1. HOUR Picture: Definition:
MATH
Grades 3-5
Unit 4
HOUR
Definition:
An hour is a unit of time — it's sixty minutes, 3,600 seconds, or the length it takes the long hand on your watch to move in a full circle.
Picture:
Example:
We just got back an hour ago.

2. HALF-HOUR Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A half of an hour – it’s thirty minutes, or the length it takes the long hand on your watch to move half a circle.
Picture:
Example:
We haven’t been out of the house for a half-hour.

3. QUARTER HOUR Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A quarter of an hour – it’s fifteen minutes, or the length it takes the long hand on your watch to move a quarter of a circle.
Picture:
Example:
Within a quarter hour the tech will be here to get you.

4. MINUTE Picture: Definition:
MATH
Grades 3-5
Unit 4
MINUTE
Definition:
A unit of time equal to 60 seconds or 1/60th of an hour.
Picture:
Example:
He listened for a minute and then he became angry.

5. SECONDS Picture: Definition: 1/60 of a minute. Example:
MATH
Grades 3-5
Unit 4
SECONDS
Definition:
1/60 of a minute.
Picture:
Example:
For a second, she thought he was going to smile.

6. ELAPSED TIME Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
The time that elapses while some event is occurring.
Picture:
Problem:
Haley watched a fireworks show. The first firework went off at 8:15. She watched until the show ended 20 minutes later. What time was it when the fireworks show ended?

7. AREA Picture: Definition:
MATH
Grades 3-5
Unit 4
AREA
Definition:
The area of a flat, or plane  figure is the number of unit squares that can be contained within it.
Picture:
Problem:
Find the area of a square with each side measuring 5 inches.

8. ATTRIBUTE Picture: Definition:
MATH
Grades 3-5
Unit 4
ATTRIBUTE
Definition:
A property of an object or person etc.  Something you can say it has (such as size or color).
Picture:
Example:
The attributes of a dog include height, speed and color.

9. HEPTAGON Picture: Definition:
MATH
Grades 3-5
Unit 4
HEPTAGON
Definition:
A 7-sided polygon (a flat shape with straight sides).
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Example:

10. HEXAGON Picture: Definition:
MATH
Grades 3-5
Unit 4
HEXAGON
Definition:
A 6-sided polygon (a flat shape with straight sides).
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Example:

11. OCTAGON Picture: Definition:
MATH
Grades 3-5
Unit 4
OCTAGON
Definition:
An 8-sided polygon (a flat shape with straight sides).
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Example:

12. PARALLEL Picture: Definition:
MATH
Grades 3-5
Unit 4
PARALLEL
Definition:
Always the same distance apart and never touching.
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Example:

13. PARALLELOGRAM Picture: Definition: Example: MATH Grades 3-5 Unit 4
A 4-sided flat shape with straight sides where opposite sides are parallel. Also: • opposite sides are equal in length, and • opposite angles are equal (angles "a" are the same, and angles "b" are the same)
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Example:

14. PENTAGON Picture: Definition:
MATH
Grades 3-5
Unit 4
PENTAGON
Definition:
A 5-sided polygon (a flat shape with straight sides).
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Example:

15. POLYGON Picture: Definition: Example: MATH Grades 3-5 Unit 4
A plane shape (two-dimensional) with straight sides. Examples: triangles, rectangles and pentagons. (Note: a circle is not a polygon because it has a curved side)
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Example:

16. QUADRILATERAL Picture: Definition:
MATH
Grades 3-5
Unit 4
QUADRILATERAL
Definition:
A flat shape with four straight sides.
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Example:

17. RECTANGLE Picture: Definition: Example: MATH Grades 3-5 Unit 4
A 4-sided flat shape with straight sides where all interior angles are right angles (90°). Also opposite sides are parallel and of equal length. Example: A square is a special type of rectangle.
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Example:

18. RHOMBUS Picture: Definition: Example: MATH Grades 3-5 Unit 4
A 4-sided flat shape with straight sides where all sides have equal length.  Also opposite sides are parallel and opposite angles are equal. It is a type of parallelogram.
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Example:

