STEP 2: Thread the straw onto the other end of the string before tying off that end on the 2nd anchor point. STEP 1: Locate two anchor points across the room from each other like two chairs. String (yarn or twine, which one works better?).Drinking Straws (paper or plastic, which one works better?).You can always change a hypothesis upon testing your theory! SUPPLIES: What do they think will happen when the blown-up balloon is released?Īfter performing the experiment, kids can draw conclusions as to what happened and how it matched their initial hypotheses. You can also get kids started by writing down their hypotheses before diving into the experiment. To recreate accurate trials, you need to change the independent variable and measure the dependent variable. If you want to set up an experiment that includes several trials with the same balloon, make sure to use a soft tape measure to measure the circumference of the first balloon. Does the balloon travel further as it has more air in it? Learn more about the scientific method for kids! Turn it into a balloon rocket experiment by exploring what happens when the balloon is blown up to different sizes. All three laws of motion can be observed with a balloon rocket! CLICK HERE TO GET YOUR FREE BALLOON ROCKET PROJECT! His second law states that force times mass equals acceleration. An object in motion will stay in motion in a straight line until an unbalanced force acts upon it (think of a toy car going down a ramp). Newton’s first law states that an object at rest stays at rest until an outside force acts upon it. When the gas is forced out of the balloon, it is pushed back against the air outside the balloon, propelling it forward on the string! More complex designs can include gravity operated. Adding a nose cone can greatly reduce resistance and provide an area to add a little weight to help stabilize the rocket in flight. The most basic bottle rocket will consist of a body made from a soda or pop bottle and fins. For every action, there is an equal and opposite reaction. Water Bottle Rockets can have various designs of varying complexity. Then, you can bring in Sir Isaac Newton and his third law. When you release the balloon the air or gas escapes creating a forward motion called thrust! Thrust is a pushing force created by the energy released from the balloon.Īlso learn how the force of lift works with this paper helicopter activity! NEWTON’S THIRD LAW First, you blow up the balloon, filling it with gas. Find out what makes the balloon move along the string and see how far or fast you can get your own balloon rocket to travel.Īlso try these fun balloon rocket variations… Take up the challenge to make a balloon rocket with our step-by-step instructions below. MUST TRY: Have you ever made a bottle rocket for the outdoors? This easy balloon rocket STEM activity can teach kids how the force of air moving in one direction can propel a balloon in the opposite direction, much like a real rocket! You can easily add in Newton’s Third Law as part of the science lesson! Some of the best STEM activities are also the cheapest! Keep it fun and playful, and not make it too difficult that it takes forever to complete. STEM for kids doesn’t need to be complicated or expensive. This simple balloon rocket activity lets your kids think about forces in motion.
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