What are some fun and safe science experiments teachers can apply in class?

experiment like force of friction between two rubbing bodies,spark produce as a result of +ve -ve charges of a small battery,etc

are fun and safe experiment

When there are a large number of students in a small classroom, there is a much higher risk of an accident occurring as experiments are carried out in close quarters. In crowded classrooms, high school and middle school students are more likely to bump into one another while working with chemicals, causing spills that are potentially harmful. Additionally, the student-to-teacher ratio in an overcrowded classroom may make it difficult for a teacher to adequately monitor students' work and answer questions that arise.

Offer Demonstrations Before Experiments

Whether kids are working with harmful chemicals or simply peering at slides under microscopes, they may need more than a sheet of printed instructions and some verbal explanation. Many children are visual learners and require a demonstration of the experiment in order to fully understand what they need to do and how to stay safe. It's always a good idea to show kids what they'll be doing before turning them loose to try it on their own.

Ensure Classrooms Have Necessary Safety Equipment

Because science classrooms are more hazardous than other areas of the school, it's essential to have the necessary safety equipment nearby. This should include plenty of sinks for flushing skin, a shower for washing the entire body in an accident, an eye wash stand for flushing the eyes, fume hoods to remove dangerous vapors, a fire blanket and fire extinguishers for smothering flames, and other personal safety equipment like goggles and gloves.

Make Lab Safety a Priority

The lab is the most dangerous part of any science classroom, so it's essential that you educate students about staying safe in this area of the class. Read up on School Lab Safety Tips to help.

Know What to Do During an Emergency

No matter how well prepared you are, accidents do happen. Knowing how to handle them can dramatically reduce the chance of severe injuries. Have a plan in place for how school personnel should handle a science classroom accident, and educate students about their role in helping out.

As long as students are safe, science class can be one of the most exciting and educational parts of the school day. Posting classroom rules and following safety guidelines will help avoid accidents and ensure a positive and safe learning experience.

The experiments applied while teaching vary from one subject to the other, but in general they should be learner centred/motivated so as to make the learners feel part of the learning. May be give a specific area/subject so as to give examples.

I do not teach Science so the only scientific thing I can try on my students is some test :-)

It depends on which area of science you are looking at. I am a teacher of Biological science. Conducting food tests on complex foods such as carbohydrates, proteins and fats/oil can be fun and safe at the same time.

Let me know if you have any area of science in mind. Thanks.