Gases Have Weight

Try a safe version of one test at home, like dissolving salt and sand in water or fizzing baking soda and vinegar, before your child does the matching page. Ask what evidence each answer is based on. Check each page with the answer key.

Find the mass of the air in pumped balls and explain why gases have weight. Air is a gas, a kind of matter made of particles (bits too small to see). Gas particles have mass (an amount of matter), so air has weight even though you cannot see it. The directions on the page read: Read about the tests. Fill in rows 1 to 3. Then, answer 4 to 7. The answer key shows every answer.

Yes, both. We made it for 5th Grade matter, and the page works the same whether it lands on a kitchen table or a center rotation. At home, most families go through it together and talk the answers out loud, and that talking is where most of the learning happens with matter investigations. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

They test its properties, such as whether a magnet pulls it, whether it conducts electricity, dissolves or floats, and then match the results to the properties of known materials.

Balance two empty balloons, then fill one with air: that side tips down. Weighing a ball flat and again after pumping it up also shows the mass the air added.

Gas bubbles, a new color, a new smell, light or warmth given off, or a solid forming in a liquid. A physical change, like melting or dissolving sugar, changes shape, size or state but not the substance.

Yes. All five matter sheets have an answer key that shows every answer, including sample answers for the questions children explain in their own words.

5 printable worksheets, all free to preview. Downloads are included with a ClassWeekly free trial, and every page prints on standard 8.5 x 11 paper.

These are written for 5th Grade students, roughly ages 10-11. Many teachers also use them a grade up for review or a grade down as an extension, so use the preview to judge the fit for a particular child.

Yes. Each one shows the NGSS code it covers on its own page, so you can check the alignment yourself rather than taking our word for it.