Focus Questions

What is the difference between dissolving and melting? What is the conservation of matter? What is the difference between a physical change and a chemical change?

Dissolving vs. Melting

Dissolving is the process by which a solute (for example salt) is broken into smaller and smaller pieces until it is no longer visible in a solvent (for example water). Melting is the change in physical state from solid to liquid by means of heat.

What is the conservation of Matter?

The amount of matter stays the same, even when matter changes form (for example from solid to liquid or liquid to gas). Matter does not magically disappear, it simply changes form!

Physical vs. Chemical Change

During a physical change, the state of matter of a single substance changes from solid, to liquid, to gas. This change can be revered by heat adding or taking away. A chemical change is the change in one or more substances to have new properties different from the original ones.

Investigation Discovery Centers

During Science Investigations, we will work for 3 days rotating through Science Discovery Centers. In these centers, students will explore science vocabulary, dive deeper into the topic through scientific reading and answering questions, explore videos and other extension activities, as well as conduct a hands on Investigation with a lab partner. Check out below for all materials needed for centers.

Investigation

Predict, Experiment, Observe

Click on the slideshow below for Investigation 2.3. Here you will find all the information you need to understand the investigation, including important vocabulary and key ideas.

Vocabulary

Discover, Learn, Challenge

Click on the slideshow below to find your vocabulary words for this Investigation. Write your words in your science journal. Be sure to label them Vocabulary and underline and highlight your words. Then, choose an activity from below to work on!

Scientific Reading

Analyze, Extend, Question

Click above to open an interactive eBook

Textbook

Read pages 23-27 (21-25 if you are reading in the eBook) Solid to Liquid and Liquid and Gas Changes. (You can read a textbook in class, or click on the eBook to the left) Then, answer the questions on the worksheet in your science notebook. Be sure to check both sides!

Video

Learn about energy transfers and changes from solid, to liquid, to gas. Explore the conservation of matter and how matter is not lost in changes in form. When you are done watching the video, log into google classroom to complete a journal entry describing all that you learned. Be sure to go back to the video for answers to help you as needed.

Done early?

Check out any of the links below for additional reading materials on conservation of matter or properties of matter. You can also try the Done Early material posted under Mixtures and Solutions on Google Classroom.

Click here to read about Properties of Matter
Click here to read about Conservation of Matter

What do I need to complete?

Google Classroom

Welcome to Investigation 2. Check out the assignments below to make sure that all your work is complete. Most work for Science is paper and pencil and in your journal in class. A copy of the sheets you need to complete are included below.

Science Journal work for Investigation 2

Below you will find descriptions of the work from Investigation 2. All materials are in your science journal in school. Any work that is incomplete can be taken home to complete. Please be sure to return the science journal as soon as you are done, as we use it everyday in school. You can use the slideshows linked above for help completing any of the science work. If you missed an experiment, you can check the slideshows for descriptions of what took place or check with a classmate as well. On google classroom you will see a checklist of all work assigned and grades.

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Investigation 2.3

During the science experiment, we made predictions and then observed the process of melting. Complete the chart. Then, answer the question at the bottom, writing in complete sentences what you observed.

Investigation 2.3

(Page 1) Read textbook pages 23-27 and then answer the questions in complete sentences. Be sure to answer all parts of the question. You can access the textbook digitally by clicking on the link above and logging in through Clever.

Investigation 2.3

(Page 2) Read textbook pages 23-27 and then answer the questions in complete sentences. Be sure to answer all parts of the question. You can access the textbook digitally by clicking on the link above and logging in through Clever.

ns, being sure to use scientific words.

Investigation 2.3

After conducting the melting experiment, write a complete explanation for the difference between dissolving and melting. Be sure to check your definitions and be specific in your response.

Bonus Experiment

In our bonus experiment, we explored the difference between a chemical and a physical change. Using your definitions and science journal, write down the difference between a chemical and a physical change. Then, write your predictions and observations for what happens when you mix baking soda and vinegar.

Bonus Experiment

After conducting the experiment, describe what happened when you added the vinegar? Be sure to write an explanation using the words chemical change, carbon dioxide and react. What is the role of carbon dioxide in our atmosphere?

ns, being sure to use scientific words.

Video – Matter
(Optional)

Click on the link above to watch the video on changes in properties of matter. Please log in through Clever, and ask your teacher for help to access the video as it can be challenging. When done, please complete the worksheet. It might also be helpful to write down answers while you are watching!

Changes in Matter Packet (Optional)

In this extension activity, we explored states of matter, atoms and changes from liquid, to solid to gas and back. Students can complete a variety of activities including extension questions, KWL charts, crossword puzzles and others.

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