School Improvement in Maryland

Using the State Curriculum: Science, Grade 5

Skills and Processes | Earth/Space | Life | Chemistry | Physics | Environmental
Clarifications: Each clarification provides an explanation of an indicator/objective to help teachers better understand the skills and/or concepts.

Standard 4.0 Chemistry

Topic C. States of Matter

Indicator 1. Provide evidence from investigations to identify the processes that can be used to change materials from one state of matter to another.

Objective c. Analyze data from observations to support the idea that when materials change from one state to another the amount of material stays the same.

Clarification

When materials change from one state to another, although the properties change, the mass stays the same. Also, when matter expands or contracts because of the gaining or losing of heat, the amount of matter does not change. The mass of a cup of water, before and after freezing, will remain the same. A plastic bottle that expands when held in warm water has the same amount of mass as the same bottle contracting when placed in a bowl of ice.

Classroom Example

Object Mass before Type of Change Mass After
Chocolate bar 9 grams melted 9 grams
Orange juice 2 grams frozen 2 grams
Popsicle 4 grams melted 4 grams
/instruction/clarification/science/grade5/xml/4C1c.xml
Resources for Objective 4.C.1.c:
CLARIFICATIONS | Lesson Seeds |