Answer the following question given this paragraph: Afterbirth The delivery of the placenta and associated membranes, commonly referred to as the afterbirth, marks the final stage of childbirth. After expulsion of the newborn, the myometrium continues to contract. This movement shears the placenta from the back of the uterine wall. It is then easily delivered through the vagina. Continued uterine contractions then reduce blood loss from the site of the placenta. Delivery of the placenta marks the beginning of the postpartum periodthe period of approximately 6 weeks immediately following childbirth during which the mother's body gradually returns to a nonpregnant state. If the placenta does not birth spontaneously within approximately 30 minutes, it is considered retained, and the obstetrician may attempt manual removal. If this is not successful, surgery may be required. It is important that the obstetrician examines the expelled placenta and fetal membranes to ensure that they are intact. If fragments of the placenta remain in the uterus, they can cause postpartum hemorrhage. Uterine contractions continue for several hours after birth to return the uterus to its pre-pregnancy size in a process called involution, which also allows the mother's abdominal organs to return to their pre-pregnancy locations. Breastfeeding facilitates this process. Although postpartum uterine contractions limit blood loss from the detachment of the placenta, the mother does experience a postpartum vaginal discharge called lochia. This is made up of uterine lining cells, erythrocytes, leukocytes, and other debris. Thick, dark, lochia rubra (red lochia) typically continues for 23 days, and is replaced by lochia serosa, a thinner, pinkish form that continues until about the tenth postpartum day. After this period, a scant, creamy, or watery discharge called lochia alba (white lochia) may continue for another 12 weeks. Q: What period starts after the baby is born, and the placenta is expelled from the body? Choices: - fetal - postfetal - traumatic - postpartum A:
postpartum
Answer the following question given this paragraph: The white light in fireworks displays is produced by burning magnesium in air, which contains oxygen. What compound is formed?. Q: What burns to produce the white light in fireworks displays? Choices: - nitrogen in air - helium in air - oxygen in air - magnesium in air A:
magnesium in air
Q: Answer the following question given this paragraph: times faster than air. For this reason, high-quality helium-filled balloons are usually made of Mylar, a dense, strong, opaque material with a high molecular mass that forms films that have many fewer pores than rubber. Mylar balloons can retain their helium for days. Q: What material used for helium-filled balloons is dense, strong and opaque, with a high molecular mass that forms films that have many fewer pores than rubber? Choices: - fiberglass - cellophane - foil - mylar A:
A: mylar
Question: Answer the following question given this paragraph: Solutes change the physical properties of solvents. They lower the freezing point and raise the boiling point of solvents. Q: What change the physical properties of solvents? Choices: - molecules - cells - chemical reactions - solutes A:
Answer: solutes
*Question*
Answer the following question given this paragraph: Scientists are searching for ways to create controlled nuclear fusion reactions in order to produce safe nuclear power. Fusion involves only harmless, plentiful elements but requires extremely high temperatures. Q: What type of diseases in humans are caused by protozoa? Choices: - protozoa diseases - dysentery - diarrhea - protist diseases A:
**Answer**
protist diseases
*Question*
Answer the following question given this paragraph: Stars are classified by color and temperature. The most common system uses the letters O (blue), B (blue-white), A (white), F (yellow-white), G (yellow), K (orange), and M (red), from hottest to coolest. Q: What celestial bodies are classified by color and temperature, ranging from blue to red and hottest to coolest? Choices: - astroids - planets - galaxies - stars A:
**Answer**
stars