Problem: 
Q: Answer the following question given this paragraph:   An element is a pure substance that cannot be separated into any other substances. There are 92 naturally occurring elements.   Q: What is a pure substance that cannot be separated into any other substances called?   A:
Answer: element
Problem: 
Q: Answer the following question given this paragraph:   Cnidarians have an incomplete digestive system with a single opening. The opening is surrounded by tentacles, which are covered with nematocyst cells and used to capture prey. Digestion takes place in the digestive cavity. Nutrients are absorbed and gases are exchanged through the cells lining this cavity. Fluid in the cavity supports and stiffens the cnidarian body.   Q: What organism is characterized by an incomplete digestive system and a single, tentacled opening?   A:
Answer: cnidarians
Problem: 
Q: Answer the following question given this paragraph:   When skater 2 runs into skater 1, he’s going faster than skater 1 so he has more momentum. Momentum is a property of a moving object that makes it hard to stop. It’s a product of the object’s mass and velocity. At the moment of the collision, skater 2 transfers some of his momentum to skater 1, who shoots forward when skater 2 runs into him. Whenever an action and reaction such as this occur, momentum is transferred from one object to the other. However, the combined momentum of the objects remains the same. In other words, momentum is conserved. This is the law of conservation of momentum .   Q: What property of an object is obtained by multiplying its mass and its velocity?   A:
Answer:
momentum