Input: Answer this question:
What is involved in creating genetically modified bacteria?
OPTIONS:
- allowing them to reproduce freely
- changing their food source
- using biotechnology techniques
- growing them on selected plants
Answer: using biotechnology techniques
*Question*: Foam weather stripping is often placed in the frames of doors and windows in a home. What is the purpose of this weather stripping? OPTIONS:
- The weather stripping increases heat transfer by radiation.
- Heat is conducted quickly through the weather stripping.
- The weather stripping reduces heat loss due to convection.
- Heat can transfer through the weather stripping due to reflection.
*Answer*: The weather stripping reduces heat loss due to convection.
question:
This in turn causes the average temperature on Earth to rise. Which of the following observations supports that theory?
OPTIONS:
- The summer of 1998 was one of the hottest summer seasons on record.
- Carbon dioxide gas from cars and industry is a product of burning that produces heat.
- Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.
- Radiation on Earth's surface is increasing because of a hole in the ozone layers.

answer:
Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.
[Q]: Sugar is composed of carbon, hydrogen, and oxygen. Sugar is an example of which of the following?
===
OPTIONS:
- an atom
- a compound
- an electron
- a mixture
****
[A]: a compound
question below:
Many natural rock formations change color over time. In Utah, for example, iron oxidized and formed red, orange, and yellow rock. Which of the following is the cause of this change?
OPTIONS:
- chemical weathering
- mechanical weathering
- water erosion
- wind erosion
answer below:
chemical weathering
How many chromosomes are in a human sperm cell?
OPTIONS:
- 12
- 23
- 46
- 58


23