Question

review key facts
describe the steps you would take to solve a numeric and a non-numeric problem.
numeric:
1.
2.
3.
problem (oval)
non-numeric:
1.
2.
extension show the steps needed to solve the following problem.
the school day begins at 8:00 a.m. and ends at 3:30 p.m. 30 minutes of the day are taken up by lunch. there are 7 class periods in the day. if each class period is 50 minutes long, what is the total time spent in getting from one class or lunch period to another?
review key vocabulary
read the description and find the vocabulary term that matches it.
description

1. ______ study of processes that take place in living organisms
2. ______ systematic approach to solving a scientific problem
3. ______ variable that you change during an experiment
4. ______ the study of matter and how it reacts
5. ______ deals with mechanism, rate, and energy transfer
6. ______ proposed explanation for an observation
7. ______ well-tested explanation for a broad set of observations.
8. ______ concise statement summarizing results of many experiments
9. ______ variable that is observed during an experiment

vocabulary term
a. theory
b. chemistry
c. scientific law
d. dependent or responding variable
e. scientific method
f. biochemistry
g. physical chemistry
h. independent or manipulated variable
i. hypothesis
(and copyright info at the bottom)

Explanation:

Review Key Facts (Numeric Problem - School Day Time Calculation)

Step1: Calculate total school day minutes

School starts at 8:00 AM and ends at 3:30 PM. From 8:00 AM to 3:00 PM is 7 hours, and then an additional 30 minutes, so total hours = 7.5 hours. Since 1 hour = 60 minutes, total minutes = \( 7.5 \times 60 = 450 \) minutes.

Step2: Calculate time spent in classes and lunch

• Lunch time: 30 minutes.
• Each class is 50 minutes, 7 classes: \( 7 \times 50 = 350 \) minutes.
• Total time in classes and lunch: \( 350 + 30 = 380 \) minutes.

Step3: Calculate transition time

Total school day minutes - time in classes and lunch = transition time. So \( 450 - 380 = 70 \) minutes. Also, the number of transitions: between 7 classes and 1 lunch, there are \( 7 + 1 - 1 = 7 \) transitions? Wait, no: for \( n \) periods (classes + lunch), transitions are \( n \) (from start to first, then between each, then last to end? Wait, the problem says "getting from one class or lunch period to another". So total periods: 7 classes + 1 lunch = 8 periods. Transitions between periods: 8 - 1 = 7? Wait, no, let's re - check. Wait, the first step: total school time: 8:00 AM to 3:30 PM is 7 hours 30 minutes = 450 minutes. Classes: 7 50 = 350, lunch: 30, so class + lunch time: 350 + 30 = 380. Then the remaining time is 450 - 380 = 70 minutes. Now, how many transitions? If there are 7 classes and 1 lunch, that's 8 periods. The number of transitions between periods is 8 - 1 = 7? Wait, no, the start of the day to first period is a transition? Wait, the problem says "getting from one class or lunch period to another". So between class 1 and class 2, class 2 and class 3, ..., class 7 and lunch, lunch and... Wait, no, 7 classes and 1 lunch: so the periods are: class1, class2, ..., class7, lunch? No, probably lunch is one period, and 7 classes. So total periods: 7 + 1 = 8. The number of transitions between these periods is 8 - 1 = 7? But 7 transitions x minutes = 70 minutes? Wait, no, maybe my initial calculation of total time is wrong. Wait 8:00 AM to 3:30 PM: from 8 to 3 is 7 hours, plus 30 minutes, so 760 + 30 = 450 minutes. Classes: 750 = 350, lunch: 30, so 350 + 30 = 380. 450 - 380 = 70. Now, the number of transitions: when you have \( n \) periods, the number of transitions between them is \( n \) (from start to first period, then between each period, then last period to end). Wait, no, the problem says "getting from one class or lunch period to another". So between class 1 and class 2, class 2 and class 3, ..., class 7 and lunch, and lunch to... Wait, no, 7 classes and 1 lunch: so the sequence is: start -> class1 -> class2 -> ... -> class7 -> lunch -> end? No, probably lunch is in the middle. But regardless, the total time for transitions is 70 minutes. Wait, maybe the number of transitions is 8 (7 classes + 1 lunch, so 8 periods, and transitions between them: 8 - 1 = 7? No, 7 classes and 1 lunch: total 8 periods, so transitions: 8 - 1 = 7? But 70 minutes total transition time. Wait, maybe I made a mistake in the number of transitions. Wait, let's think again. The school day starts at 8:00, then first class, then transition to second class, ..., after 7th class, transition to lunch, then transition to... Wait, no, after lunch, is there another class? No, the school day ends at 3:30. Wait, the problem says "7 class periods in the day" and "30 minutes of the day are taken up by lunch". So total periods: 7 classes + 1 lunch = 8 periods. The number of transitions between these periods is 8 - 1 = 7? But 7 transitions, and total transition time is 70 minutes. Wait, maybe the answer is 70 minutes? Wait, no, let's recalcu…

1. Biochemistry (\( f \)): Studies chemical processes in living organisms.
2. Scientific method (\( e \)): A systematic way to solve scientific problems.
3. Independent or manipulated variable (\( h \)): The variable changed in an experiment.
4. Chemistry (\( b \)): Studies matter and its reactions.
5. Physical chemistry (\( g \)): Deals with mechanism, rate, and energy transfer in chemical processes.
6. Hypothesis (\( i \)): A proposed explanation for an observation.
7. Theory (\( a \)): A well - tested explanation for many observations.
8. Scientific law (\( c \)): A concise statement summarizing experimental results.
9. Dependent or responding variable (\( d \)): The variable observed during an experiment.

Answer:

The total time spent in getting from one class or lunch period to another is 70 minutes.

Review Key Vocabulary