Q: What period starts after the baby is born, and the placenta is expelled from the body? Choices: - fetal - postfetal - traumatic - postpartum A:
postpartum

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: 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: Q: What change the physical properties of solvents? Choices: - molecules - cells - chemical reactions - solutes A:
Answer: solutes

*Question*
Q: What type of diseases in humans are caused by protozoa? Choices: - protozoa diseases - dysentery - diarrhea - protist diseases A:
**Answer**
protist diseases

*Question*
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