*Question*
Given the fact that: As greenhouse gases increase, changes will be more extreme. Answer the question: Reid notices no change in the weather and temperature from 100 years ago. This likely was caused by increased or decreased greenhouse gas levels?
**Answer**
decreased

*Question*
Given the fact that: At higher temperatures, particles of reactants have more energy, so they move faster. They are more likely to bump into one another and to collide with greater force. Answer the question: Katie is looking at particles of reactants, and is noting that they currently are moving very quickly, and that they seem to have a lot of energy. These particles are likely at a temperature that is higher or lower?
**Answer**
higher

*Question*
Given the fact that: In erosion, a slower moving stream will only carry smaller particles. Answer the question: If the speed of a stream increases, the size of the particles carried in that stream increase or decrease?
**Answer**
increase

*Question*
Given the fact that: The longer the exposure, the more light that the telescope can gather to make the image. Answer the question: Mike needed to get a dark picture . In order to get the darkest photo, Mike made the exposure longer or shorter?
**Answer**
shorter