Q4 Test

What happens to the movement of atoms and molecules when you heat something up?

• Their movement slows down, and the temperature decreases.

• Their movement stays the same, but the temperature increases.

• Their movement becomes more organized, and the temperature remains constant.

• Their movement speeds up, and the temperature increases.

Tags

NGSS.HS-PS3-2

Which of the following statements is true about specific heat?

• Specific heat is the same for all materials.

• Specific heat is a measure of how much a substance resists changes in temperature.

• Specific heat decreases as the temperature of a substance increases.

• Specific heat is not important when calculating heat transfer.

If you have two objects of the same mass, but one is metal and the other is water, and you add the same amount of heat to both, what can you infer about their temperature change?

• The metal will have a smaller temperature change because it heats up more slowly.

• The water will have a larger temperature change because it has a lower specific heat.

• The metal will have a larger temperature change because it has a lower specific heat.

• Both will have the same temperature change because they received the same amount of heat.

What happens to the temperature of the surroundings during an endothermic reaction?

• The temperature stays the same because energy is not involved.

• The temperature increases because energy is released into the surroundings.

• The temperature decreases because energy is absorbed from the surroundings.

• The temperature fluctuates randomly.

Tags

NGSS.HS-PS1-4

How can you tell if a chemical reaction is exothermic by looking at a chemical equation?

• The equation will show '+ energy/heat' on the reactant side.

• The equation will not show any energy changes.

• The equation will show '+ energy/heat' on the product side.

• The equation will have equal amounts of reactants and products.

Tags

NGSS.HS-PS1-4

What does the pH scale measure?

• The amount of salt in a solution.

• The concentration of hydrogen ions in a solution.

• The temperature of a liquid.

• The amount of sugar in a solution.

pH of 7 is neutral. What does this mean about the amounts of hydrogen ions (H+) and hydroxide ions (OH-) in the solution?

• There are more hydroxide ions than hydrogen ions.

• There are more hydrogen ions than hydroxide ions.

• The solution is very acidic.

• There are equal amounts of H+ and OH- ions.

If a solution has a pH of 3, what can you infer about its hydrogen ion concentration compared to a neutral solution?

• It has a lower hydrogen ion concentration.

• It has the same hydrogen ion concentration.

• It has a higher hydrogen ion concentration.

• It has no hydrogen ions.

Which of the following solutions would be considered basic?

• A solution with a pH of 6.

• A solution with a pH of 7.

• A solution with a pH of 8.

• A solution with equal amounts of H+ and OH- ions.

In the formula M1V1 = M2V2, what does 'V2' represent?

• The starting volume of the solution before dilution.

• The final volume of the solution after dilution.

• The molarity of the starting solution.

• The amount of solvent added during dilution.