What is the main cause of seasons on the Earth? a. the distance between Earth and the sun b. the tilt of Earth's axis c. the speed the Earth travels around the sun d. changes in the amount of energy coming from the sun

Loss of calcium from bones is called... a. cystic fibrosis b. osteoporosis c. tuberculosis d. endocytosis

Which mammal group gives birth to undeveloped young that are kept in pouches? a. monotremes b. pangolins c. marsupials d. pachyderma

One of the risks of exposure to high levels of noise is called tinnitus, which means: a. a permanent loss of hearing b. a persistent ringing or hissing in the ears c. a temporary loss of hearing d. abdominal discomfort

The study of poisons is called: a. oncology b. toxicology c. phrenology d. ergonomics

Which of the following is considered a renewable resource? a. coal fired power plant b. hydroelectric dam c. combustion turbine facility d. nuclear fission power plant

Saltwater freezes at... a. the same temperature as fresh water b. a slightly higher temperature than fresh water c. a slightly lower temperature than fresh water d. saltwater does not freeze

Occasionally, a bad cold will cause a decrease in a person's hearing ability. What is the name of the tube that becomes blocked to cause this problem? a. esophagus b. occipital tube c. narietal opening d. eustachian tube

In daylight, the human eye is most sensitive to which color? a. green b. red c. blue d. orange

If an individual is suffering from emphysema, what organ of the body is primarily affected? a. heart b. skin c. liver d. lungs

What vitamin complex includes thiamine, niacin, and riboflavin? a. vitamin A b. vitamin B c. vitamin C d. vitamin D

About how long does it take for light to travel from the sun to the Earth? a. 9-10 seconds b. 9-10 minutes c. 9-10 days d. 9-10 years

The Statue of Liberty is green because of... a. green stone b. oxidized brass c. steel painted green d. oxidized copper