#### Math - 2018-19

# K.9 - Comparisons

**The
student will **

**compare**two objects or events,**using direct comparisons**, according to one or more of the following attributes: length (longer, shorter), height (taller, shorter), weight (heavier, lighter), temperature (hotter, colder), volume (more, less), and time (longer, shorter).

*Adopted: 2017*

### BIG IDEAS

- So that I can understand that comparisons exist in many different ways using many different things (length, height, weight, temperature, volume, and time.

### UNDERSTANDING THE STANDARD

- Students
need to identify the attribute that they are measuring (e.g., length, height,
weight, temperature, volume) before they begin to measure.
- Multiple
hands-on experiences are needed to gain the ability to compare the attributes
of objects.
- Students
develop conservation of measurement when they understand that the attributes do
not change when the object is manipulated (e.g., a piece of string that is
coiled maintains its length as it is straightened; the volume of water does not
change when poured from a pitcher into a fish tank.)
- Length is
the distance between two points.
- Height is
the distance from the bottom or base of something to the top.
- Weight is a
measure of the heaviness of an object.
- Temperature
is the degree of hotness or coldness of an object or environment.
- Volume is the measure of the capacity of a container.
- Time is the measure of an event from its beginning to end. Students could compare the difference between the time spent sliding down the slide versus the time spent walking around the school building

### ESSENTIALS

**The student will use problem solving, mathematical communication,
mathematical reasoning, connections, and representations to**

- Compare and
describe lengths of two objects as longer or shorter, using direct comparison
(e.g., the bus is longer than the car).
- Compare and
describe heights of two objects (as taller or shorter), using direct
comparison.
- Compare and
describe weights of two objects (as heavier or lighter), using direct
comparison.
- Compare and
describe temperatures of two objects or environment (as hotter or colder),
using direct comparison.
- Compare and
describe volumes of two containers (as more or less), using direct comparison.
- Compare and describe the
amount of time spent on two events (as longer or shorter), using direct
comparison.

### KEY VOCABULARY

*Updated: Aug 22, 2018*