1. Chapter 2 Science Starters
Grade 7 MCMS

2. Science Starter for Friday, September 18, 2015
Until we are ready for Labtv, please recheck your answers to your homework (pgs ). If you have time, answer the questions on 46 &47.

3. Honors Science Starter for Friday, September 18, 2015
Until we are ready for Labtv, please work on your Science World summary.
Summary DUE MONDAY.

4. Science Starters for Monday, September 21 , 2015
Modern scientists use a system of measurement called the International System of Units, abbreviated as _____.
The measure of the force of gravity acting on an object is called ____.
The _____ system is a system of measurement based on the number 10 and developed by scientists in the 1790s.

5. Science Starters for Tuesday, September 22, 2015
1. The base metric unit that measures
mass is the ___________________.
2. The base metric unit that measures
length is the __________________.
3. The base metric unit that measures
volume is the ___________________.

6. Science Starters for Wednesday, September 23, 2015
The amount of space an object takes up is its ______________.
_______________ is the measure of how much mass is contained in a given volume.
When you measure liquid volume, you measure at the bottom of the _______, the curve along the top of the liquid’s surface.

7. Science Starters for Thursday, September 24, 2015
True or False.
Weight is a measure of how much mass is contained in a given volume.
On the Kelvin scale, water freezes at 0°C and boils at 100°C.
An object will float if it is less dense than the surrounding liquid.
The balance is the tool used to measure mass.

8. Science Starters for Monday, September 28, 2015
Finish Little Millie Metric, if it is not completed
Labtv

9. Science Starters for Tuesday, September 29, 2015
Scientists often rely on a(n) __________ when they cannot obtain an exact number.
When you ________ measurements, the answer should only have the same number of significant figures as the measurement with the fewest significant figures.
A reliable measure is both _________ and precise.
Calculating percent error and checking the reasonableness of data are two of the math tools scientists use to analyze _____.
estimate
multiply
accurate
data

10. Binder Set Up Behind TAB 2: Measurement Lab Science Starters
Notes, lesson 1
(including kangaroo & king printout)
Notes, lesson 2
English Metric Foldable
Vocab Foldable 1
Measurement Lab
Little Millie Metric
Metric Clown
Measurement Quiz

11. NUMBER 14

12. Honors Binder Set Up Behind TAB 2: Little Millie Metric
Science Starters
Notes, lesson 1
(including kangaroo & king printout)
Notes, lesson 2
English Metric Foldable
Vocab Foldable 1
Little Millie Metric
Metric Clown

13. Science Starters for Wednesday, September 30, 2015
____________data are data that do not fit with the rest of the data set.
The significant figures in a measurement include all digits measured exactly, plus one __________ digit.
An _________ is an approximation of a number based on reasonable assumptions.
The ___________ is the number that appears most often in a list of numbers.
Anomalous
estimated
estimate
mode

14. Science Starters for Thursday, October 1
True or False.
Scientists control changes in the responding variable.
To help you see what the data from an experiment mean, you could use a(n) graph.
In science, line graphs are powerful tools because they allow you to identify bias, make predictions, and recognize anomalous data.

15. Science Starters Thursday, October 8, 2015
Correction: How do you label density?
______________ determines how close your measurement is to true value. You can calculate this by using the formula for ____ _______.
_____________ determines how close your measured values are to each other. You can calculate this by calculating the ____ of data.

16. Science Starters for Friday, October 9
Write “Last Day of the Quarter” and “Test” on your science starter.
Make sure your binder is in order (order on board).
Put binder in correct place in back of room (look at post it note).
Study, until test is handed out.

17. \

19. meter
liter
meter, feet, inches,
gram
kilo-
centi-
milli-
cup, ounce, liter,
kilometer
centimeter
millimeter
kiloliter
gram, pound,
centiliter
millimeter
kilogram
centigram
milligram

20. How accurate was your estimated measurement?
Why did all the groups get similar answers but not exact ones?
Why is a standard measurement system necessary?

21. Metric System
The metric system is a measurement system based on the number 10.
The international system of units or SI is the standard system of measurement allows scientists to compare and communicate with each other about their results.

22. Metric System

24. Metric Stairs

25. Page 38 Data may be misinterpreted.
I would use meters to measure my height and grams to measure my mass.

26. Page 39 kilometer hectometer decimeter centimeter
It is 100 times larger.
millimeter

27. Length Length is the distance from one point to another.
In SI, the basic unit for measuring length is the meter (m).
An instrument used to measure length is the meter ruler.

