# 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).

### 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