Challenge your students with these 24 practice problems for mass to moles and moles to mass conversions for elements (front) and compounds (back). This is perfect for teaching these skills, as extra practice for in class or for homework, or even as a quiz. Answer key included!

This product was featured in TpT’s “10 FREE Downloads Newsletter” and has amassed over 1,600 downloads and nine 4-star reviews on TpT in merely a few months. See it on TpT Calculating weight and mass: 19 practice problems total. Alternate version included that has 3 example problems (one for each variable) and 16 practice problems. All original problems. Perfect homework, practice, or guided class activity for teaching these skills. This was a paid product until February 2018, but I decided to offer up a nicer freebie to help give buyers a better idea of what my best products are like. It has a $2 value, but if you will consider following me I’m glad to provide it to you for free. I hope you find it useful! Please review!!!

Challenge your students with these 18 practice problems with the wave speed formula! This is the perfect homework assignment, extra practice problems, or could be used as a teacher-led activity for when teaching these skills. The questions have students solve for all 3 variables in the wave speed equation. HS-PS4-1 I have included an alternate version that has the first 3 problems solved as examples. This alternate version is NOT included in the page count on this listing. These are high-impact practice exercises! Please review and follow my store!

Here are 3 original examples and 6 practice problems (alternate version included does not have examples, simply 9 problems) solving Newton’s 2nd Law problems using F=ma for force, mass, and acceleration. It includes a description of the 2nd law using the concepts of direct and inverse proportionality that makes perfect sense to a developing high school mind. Designed for 9th grade but usable in 7th-12th depending on student ability level and needs. Perfect homework assignment or in-class activity to practice or even teach these skills for the first time. HS-PS2-1 See it on TpT

Energía Cinética ELL Support for Kinetic Energy Practice Problems NGSS Correlation: HS-PS3-2 This was translated for real, NOT using Google translate. Available in English here This is a great worksheet I made with 3 examples and 18 original practice problems where students will solve the kinetic energy formula for kinetic energy, mass, and velocity. I have also included an alternate version that repusposes the examples as additional problems. This would make the perfect handout for teaching the skills or as a homework assignment! They key is elaborated, so it doesn’t just have the answers. It has all of the work shown.

6 original distance and displacement practice problems to challenge your students while mastering these concepts. Students practice understanding of scalar and vector quantities for distance and displacement. 2 of the problems require the use of Pythagorean’s Theorem to solve. See it on TpT

Spanish ELL Support for Density Practice Problems. I speak fluent Spanish, so this was translated for real, NOT using Google translate. 14 problemas de practica usando la formula para densidad para todos los variables. Disponible en ingles/Available in English

Challenge your students with these 14 original density problems where they solve for all variables in the density formula and more!

These 3 products are sold separately through TpT as $1 products, so I put them together on TES for your convenience as a $3 micro-bundle. See them on TpT individually: Combining Forces in One Dimension Balanced vs. Unbalanced Forces Converting Between Time Units

Never let your students confuse action-reaction and balanced forces again! This problem set will get the job done. Challenge your students to sketch and identify the action-reaction force pairs in each of the 24 scenarios included in this practice problem set. In includes an answer key with the table responses all filled out. This is the perfect problem set to use as homework or in-class practice, and it does an excellent job of presenting the students with lots of different situations to consider. Eventually, the students see the pattern in how the action and reaction force are related due to the repetitive nature of considering "What performs it?" and "On what is it performed?" for both forces.

A nice worksheet for homework or simply class practice that covers classification of matter and conservation of mass. It includes matching as well as engaging classification questions that require higher order thinking skills. See it on TpT

Here is a nice worksheet I made for my 9th grade Physical Science classes that reviews the group and period number trends of the periodic table. If you have taught your students OR need to teach them that the group # = the number of valence electrons in those elements’ atoms, and that the period # = the total number of energy levels of the atoms, then this is the worksheet for you! I have left a space for you to do an example with them before turning them loose on their own. Includes a key! See it on TpT

This worksheet was designed to help my students get comfortable interpreting the numbers of valence electrons and energy levels for atoms using the group and period trends. It starts out with identifying numbers of energy levels and valence electrons, then requires students to rank elements using those numbers. Then it has students use the trends to identify both characteristics for the same elements. This is a quick activity to do together as a class or also works as a great homework assignment once the material is taught in class. See it on TpT

Chemical Bonds Lab: Growing Ionic Crystals! Solutions, Solubility, Saturation This is a lab designed for 7-9th grades where students pick either halite, epsomite, or alum to grow crystals with. The student handout is comprehensive and thorough. Every year I do this lab the kids have a blast. It is designed for the teacher to do the heating for super saturation. I personally use a large griddle of my own to heat several beakers at a time. I recently acquired access to several hot plates and ran this lab by allowing students to do their own heating. It works either way! See it on TpT

Invisi-Tables! Indirect Evidence Analog for Gold Foil Experiment (Nucleus) Fun! See it on TpT This is a really fun lab I made for my 9th grade Physical Science classes, but it can easily be adapted for pretty much any age level where the teacher wants to introduce indirect evidence. The students are tasked with using nothing but the rolls of a marble to discover what is hidden under the Invisi-Table. Where are the objects? How many are there? They actually sketch a picture of what is under it without having to look! It is a perfect low budget way of simulating Rutherford’s gold foil experiment, where here the marble represents the alpha particles that were shot at the gold atoms and the objects under the table represent an unknown structure like the nucleus was to Rutherford during his research. I’ve used it 3 years in a row with great success each time. It is very simple yet engaging and will keep the kids thinking. It is also re-usable every year. The tables themselves don’t take up much room. Includes comprehensive student lab handout and a brief section for the teacher on how to build Invisi-Tables, which includes pictures of all 6 of the ones I have used for 3 years in a row! Materials for each student/group: a standard glass marble, ruler, and lab notebooks or paper. Materials for making Invisi-Tables: Glue gun, approximately 12" x 24" thin boards, 4 rubber stoppers per table for the legs, and some small random objects to glue under the tables themselves. This is definitely worth doing. Please share you experiences with it in the reviews or comments. This file will likely be updated for free in the future. Any updates will be documented here. Thanks very much for your business.

Lab Activity: Ziplock Pressure Chamber & Pouring CO2 Gas to Extinguish Candle! See it on TpT This is a really fun lab activity I designed for my 9th grade physical science class, but it can be easily adapted for other grade levels. There is an open flame in the form of one or more candles depending on how you run the room. In the first activity, the students follow procedure and measure baking soda and vinegar, then strategically mix them in a baggie without allowing them to mix until all air is removed and the baggie is sealed. Sit back and watch their eyes when they allow them to mix and they learn what pressure is hands on! In the second activity, they practice measuring the same substances, but this time they create the CO2 gas in a beaker, then pour it down a paper trough to extinguish a candle! It’s a fun challenge, but they absolutely lose their minds when they succeed! The lab includes thought provoking questions about pressure and the density of CO2.

Labs: Investigating Chemical Reaction Rates (includes 2 labs) See it on TpT This PDF contains 2 different approaches to a chemical reaction rates lab for 9th grade physical science. HS-PS1-5