Answer the following question given this paragraph: A: Energy is released when an atom gains an electron. Halogens release the most energy when they form ions. As a result, they are very reactive elements. Q: What happens to energy when an atom gains an electron? Choices: - it is folded - it is used - it increases - it is released A:
it is released
Answer the following question given this paragraph: The electrical potential difference between the two plates is expressed as , the electric field strength times the distance between the plates. The units in this expression are Newtons/coulomb times meters, which gives the final units Joules/coulomb. Voltage is an expression of the amount of potential energy per unit charge. The work done moving a charge against the field can be calculated by multiplying the electric field potential by the charge, . Q: What is it called when a charge moves against a field? Choices: - momentum - power - force - work A:
work
Q: Answer the following question given this paragraph: Living chordates are mainly vertebrates. In vertebrates, the notochord develops into a backbone, or vertebral column, after the embryonic stage. A small percentage of chordates are invertebrates. Their notochord never develops into a backbone. Invertebrate chordates include tunicates and lancelets. Both groups of animals are small and relatively primitive. They are probably similar to the earliest chordates that evolved more than 500 million years ago. Q: During the embryonic stage of vertebrates, the notochord develops into what? Choices: - rib cage - umbilical cord - brain stem - backbone A:
A: backbone
Question: Answer the following question given this paragraph: But ice ages also occurred many times in the past. An ice age is a period when temperatures are cooler than normal. This causes glaciers to spread to lower latitudes. Scientists think that ice ages occurred at least six times over the last billion years alone. How do scientists learn about Earth's past climates?. Q: What is the term for a period when temperatures are cooler than normal causing glaciers to spread to lower latitudes? Choices: - cooling era - cold age - freezing point - ice age A:
Answer: ice age
*Question*
Answer the following question given this paragraph: Long bones are longer than they are wide and have a shaft and two ends. The diaphysis, or central shaft, contains bone marrow in a marrow cavity. The rounded ends, the epiphyses, are covered with articular cartilage and are filled with red bone marrow, which produces blood cells (Figure 38.17). Most of the limb bones are long bonesfor example, the femur, tibia, ulna, and radius. Exceptions to this include the patella and the bones of the wrist and ankle. Q: What is contained in the cavity of a long bone's central shaft? Choices: - blood - calcium - cells - marrow A:
**Answer**
marrow
Answer the following question given this paragraph: In addition to these organs, the male reproductive system consists of a series of ducts and glands. Ducts include the vas deferens and ejaculatory ducts. They transport sperm from the epididymes to the urethra in the penis. Glands include the seminal vesicles and prostate gland. They secrete substances that become part of semen. Q: The vas deferens and ejaculatory ducts transport sperm from the epididymes to the urethra in what system? Choices: - famous reproductive system - digestive system - cardiovascular system - male reproductive system A:
male reproductive system