QUESTION 1
Which part of the solid earth is in contact with the atmosphere and hydrosphere?
A.Crust
B.Mantle
C.Core
D.All of the above

QUESTION 2
Which of the following components does not belong to the Earth system?
A.Atmosphere
B.Hydrosphere
C.Middlesphere
D.Solid Earth (or lithosphere)

QUESTION 3
As of 2014, by how much has Earth's atmospheric CO2 concentration increased since the year 1800?
A.401 ppm (value in 2014) - 280 ppm (value in 1800) = 121 ppm
B.389 ppm (value in 2014) - 280 ppm (value in 1800) = 109 ppm
C.352 ppm (value in 2014) - 280 ppm (value in 1800) = 72 ppm
D.293 ppm (value in 2014) - 280 ppm (value in 1800) = 13 ppm

QUESTION 4
Which of the following is an incorrect statement for global warming or the greenhouse effect?
A.Greenhouse gases are gases that warm a planet's surface by absorbing outgoing infrared radiation (radiant heat) and reradiating some of it back toward the surface. This process is called the greenhouse effect.
B.The greenhouse effect is a natural physical process that operates in all planetary atmospheres.
C.Global warming is a warming of Earth's atmosphere caused by an anthropogenic enhancement of the greenhouse effect.
D.Global warming is a natural physical process that operates in all planetary atmosphere.

QUESTION 5
Which of the following statements about science is wrong?
A.Science focuses on the natural world and aims to explain it.
B.The process of science relies on the testing of ideas with evidence gathered from the natural world.
C.In rigorous scientific testing, if a hypothesis disagrees with experiment, then the hypothesis is wrong.
D.Scientific research is unique to each scientist who conducted it; therefore, it can not be reproduced by others.