Problem: Process: - Greenhouse gases are released into the air by human activities - The earth changes energy from the sun into heat - Heat rises from the ground - Greenhouse gas molecules in the atmosphere prevent the heat from going into space - The temperature of the earth increases - The temperature continues to rise and melts the polar ice caps - The temperature rises even faster. Question: suppose a forest burns in a forest fire happens, how will it affect Polar ice caps are getting bigger. - A: more - B: less - C: no effect

A: B

Problem: Process: - There is a rain cloud in the sky - Small bits of ice within the cloud bump each other - The collisions create electrical charge - Lighter, positively charged particles sink to the bottom of the cloud - Heavier, negatively charges particles rise to the top - When the positive and negative charges grow large enough, a giant spark, called lightning occurs - Question: suppose more oxygen in the air happens, how will it affect LESS or LESS POWERFUL lightning. - A: more - B: less - C: no effect

A: C

Problem: Process: - Coal is put in a coal-fired steam station - Water is put in pipes in the coal-fired steam station - The coal is crushed - The coal is moved into a boiler along with hot air - The water is moving through pipes in the boiler - The steam from the water is blown against a turning mechanism - The force of the steam makes the mechanism turn - The mechanism generates electricity. Question: suppose the pits are closed happens, how will it affect the plant will be more efficient. - A: more - B: less - C: no effect

A: B

Problem: Process: - Coal is put in a coal-fired steam station - Water is put in pipes in the coal-fired steam station - The coal is crushed - The coal is moved into a boiler along with hot air - The water is moving through pipes in the boiler - The steam from the water is blown against a turning mechanism - The force of the steam makes the mechanism turn - The mechanism generates electricity. Question: suppose fewer people want to use coal happens, how will it affect there is more coal available. - A: more - B: less - C: no effect

A:
A