*Question*
The forest habitat of elephants has also decreased in size due to humans moving in, so the numbers of the elephants have decreased.  Having read the above passage, choose the right answer to the following question (choices are increase or decrease ):   To have less elephants, we should increase or decrease forests near them?
**Answer**
decrease

*Question*
Rougher surfaces have more friction between them than smoother surfaces.  Having read the above passage, choose the right answer to the following question (choices are more or less ):   If a surface were to be smoothed, it should encounter more or less friction?
**Answer**
less

*Question*
If there are more greenhouse gases in the atmosphere, more ultraviolet radiation will be trapped and the Earth will heat up.  Having read the above passage, choose the right answer to the following question (choices are more would be trapped or less would be trapped ):   What would happen to the amount of ultraviolet radiation trapped in the atmosphere if the number of greenhouse gases were decreased more would be trapped or less would be trapped?
**Answer**
less would be trapped

*Question*
The closer the charged objects are, the stronger the electrostatic force.  Having read the above passage, choose the right answer to the following question (choices are less or more ):   If we have a static charged balloon and bring it close to your head less or more hairs will stand up?
**Answer**

more