8th Grade-Significant Digits and Graphs

Study Guide

Billy was walking outside after a rain storm. As he was walking the sun started to shine. After a while he decided to walk back towards his house when he noticed that the puddles that were directly in the sun were quite a bit warmer than the puddles that had indirect sunlight. He thought that direct sunlight would heat the water faster than indirect sunlight.

Look at question 1 on your guide. What would be Billy’s problem statement? Does direct sunlight heat water faster than indirect sunlight?

Look at question 1 on your guide. What would be Billy’s hypothesis? If I test whether direct or indirect sunlight heats water faster, then I will find that it is direct sunlight.

Look at question 1 on your guide. Testable question that is written in question form is known as what? Problem

Look at the Career graph on your guide. What was the most popular career chosen by middle school students? Nurse

Look at the Career graph on your guide. What was the least popular career chosen by middle school students? Dentist


4.

Look at the Smith Family Circle Graph. What is the total percent of yearly budget spent on housing and transportation? 50%

Look at the Smith Family Circle Graph. How much money was spent in a year to feed this family?$6,000

Look at the Smith Family Circle Graph. What is the difference in dollars allowed for fun and clothing?$720

Look at the Smith Family Circle Graph. If this family spent ½ (one half) of their money allowed for transportation on the upkeep of an automobile, what % of the total budget would this be?10%

Look at the Smith Family Circle Graph. The percent allowed for housing is how much larger than the percent allowed for transportation? 10%

CAR RENTAL / WEEKDAY
RATE PER MILE / WEEKEND
RATE PER MILE / HOLIDAY
RATE PER MILE
SAMPLE RATES FOR
EACH MILE DRIVEN / FIRST / EACH / FIRST / EACH / FIRST / EACH
100 MILES / ADDITIONAL
MILE / 100 MILES / ADDITIONAL
MILE / 100
MILES / ADDITIONAL
MILE
Avis / .22 / .12 / .25 / .15 / .25 / .15
Budget / .20 / .10 / .22 / .12 / .25 / .16
Enterprise / .22 / .10 / .25 / .15 / .25 / .18
Hertz / .20 / .15 / .30 / .18 / .26 / .19
Discount Cars / .20 / .12 / .25 / .15 / .20 / .18
Econo-Car / .22 / .10 / .25 / .14 / .20 / .18
Limo – Unlimited / .50 / .25 / .55 / .30 / .75 / .35
Effective rates – do not include tax charges.
STANDARD DAILY RATE – all but LIMO-UNLIMITED
WEEKDAY $29.00 / **NOTE**
WEEKEND $30.00 / LIMO-UNLIMITED
BASE RATE IS $50.00 DAILY FOR ANY DAY
HOLIDAYS $35.00
EXCLUDES LIMO RENTAL
*NOTE: Add this base DAILY RATE to the mileage driven to derive cost of rental

Look at the Car Rental data table. What would it cost to rent a car

from AVIS on a Wednesday morning, returning it on Friday afternoon

and driving a total of 155 miles for a business trip?$115.60

Look at the Car Rental data table.What is the difference in cost of

renting a car from AVIS for one day on the weekend and driving 125

miles - and renting a car from BUDGET for one day on the weekend

and drivingthe same distance (125 miles)? $3.75

Look at the Car Rental data table.What is the price of a limo rental

from Limos-Unlimited for a Saturday night ride to and from the Senior

Prom – mileage one way is 20 miles? $72.00


Look at the Rainfall bar graph. What does the scale on the left beginning with 0 and ending with 3 represent? Inches of rain in a day

Look at the Rainfall bar graph. Which two days had approximately the same amount of rainfall? Monday and Tuesday

Look at the Rainfall bar graph. The amount of rain that fell on Saturday is twice the amount of rain that fell on which other day? Friday

What is the rule for adding and subtracting significant digits? Answers must be rounded with the least number of decimal places.

What is the rule of multiplying and dividing significant digits? Answers must be rounded with the least number of significant digits.

What is water displacement and how do we use it in the field of science? Typically used to find the volume of irregularly shaped objects- You put the object in the water and see how much it rises, then subtract the initial volume of water from the final volume (how much it rises).

Explain DRY.

Dependent Responding Y-axis

Explain MIX.

Manipulated Independent X-axis

How many significant digits are in the following number?.00230

3

How many significant digits are in the following number? 1.23

3

How many significant digits are in the following number? 2,407

4

How many significant digits are in the following number?1,370

3

Study the diagram of the one room cabin and answer the questions that follow.













































Look at the cabin diagram. The largest planter is located on what wall of the cabin?Southeast

Look at the cabin diagram. Each window takes approximately 10 minutes to shutter and prepare for a storm.How long will it take to prepare these cabin windows for a storm?1 hour, 40 minutes

Look at the cabin diagram. What fractional part of the windows is located on the east side of the cabin?1/5

What does interpolation mean in regards to collecting data and analyzing graphs? Predicting data points within the given data

What does extrapolation mean in regards to collecting data and analyzing graphs? Predicting data points beyond the data given to you.