Question

For Future FLVS Students - Physical Science Assessment 6.03

Answer 1

Question 1 (Worth 2 points)

Which of these statements is true about endothermic reactions, but not about exothermic reactions?

The reactants and products are different substances.

(Right Answer)>>The reactants have less energy than the products.

The temperature of the container increases.

No change in energy occurs.

Points earned on this question: 2

Answer 2

Question 2 (Worth 2 points)

A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scientist combines the reactants in the same container, but she also adds a catalyst. If everything else is the same about the two trials, what is most likely true about Trial B?

It will produce more product than Trial A.

It will produce different products than Trial A.

(Right Answer)>>It will have a lower activation energy than Trial A.

It will have a higher overall energy output than Trial A.

Points earned on this question: 2

Answer 3

In which of these situations is convection most likely the main form of heat transfer?

(Right Answer)>>Warm air from a heater on the first floor of a house moves to the upper floors.

The sides of a metal pan become hot when the pan is placed on a stove burner.

A person gets a sunburn from lying on the beach too long.

An ice cube melts when a person holds it in his hand.

Points earned on this question: 2