Answer the following question given this paragraph: The development of modern lasers has opened many doors to both research and applications. A laser beam was used to measure the distance from the Earth to the moon. Lasers are important components of CD players. As the image above illustrates, lasers can provide precise focusing of beams to selectively destroy cancer cells in patients. The ability of a laser to focus precisely is due to high-quality crystals that help give rise to the laser beam. A variety of techniques are used to manufacture pure crystals for use in lasers. Q: What was used to measure the distance between the earth and the moon? Choices: - telescope - yardstick - ultrasound - laser beam A:
laser beam
(Question)
Answer the following question given this paragraph: Many solutes dissolve in water because water is a very polar compound. Q: Water's very polar compound causes most solutes to do what? Choices: - gel - combine - repel - dissolve A:
(Answer)
dissolve
Ques: Answer the following question given this paragraph: Scientific notation is a way of writing very large or very small numbers that uses exponents. Numbers are written in the format a 10 b . Q: When does a baby double in length and triple in weight? Choices: - terrible twos - fetal stage - pre-adolescence - infancy A:
Ans: infancy
(Q).
Answer the following question given this paragraph: Q: What functions as a framework that reinforces the shape of the leaf? Choices: - the normal structure - the central structure - the stylised structure - the vascular structure A:
(A).
the vascular structure
Ques:Answer the following question given this paragraph: Biological sources of air pollution include molds, pollen, and pet dander. Q: Molds, pollen, and pet dander are examples of air pollution with what type of source? Choices: - ecological - physical - chemical - biological A:

Ans:biological
Answer the following question given this paragraph: Algae play significant roles as producers in aquatic ecosystems. Microscopic forms live suspended in the water column. They are the main component of phytoplankton . As such, they contribute to the food base of most marine ecosystems. Q: What is the main component of phytoplankton? Choices: - sponge - coral - seawater - algae A:
algae