(Question)
Q: Clouds are formed from what? Read this paragraph and choose the correct option from the provided answers: Rising air currents carry water vapor into the atmosphere. As the water vapor rises in the atmosphere, it cools and condenses. Condensation is the process in which water vapor changes to tiny droplets of liquid water. The water droplets may form clouds. If the droplets get big enough, they fall as precipitation. Choices: - ice crystals - snow flakes - dust particles - water droplets A:
(Answer)
water droplets

(Question)
Q: What do scientists use to study the deep without going to the seafloor? Read this paragraph and choose the correct option from the provided answers: Sending humans to the seafloor is expensive and dangerous. Having to return humans safely to the surface limits what a mission can do. Remotely operated vehicles , or ROVs, allow scientists to study the deep without going to the seafloor. These small vehicles carry cameras and scientific instruments. ROVs were used to study inside the Titanic . This would have been far too dangerous for a manned sub to enter. Scientists control ROVs electronically with sophisticated operating systems. Choices: - drill rigs - telescopes - ultrasound machines - remotely operated vehicles A:
(Answer)
remotely operated vehicles

(Question)
Q: What is the plasma membrane formed by? Read this paragraph and choose the correct option from the provided answers: The plasma membrane is formed by a phospholipid bilayer. Choices: - a cytoplasm bilayer - cholesterol byproduct - single lipid layer - a phospholipid bilayer A:
(Answer)
a phospholipid bilayer