Q: What do cyclotrons use to cause particles to move in circular orbits? Choices: - layers field - occurs field - mixed field - magnetic field A:
magnetic field

Q: Clouds are formed from what? Choices: - ice crystals - snow flakes - dust particles - water droplets A:
water droplets

Q: Q: In an endothermic reaction, what is absorbed by the reaction? Choices: - food - fuel - atoms - energy A:
A: energy

Question: Q: What structure connects the fetus to the placenta, allowing the exchange of gases? Choices: - sediment cord - skin cord - belly button - umbilical cord A:
Answer: umbilical cord

*Question*
Q: What do you call compounds that have covalent bonds? Choices: - reflectivity compounds - valence compound - ions - covalent compounds A:
**Answer**
covalent compounds

*Question*
Q: What do stored fats provide our body with for later use? Choices: - metals - hydrogen - water - energy A:
**Answer**
energy