CLSS7_U7_U8

What is the pH of a neutral solution?

• 7

• 10

• 5

What happens when metals react with acids?

• Release hydrogen gas

• Form metal salts

• Both A and B

What is the role of decomposers in a food web?

• Produce oxygen

• Break down dead organisms

• Photosynthesis

What is the product of a neutralization reaction between an acid and a base?

• Salt and water

• Carbon dioxide

• Hydrogen gas

What is the pH of a solution after a strong acid is neutralized by a strong base?

• 7

• Less than 7

• Greater than 7

What is the role of an indicator in a neutralization reaction?

• To speed up the reaction

• To determine the endpoint of the reaction

• To increase the pH

What is the role of enzymes in a chemical reaction?

• Speed up the reaction

• Produce light

• Change color of the reactants

What is the function of chlorophyll in photosynthesis?

• Produce oxygen

• Convert sunlight into energy

• Break down glucose

What is the pH of a solution after a weak acid is neutralized by a strong base?

• 7

• Less than 7

• Greater than 7

What is the product of a reaction between a metal and oxygen?

• Carbon dioxide

• Metal oxide

• Hydrogen gas