Q: Answer the following question given this paragraph: Cancer is caused by mutations, which can be caused by pathogens, chemicals, or radiation. Q: Cancer is caused by mutations, which can be caused by pathogens, chemicals, or what else? Choices: - evaporation - convection - diseases - radiation A:
A: radiation

Q: Answer the following question given this paragraph: Respiratory system disorders are directly related to air pollution. These disorders have severe effects on human health, some leading to death directly related to air pollution. Air pollution related respiratory disorders include asthma, bronchitis, and emphysema. Asthma is a respiratory disorder characterized by wheezing, coughing, and a feeling of constriction in the chest. Bronchitis is inflammation of the membrane lining of the bronchial tubes of the lungs. Emphysema is a deadly lung disease characterized by abnormal enlargement of air spaces in the lungs and destruction of the lung tissue. Additional lung and heart diseases are also related to air pollution, as are respiratory allergies. Q: What disease is described as a respiratory disorder characterized by wheezing, coughing, and a feeling of constriction in the chest? Choices: - indigestion - dementia - inflammation - asthma A:
A: asthma

Q: Answer the following question given this paragraph: A polyatomic ion is an ion composed of more than one atom. For example, the ammonium ion consists of one nitrogen atom and four hydrogen atoms. Together, they comprise a single ion with a 1+ charge and a formula of NH 4 + . The carbonate ion consists of one carbon atom and three oxygen atoms, and it carries an overall charge of 2. The formula of the carbonate ion is CO 3 2- . The atoms of a polyatomic ion are tightly bonded together, so the entire ion behaves as a single unit. Figure below shows several models, and Table below lists many of the most common polyatomic ions. Q: A polyatomic ion is an ion composed of more than one what? Choices: - pair bond - neutron - nucleus - atom A:
A: atom

Q: Answer the following question given this paragraph: The reaction is exothermic and thus the sign of the enthalpy change is negative. Q: What enthalpy change is observed in an exothermic reaction? Choices: - positive - no change - entropy - negative A:
A: negative