Ques: Answer the following question given this paragraph: Some materials have negative heats of solution; the dissolution of one of these solutes in water is an exothermic process. Heat is released, causing a net increase in the temperature of the solution. Conversely, other substances have positive heats of solution. For example, the dissolution of potassium nitrate in water is an endothermic process. The resulting absorption of energy causes the solution to become colder. Calculations involving heats of solutions follow the same basic approach that we have used with other enthalpy problems. Q: Some materials have negative heats of solution; the dissolution of one of these solutes in water is called? Choices: - endothermic process - acetylene process - ionized process - exothermic process A:
Ans: exothermic process

Ques: Answer the following question given this paragraph: You can greatly reduce your risk of developing type 2 diabetes by maintaining a healthy body weight. Some cases of type 2 diabetes can be cured with weight loss. However, most people with the disease need to take medicine to control their blood glucose. Regular exercise and balanced eating also help. Like people with type 1 diabetes, people with type 2 diabetes must frequently check their blood glucose. Q: What must people with type 1 and type 2 diabetes frequently check? Choices: - blood plasma levels - muscle glucose levels - blood density levels - blood glucose levels A:
Ans: blood glucose levels

Ques: Answer the following question given this paragraph: Flatworms do not have a respiratory system. Instead, they have pores that allow oxygen to enter through their body. Oxygen enters the pores by diffusion. Q: By what process does oxygen enter the pores of flatworms? Choices: - absorption - filtration - permeation - diffusion A:
Ans: diffusion

Ques: Answer the following question given this paragraph: Generators and motors are almost identical in construction but convert energy in opposite directions. Generators convert mechanical energy to electrical energy and motors convert electrical energy to mechanical. Q: Generators convert mechanical energy to which kind? Choices: - kinetic - radiation - static - electrical A:
Ans:
electrical