Q: Visible light passes through glass. Other types of electromagnetic radiation are able to pass through other materials in a similar way. Which of the following are used in medical technology because they can pass through some parts of the human body? OPTIONS:
- x-rays
- infrared waves
- microwaves
- ultraviolet rays
A: x-rays

The elements sulfur (S) and oxygen (O2) combine to form a substance called sulfur dioxide (SO2). Sulfur dioxide is also formed when coal and oil are burned. Sulfur dioxide can best be described as
OPTIONS:
- a metal
- an atom
- a compound
- a nonreactive gas

a compound

Q: Which is a nonrenewable natural resource that is used to make electrical energy? ---- OPTIONS:
- coal
- wind
- water
- thermal

A: coal

Which human body system produces the hormones that regulate growth?
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OPTIONS:
- skeletal
- digestive
- circulatory
- endocrine

endocrine

Question:
Index fossils help scientists estimate the age of a rock because index fossil species only existed for a relatively short time. What happened to the species that are now used as index fossils?
OPTIONS:
- They became extinct.
- They changed their diets.
- They hid in marine sediments.
- They migrated to new environments.
Answer:
They became extinct.

[Q]: The burning of fossil fuels has increased the carbon dioxide content of the atmosphere. What is a possible effect that the increased amount of carbon dioxide is likely to have on our planet?
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OPTIONS:
- A warmer climate
- A cooler climate
- Lower relative humidity
- More ozone in the atmosphere
****
[A]:
A warmer climate