Q: Valence electrons also determine how wellif at allthe atoms of an element conduct what? Read this paragraph and choose the correct option from the provided answers: Valence electrons also determine how wellif at allthe atoms of an element conduct electricity. The copper wires in the cable in the Figure below are coated with plastic. Copper is an excellent conductor of electricity, so it is used for wires that carry electric current. Plastic contains mainly carbon, which cannot conduct electricity, so it is used as insulation on the wires. Choices: - water - pollution - light - electricity A:
electricity

Q: Production of abnormal white blood cells occurs in what cancer, which is the most common form in children? Read this paragraph and choose the correct option from the provided answers: Cancer can also be found in children. But childhood cancer is rare. Leukemia is the main type of cancer in children. It makes up about one third of all childhood cancers. It happens when the body makes abnormal white blood cells. Choices: - Brain - Breast - Bone - leukemia A:
leukemia

Q: What is the organ in which gas exchanges take place between blood and air? Read this paragraph and choose the correct option from the provided answers: Respiration begins with ventilation. This is the process of moving air in and out of the lungs. The lungs are the organs in which gas exchange takes place between blood and air. Choices: - heart - skin - kidney - lungs A:
lungs