19. RIGHT ANGLE Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
An angle which is equal to 90°, one quarter of a full revolution.
Picture:
Example:

20. ACUTE Picture: Definition: An angle less than 90° Example: MATH
Grades 3-5
Unit 4
ACUTE
Definition:
An angle less than 90°
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Example:

21. OBTUSE Picture: Definition:
MATH
Grades 3-5
Unit 4
OBTUSE
Definition:
An obtuse angle is one which is more than 90° but less than 180° In other words, it is between a right angle and a straight angle.
Picture:
Example:

22. RAY Picture: Definition:
MATH
Grades 3-5
Unit 4
RAY
Definition:
A line with a start point but no end point (it goes to infinity).
Picture:
Example:

23. STRAIGHT ANGLE Picture: Definition: Example: MATH Grades 3-5 Unit 4
A straight angle changes the direction to point the opposite way. It looks like a straight line. It measures 180° (half a revolution, or two right angles)
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Example:

24. LINE SEGMENT Picture: Definition: Example: MATH Grades 3-5 Unit 4
The part of a line that connects two points. It has definite end points. Adding the word "segment" is important, because a line normally extends in both directions without end.
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Example:

25. SQUARE Picture: Definition: Example: MATH Grades 3-5 Unit 4
A 4-sided flat shape with straight sides where: • all sides have equal length, and • every interior angle is a right angle (90°) It is a Quadrilateral and a Regular Polygon.
Picture:
Example:

26. TANGRAM Picture: Definition: Example: MATH Grades 3-5 Unit 4
A traditional Chinese puzzle made of a square divided into seven pieces (one parallelogram, one square and five triangles) that can be arranged to match particular design.
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Example:

27. TRAPEZOID Picture: Definition: Example: MATH Grades 3-5 Unit 4
A 4-sided flat shape with straight sides that has a pair of opposite sides parallel.
The sides that are parallel are called "bases". The other sides are "legs" (which may or may not be parallel).
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Example:

28. TRIANGLE Picture: Definition:
MATH
Grades 3-5
Unit 4
TRIANGLE
Definition:
A 3-sided polygon (a flat shape with straight sides).
Picture:
Example:

29. DIAGONAL Picture: Definition: Example: MATH Grades 3-5 Unit 4
A straight line inside a shape that goes from one corner to another (but not an edge). So when we join any two corners (called "vertices") of a polygon which are not already joined by an edge, we get a diagonal.
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30. PERIMETER Picture: Definition: Example: MATH Grades 3-5 Unit 4
The distance around a two-dimensional shape. Example: the perimeter of this rectangle is = 20 The perimeter of a circle is called the circumference.
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Example:

31. REGULAR POLYGON Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A polygon is regular when all angles are equal and all sides are equal (otherwise it is "irregular").
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Example:

32. TESSELLATE Picture: Definition:
MATH
Grades 3-5
Unit 4
TESSELLATE
Definition:
Cover (a plane surface) by repeated use of a single shape, without gaps or overlapping.
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Example:

33. TETROMINO Picture: Definition:
MATH
Grades 3-5
Unit 4
TETROMINO
Definition:
A tetromino is a geometric shape composed of four squares, connected orthogonally.
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Example:

34. BAR GRAPH Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A graph drawn using rectangular bars to show how large each value is.  The bars can be horizontal or vertical.
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Example:

35. DATA Picture: Definition: Example: MATH Grades 3-5 Unit 4
A collection of facts, such as numbers, words, measurements, observations or even just descriptions of things. Here we have a table of data from a survey of "What sport do you play?"
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Example:

36. FRACTION Picture: Definition: Example: MATH Grades 3-5 Unit 4
Part of a whole.  • the bottom number (the denominator) says how many parts the whole is divided into  • the top number (the numerator) says how many parts we have.
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37. LINE PLOT Picture: Definition: Example: MATH Grades 3-5 Unit 4
A line plot is a graph that shows frequency of data along a number line. It is best to use a line plot when comparing fewer than 25 numbers. It is a quick, simple way to organize data.
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Example:

