened?

Answer:

there would be less energy in the Earth system and less energy absorbed by Earth's surface, because less energy would enter than exit.Question 13: Sulfur dioxide that is emitted from an erupting volcano will cause the atmospheric temperature to increase.True or False?

Answer:

false Question 14: When making an argument about how climate change is affecting the ice cover on Earth, what would be the least effective type of evidence to support your argument?

Answer:

data tracking glacier size for only a few years (many years is better)

Question 15: Which occurs over a long period of time? Fluctuation or Trend?

Answer:

trend Question 16: What is one reason that carbon dioxide is increasing in the atmosphere today?

Answer:

There are more people doing things that use combustion.

Question 17: Scientists found evidence of a time period 3 billion years ago when less energy entered the Earth system than exited. What is one change to the atmosphere that could have caused this, and how did it change the amount of energy in the Earth system?

Answer:

Methane decreased, leading to less energy in the Earth system and less energy absorbed by Earth's surface.Question 18: About 360 to 299 million years ago, swampland on Earth increased, which may have led to a large increase in the amount of methane in Earth's atmosphere. What happened to energy in the Earth system when the amount of methane in the atmosphere increased?

Answer:

increased, because more energy entered than exited. This is because more exiting energy was redirected (bounced) back toward Earth Question 19: Climate scientists looking at one period of time in the simulation see that more energy entered the Earth system than exited. How could the amount of methane have changed to cause this, and what effect would this have on energy in the Earth system?

Answer:

Methane increased, leading to more energy in the Earth system because more exiting energy was redirected (bounced) back toward Earth.Question 20: Decreased carbon dioxide in the atmosphere will cause the earth's temperature to cool. True or False?

Answer:

true Question 21: There is a trend of increasing temperatures on Earth since about what year?

Answer:

1880 Question 22: Increased carbon dioxide in the atmosphere will cause the earth's temperature to cool. True or False?

Answer:

false