28. Length
penny – 19mm
dime – 18 mm
penny – 1.9cm
dime – 1.8 cm

29. Mass Mass is the measure of the amount of matter in an object.
In SI, the basic unit for measuring mass is the kilogram (kg).
A triple beam balance is an instrument used to measure mass.

30. Mass Both mass and weight measure a characteristic of an object.
Mass measures the amount of matter in an object. Weight measures the force of gravity on an object.
153.7g or 153,700 mg

31. Weight
Weight is the measure of the force of gravity acting on an object.
A scale is an instrument used to measure weight.
When you stand on a scale on Earth, gravity pulls you downward, compressing the springs in the scale. The more you weigh the more the springs compress.

32. Volume Volume is the amount of space an object or substance takes up.
In SI, the basic unit for measuring is the cubic meter (m3).

33. 45mL
~3,000 cm3

34. Pg. 43
40mL
45mL
5 mL (5cm3)

35. Density
Density is the measure of how much mass is contained in a given volume
 In SI, the basic unit for measuring density is kilograms per cubic meter (kg/m3).
Sink or Float? An object will float if it is less dense that the liquid around it. It will sink if it is more dense.

36. Do the Math!
68g/6cm3 = 11.3g/cm3
It would have a lower density because it has a greater volume and the same mass.

37. Density

38. Temperature
The temperature is a measurement of how hot or cold something is.
On the Celsius scale, water freezes at 0º and boils at 100º.
In addition to the Celsius scale, scientists sometimes use the Kelvin scale.
The thermometer is an instrument that measures temperature.

39. Temperature Boiling point of water 373K Freezing point of water 273K
No; there are 180 Fahrenheit units between freezing and boiling instead of 100.

40. Time Time is the measure of how long it takes to do something.
The second (s) is the ST used to measure time.
Instruments used to measure time are clocks and watches.

41. Time 2 4 3
00:15.26 1

42. English to Metric

43. Mathematics and Science
Math skills that scientist use to collect data include estimation, accuracy and precision, and significant figures.

44. Estimation
An estimate is an approximation of a number based on reasonable assumptions.
An estimate is not a guess – it is based on known information.

45. It has 64 birds.
Six, because the sample is one sixth of the
total area.
64 x 6 = 384 birds

46. Accuracy and Precision
Accuracy refers to how close a measurement is to the true or accepted value.
Precision refers to how close a group of measurements are to each other.

48. Significant Figures
The significant figures in a measurement include all digits measured exactly, plus one estimated digit.
If the measurement only have one digit, you must assume that it is estimated.

49. Adding or Subtracting Measurements
If you remove a tile that is 5.3 centimeters long from a row of tiles that is centimeters long, what is the new length of the row? How many significant figures are in this measurement?

50. Multiplying Measurements
Find the area of space that measures 4.4 meters by 2 meters. How many significant figures are in this measurement?

51. What Math Tools Do Scientists Use?
Scientists use certain math tools to analyze data. These tools include calculating percent error; finding the mean, median, mode, and range; and checking the reasonableness of data.

52. Percent Error
Percent error calculations are a way to determine how accurate an experimental value is.
A low percent error means that the result you obtained was accurate.
A high percent error means that your result was not accurate.

53. 11.2g/cm g/cm3 ÷
10.5 g/cm3 = x 100% = 6.7%
The balance wasn’t zeroed. Water is spilled when finding volume.

54. Mean, Median
The mean is the numerical average of a set of data. – Add up the numbers in the data set, then divide the sum by the total number of items you added.
The median is the middle number in a set of data. – List all the numbers in order from least to greatest. The median is the middle entry. If the list has an even number of entries, add the two middle numbers together and divide the two.

55. Mode & Range
The mode is the number that appears most often in a list of numbers.
The range of a set of data is the difference between the greatest value and the least value in the set.

56. 742 ÷ 7 = 106
94, 102, 107, 109, 110, 110, 110
The median is 109.
The mode is 110.

57. Reasonable & Anomalous Data
Is the data reasonable? Does it make sense?
Data that do not fit with the rest of the data set are anomalous data.
**What is an unknown variable that could have had an effect on the data?

58. Why do Scientists Use Models?