38. PICTURE GRAPH Picture: Definition: Example: MATH Grades 3-5 Unit 4
A picture graph is a pictorial display of data with symbols, icons, and pictures to represent different quantities. The symbols, icons, and pictures of a picture graph typically represent concepts or ideas, or stand in for a larger quantity of something.
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Example:

39. SCALE Picture: Definition: Example: MATH Grades 3-5 Unit 4
The ratio of the length in a drawing (or model) to the length of the real thing Example: in the drawing anything with the size of "1" would have a size of "10" in the real world, so a measurement of 150mm on the drawing would be 1500mm on the real horse.
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Example:

40. SURVEY Picture: Definition:
MATH
Grades 3-5
Unit 4
SURVEY
Definition:
To gather information by individual samples so as to learn about the whole thing.
Picture:
Examples:
You could survey a river's water quality by taking a cupful of water from different random locations at different times. You can do a survey on people's opinions, by asking randomly chosen people the same questions.

41. KEY Picture: Definition:
MATH
Grades 3-5
Unit 4
KEY
Definition:
A list or note that explains the meaning of each symbol on a graph or explanation on a pictograph to show how many each picture stands for.
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Example:

42. SCALED GRAPHS Picture: Definition: Example: MATH Grades 3-5 Unit 4
Scale (on a graph) The scale is what you mark on the axes. It's the relation between the units you're using, and their representation on the graph i.e., the distance between marks.
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43. CUP ( C ) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
The cup is a unit of measurement for volume, used in cooking to measure liquids.
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Example:

44. CUSTOMARY UNIT Picture: Definition: Example: MATH Grades 3-5 Unit 4
A system of measurement where length is measured in inches, feet, yards, and miles; capacity in cups, pints, quarts, and gallons; weight in ounces, pounds, and tons; and temperature in degrees Fahrenheit.
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Example:

45. GALLON (gal) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A customary unit of volume for liquid measure. 1 gallon = 4 quarts.
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Example:

46. METRIC UNIT Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
The definition of analysis is the process of breaking down a something into its parts to learn what they do and how they relate to one another.
Picture:
Synonyms:
Examination
Investigation
Inspection
Survey
Study

47. OUNCE (oz) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
Imperial measure of weight. Abbreviated as oz. Equivalent to grams.
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Example:

48. POUND (lb) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A unit of mass (or weight) defined as kg.
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Example:

49. QUART (qt) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A unit of volume in Customary System. There are 4 quarts in 1 gallon.
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Example:

50. CAPACITY Picture: Definition: Example: MATH Grades 3-5 Unit 4
The amount that something can hold.  Usually it means volume, such as milliliters (ml) or liters (l) in Metric, or pints or gallons in Imperial. Example: "The bucket has a capacity of 9 liters.”
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Example:

51. CONVERT Picture: Definition:
MATH
Grades 3-5
Unit 4
CONVERT
Definition:
A change in the form of a measurement, different units, without a change in the size or amount.
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Example:

52. DISTANCE Picture: Definition:
MATH
Grades 3-5
Unit 4
DISTANCE
Definition:
Distance is the space between two objects or points.
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Example:

53. FOOT (ft) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A unit of length in the customary system.
1 foot = 12 inches, 1 foot = centimeters.
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Example:

54. GRAM (g) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A metric unit of mass (weight). 1,000 grams = 1 kilogram .
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Example:

55. INCH (in) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
The smallest unit of length in the customary system.
1 inch = 2.54 centimeters.
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Example:

56. KILOGRAM (kg) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A metric measure of mass abbreviated as kg.
1 kg = 1,000 grams.
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Example:

57. LITER (L) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A metric unit of volume mostly used to measure liquids. The abbreviation is L. 1
liter (L) = 1,000 milliliters (ml).
Picture:
Example:

58. MILLILITER (mL) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A metric unit used to measure capacity, which is equivalent to 1/1,000 of 1 liter.
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Example:

59. METER (m) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
The standard unit of length in the metric system.
1 meter = 100 centimeter.
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Example:

60. YARD (yd) Picture: Definition:
MATH
Grades 3-5
Unit 4
Definition:
A unit of linear measurement in the customary system equal to 3 feet (36 inches).
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Example: