Q: Answer the following question given this paragraph: Surface currents are like streams flowing through the surface of the ocean. They are caused mainly by winds. Earth's rotation influences their direction. This is called the Coriolis effect. Surface currents may affect the climate of nearby coasts. Q: What are surface currents mainly caused by? Choices: - lightning - waves - rains - winds A:
A: winds

Q: Answer the following question given this paragraph: All matter consists of atoms, which cannot be further subdivided into smaller particles. Q: What does all matter consist of? Choices: - carbon - helium - oxygen - atoms A:
A: atoms

Q: Answer the following question given this paragraph: A large log placed in a fire will burn relatively slowly. If the same mass of wood were added to the fire in the form of small twigs, they would burn much more quickly. This is because the twigs provide a greater surface area than the log does. An increase in the surface area of a reactant increases the rate of a reaction. Surface area is larger when a given amount of a solid is present as smaller particles. A powdered reactant has a greater surface area than the same reactant as a solid chunk. In order to increase the surface area of a substance, it may be ground into smaller particles or dissolved into a liquid. In solution, the dissolved particles are separated from each other and will react more quickly with other reactants. Q: Why does a large log burn relatively slowly compared to the same mass of wood in the form of small twigs? Choices: - smaller blade area - larger surface area - larger surface area - smaller surface area A:
A: smaller surface area

Q: Answer the following question given this paragraph: Today, these ideas about electrons are represented by the electron cloud model. The electron cloud is an area around the nucleus where electrons are likely to be. Figure below shows an electron cloud model for a helium atom. Q: What is the area around the nucleus of an atom where electrons are likely to be, called? Choices: - electron wave - electron membrane - electron pocket - electron cloud A:
A: electron cloud