Science reason english 7 docx

heating efficiency and could affect the boiling times she was trying to measure. As long as all water

used in the experiment came from the same source, it shouldn’t matter whether it was distilled or not.

Stirring is not necessary since there is nothing to mix. There is nothing wrong with setting up a data

sheet before the experiment.

28. f. The statement that the volume change was greatest in the container with the largest radius, and

barely detectable in the container with the smallest radius should provide you with the right answer.

29. d. The scientist used the graduate cylinder to check whether and by how much the volume in the con￾tainer had changed.

30. j. Looking at the unfilled table provided in the text, a container with a 7.0 cm radius has a radius that

is smaller than that of container 5, but larger than that of container 4. That tells you that the order in

which the water in the 7.0 cm radius container boiled would be between container 5 and container 4.

In the text you were told that container 5 boiled first, so the container with a 7.0 cm radius would boil

after the water in container 5.

Passage V

31. b. In the impetus theory, impetus is a property of the object imparting the motion. In the theory of

inertia, the property of inertia is a property of the moving object itself.

32. j. The theory of inertia correctly predicts the parabolic path of a projectile. This is because the projec￾tile continues to move with constant velocity in the horizontal direction since there is no net force in

the horizontal direction. The net force in the vertical direction is the gravitational force of the earth on

the object. This causes the object to fall toward the earth as it travels horizontally creating the para￾bolic path. In the impetus theory, however, the impetus of the projectile would run out abruptly which

would then predict that the projectile should keep going in a straight line until it uses up the impetus

and then it would be predicted to fall straight down.

33. c. According to the inertia theory, the net force that acts to slow down the arrow is the force of gravity

on the arrow. The force of the bow on the arrow is what causes the arrow to begin moving. This means

that selection I is false, the force of the bow on the arrow is not the net force acting to slow down the

arrow, but selection III is true since the force of gravity is the net force acting to slow down the arrow

according to the inertia theory. Selection II indicates that the arrow receives an infinite amount of

impetus, but according to the explanation of the motion of the arrow using the impetus theory the

arrow only receives a certain amount of impetus from the bow and when it uses up this impetus it will

fall to the ground. This means selection II is false, but selection IV which says that the impetus

imparted to the arrow by the bow is used up and that is why the arrow falls to the ground is true.

34. f. For an object to continue moving forever in a straight line with constant velocity, the impetus the￾ory requires that the object be given an infinite amount of impetus.

35. d. The inertia theory states that an object will continue moving in a straight line with constant veloc￾ity as long as no net force acts on it.

36. g. As defined by the impetus theory, impetus is the property of motion that is imparted to the object

by whatever is acting on it. From the example in the reading, the impetus is a property motion of the

bow that is transferred to the arrow.

–ACT SCIENCE REASONING TEST PRACTICE–

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