Q: What is the name of earth's only natural satellite? A:

OPTIONS:
- sun
- titan
- venus
- moon

Answer: moon

Problem: OPTIONS:
- igneous metals
- actinides
- lanthanides
- alkali metals
Q: Q: Which group of metals in the periodic table include elements such as sodium and potassium? A:
Answer: alkali metals

Problem:OPTIONS:
- undisrupted community
- calm community
- even community
- climax community

Q: Most ecosystems are disturbed too often to attain what final, stable status? A:
****
A: climax community

Q: What helps cells take up glucose from the blood? A:
OPTIONS:
- oxygen
- hemoglobin
- estrogen
- insulin
insulin

Q: While components of a mixture can be separated by physical means, the components of a pure substance can only be broken down through what means? A:
OPTIONS:
- mechanical
- radiation
- thermal
- chemical

Answer: chemical

input with options: Q: What is the wavelength of light expressed in? A:
OPTIONS:
- nanoseconds
- millimeters
- vatts
- nanometers (nm)
output:
nanometers (nm)