Metric Unit Review - Council Rock School District



Metric Unit Review Name _______________________________________

7th Grade Environmental Science

Mrs. Krempa Date & Section _______________________________

Try and not use your notes to complete this review – your test on this material is Monday & Tuesday!!

1. Complete the following chart…

10 100 1000

mm (ml, mg) cm (cl, cg) m (l,g) km (kl, kg)

2. How many ml in a liter? ________1000_____________

3. How many cg in a kg? _________100,000____________

4. When converting a small unit (mm) to a larger unit (km) you divide or move the decimal to the Left.

5. When converting a large unit (kl) to a smaller unit (ml) you multiply or move the decimal to the right.

6. Solve the following problems. Show your work! Conversions worth 3 points, Density worth 4 points.

a. 75 mm m 75. = 0.075 m

b. 98 kg cg 9,800,000 cg

c. 342 cl ml 3,420 mL

d. Antifreeze (Ethylene Glycol) has a volume of 264 cm3 and a mass of 275 g. What is the density of

the antifreeze? Will it sink or float in water?

M 275g

D = ----- = ---------- = 1.04 g/ cm3 antifreeze will sink in water

V 264 cm3

e. Styrofoam has a mass of 20 g and a volume of 42 ml. What is the density of the Styrofoam? Will

it sink or float in water?

M 20g

D = ----- = ---------- = .48 g/ml Styrofoam will float in water

V 42ml

7. What is the standard unit for metric length? _________Meter_______________

8. What is the standard unit for metric mass? _________Kilogram________________

9. What is the standard unit for metric liquid volume? _______Liter_________________

10. What is the standard unit for metric solid volume? ((list all 3 ways to write the same answer!)

____ cubic centimeter, cm3 or cc _____

11. What is the name of the metric (standard) temperature scale? _________Celsius____________

12. What is the other name for #10? _________Centigrade_________________

13. What is the name of the scientific temperature scale? _________Kelvin_____________

14. What is the mass per unit volume of an object? _________Density______________

15. What are you actually measuring when you use a Triple Beam Balance? _______mass______________

16. What is dependent on how many atoms & molecules are in an object. _______mass______________

17. What is dependent on gravity? ________weight_______________

18. What is the term for a scientific instrument having numbers on the side of it? ____graduated______

19. Complete the following chart:

Freezing Boiling Body Temp.

Fahrenheit ___32____ ___212____ ___98.6___

Celsuis ____0____ ___100____ ___37____

Kelvin ___273___ ___373___ ___310___

20. List all of the metric units for mass in order from smallest to largest. Spell the words out completely!

______milligram__________

______centigram__________

______decigram___________

________gram____________

______decagram___________

______hectogram__________

______kilogram__________

21. To find the density of an object you would do what mathematically? (say it in words, don’t just write the

formula!) _______divide mass by volume____________________________

22. A useful tool that may help a scientist interpret data by revealing unexpected patterns is a ___Graph___

23. What does a line graph show?

|a. |changes in the responding variable only. |

|b. |changes in the manipulated variable only. |

|c. |how the responding variable changes in response to the manipulated variable. |

|d. |how the manipulated variable changes on its own. |

24. The horizontal axis on a graph is called the _______x axis___________________________

25. The vertical axis on a graph is called the _________y axis_____________________________________

26. When drawing a graph, a “line of best fit” (drawn through as many of the points as possible, but not all )

shows what? Circle your answer below.

A. The overall trend of the line B. the individual data points

C. the slope of the line D. data points that fall on the line

27. True or false… If a graph shows no identifiable trend, then there is no real relationship between the

variables. Circle your answer above.

28. If a scientist can not get exact numbers, they can make (rely on) a(n) what?

_____estimate (estimation)___________________________________________________________

29. How close a group of measurements are to each other. _________precision_________________

30. The closeness of a measurement to its true value is its ______accuracy_______________________

12. If you measure your lab table 3 times and get 222 cm, 221 cm and 221.5 cm, what can you

say about your measurements if the actual length of the lab table is 227 cm? Circle your answer below.

A. they are accurate but not precise B. they are precise but not accurate

C. they are both accurate and precise C. they are neither accurate or precise

32. Circle the answers that are BEST PRACTICE for Lab safety.

A. Run screaming from the lab after an accident B. always wear safety goggles

C. Design your own experiments without help D. Always wear a lab apron

E. Always go into the field (experiment) alone F. Notify your teacher of any accidents

G. Don’t worry, nothing will go wrong! H. Always be prepared and use common sense

I. Start first aid on your own J. Follow teacher & lab instructions exactly.

** Do you also know: The “why’s” when it comes to the main terms? (weight, mass…)

All 15 pieces of equipment? With spelling?

How to use a triple beam, graduated cylinder, beaker & ruler?

Little Millie Metric

When making measurements, it is important to use the correct unit. Read the following story and fill in the blanks with the right unit. Choose the unit from the following list.

Each unit will be used only once. Be careful – it should make sense!

milliliter liter gram

kilogram millimeter centigram

meter kilometer degrees Celsius

It was a beautiful day. The temperature was a mild 27 _ degrees Celsius _. Little Mille Metric was packing a lunch basket to take to Grandma’s house. She carefully poured

500 ____ milliliters ____ of homemade lemonade into a bottle, which she put in the basket. Then she placed 0.5 _ kilograms ____ of cheese, 220 ___ grams ____ of roast beef and several large chocolate chip cookies in the basket. Millie put on her red leather jacket, strapped the basket on the back of her Harley and took a quick check of the gas tank. There were several ___ liters _____ of gasoline left.

After traveling a little more than 5 __ kilometers __, Millie realized she had lost her way.

At the next corner she spotted a very hair character leaning against a lamppost. He looked to be only 1.5 ____ meters _____ tall. He had a wolfish grin and dark, piercing eyes.

He introduced himself as Mr. W and offered to help Millie.

Mr. W’s directions turned out to be the long way to Grandma’s house, so Millie arrived an hour late. She let herself in and found Grandma in bed. Grandma did not look well. Had she always been that hairy? And those ears! “My goodness,” Millie gasped, “what big ears you have Grandma – at least 15 __ centimeters ___!” To which Grandma replied, “The better to hear you, my dear.” The Millie spotted the teeth. “My, Grandma, what big teeth you have – longer than 25 ___ millimeters __!” This last observation made Grandma very angry. She jumped out of bed and snarled, “the better to eat you!” Now Millie realized that this was not Grandma, but the hairy Mr. W!

Unfortunately for Mr. W, Millie held a black belt in Karate. She took care of him in just a few seconds! Millie found Grandma in the closet. When they finally sat down to eat lunch, Mille couldn’t help thinking that maybe next time she’d just have lunch delivered.

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