Question

11
maria wanted to measure the amount of time it took for a ball to roll down a ramp.
she had never used a stopwatch before. kevin gave her the following directions, but
they were in the wrong order.
step 1: hold the stopwatch in one hand.
step 2: press the button once to start the clock.
step 3: press the button twice to clear any old times.
step 4: press the button to stop the clock.
step 5: let the watch run until it is time to stop it.
step 6: record the amount of time.
how should she arrange kevins steps so they are in the correct order?
1, 5, 2, 3, 4, 6
1, 2, 3, 5, 4, 6
1, 3, 2, 4, 5, 6
1, 3, 2, 5, 4, 6
12
multiple choice 2 points
a broad body of evidence, subject to revisions, supported by different kinds of
scientific investigations and often involving the contributions of scientists from
different disciplines is necessary to develop
an inference
a fact
a theory
a prediction
13
multiple choice 2 points
a scientist is planning to carry out an experiment on the effect of heat on the
function of a certain enzyme. which would not be an appropriate first step?
doing research in a library
having discussions with other scientists
completing a data table of expected results
using what is already known about the enzyme

Explanation:

1. First, hold the stopwatch (Step 1). Then clear old times (Step 3). Next, start the clock (Step 2). Let it run (Step 5). Stop it (Step 4). Record time (Step 6).
2. A theory is a well - supported explanation based on a broad body of evidence from scientific investigations.
3. Completing a data table of expected results is not an appropriate first step. First, research, discuss, and use prior knowledge.

Answer:

1. 1, 3, 2, 5, 4, 6
2. a theory
3. completing a data table of expected results