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Science Rocks!

Lemon Juice Rockets


your results

Sent in by:
Cherrell of SC

Three, two, one, blast-off! (Fannee Doolee says, "When you're done here, check out the Kitchen Chemistry online game for more scientific kitchen kOOkineSS!")

Materials Needed

  • An empty, 16 ounce, plastic soda or water bottle
  • A cork that tightly fits the soda bottle. If you can't find a cork that fits, you might want to wrap it in tape.
  • paper towels
  • toilet paper
  • lemon juice
  • baking soda
  • water
  • other acids, like cola, or vinegar
  • scissors
  • funnel
  • safety glasses



  1. Check with a grown-up before you begin.
  2. You will want to do this outside.
  3. First, tear the paper towels into strips and attach them to the cork with tape. This makes the cork look more like a rocket.
  4. Then, cut a small square out of toilet paper, put about a teaspoon of baking soda in the middle of the square, and fold in the sides to make a little packet.

  1. Put the funnel into the opening of the bottle.
  2. Pour a half inch of lemon juice into the bottle, and then add water until it is a little less than half-way full.
  3. Put on your safety glasses. Drop the baking soda packet into the soda bottle, close the bottle with the cork, shake the bottle, and stand back for lift off.

  1. Here's the reason the cork shoots up. Cherrell says that as the water and lemon juice soak through the toilet paper, the baking soda reacts to produce carbon dioxide. Carbon dioxide is a gas. As more gas forms, pressure builds up inside the bottle and sends the cork flying.

Lemon juice is an acid, and baking soda is a base. When they are mixed together they produce carbon dioxide. Try launching your rocket by mixing other acids with the baking soda. Make a prediction, and then test it out. Be sure to send us your discoveries so that we can share them with the world!

Some of your Results

Jr, age 9 of Oklahoma City, OK wrote:
it went 100ft tall.

Eman, age 10 of North Lauderdale, FL wrote:
It shot up in to ackshon like 50feet:)

Aisha, age 11 of Poplar Bluff, MO wrote:
my bottle went about 50 feet up in the air and it was very cool thanks, ZOOM!!

Rachel, age 14 of Kent, WA wrote:
The bottle went all the way over to my neighbors yard!!! It almost hit a car!!

Shamar, age 10 of Hartford, CT wrote:
It worked it relly worked!!! I was excited. It started to make bubbles come. I relized the more baking soda the more bubbles.

Olga, age 10 of Brooklyn, NY wrote:
I thought it was so cool. It went 10-20 feet. it was really awesome

Euvenia, age 13 of Palm Coast, FL wrote:
at first I used lemon it went high then I tried vinagar it went evan more higher it waz cool!!!

Onishia, age 13 of Osceola, AR wrote:
it shot up about 3 feet in the air I had to drop out of the science fair

Shelby, age 11 of Channahon, IL wrote:
I tried sevaral times and nothing happened not on inch. It was a big let down. I did everything right I know I did. does anyone know how to make it work?

Maaham of Islamabad, Pakistan wrote:
it went like 50 feet high and boy was it awesome.

Karina, age 10 of Pasadena, CA wrote:
when I had tried it, it was about 40 feet high it was so awesome I am going to try it again so bye!!!

Noemi, age 12 of Long Beach, CA wrote:
When I did it it flew about 30 feet in the air because I put a lot more soda. It was awsome.

Karrah, age 10 of Pensacola, FL wrote:
it exploded and shot up.

Jenny of Los Angeles, CA wrote:
it just fizzled because we forgot water

Jacob, age 9 of Hamilton, ON wrote:
It worked!!! It exploded 22 feet in the air!!! It was exciting to watch.

Jenefar, age 11 of New York City, NY wrote:
I used this activity to do my science project. I think that the baking soda was yhe main thing about doing this project because the baking soda mixes with the lemon juice which makes it explode.

Steven, age 10 of Princeton, NJ wrote:
20 or 30 feet!!! I did everything the directions said!!! but nothing!!! I will try again some other day!! It was cool trying it though!!!

Leanne, age 9 of Lancaster wrote:
As we set it up in the air it went high until it came down into the neighbors backyard.

Angelo, age 12 of Miami, FL wrote:
It flew 15 ft

Jaylyn, age 13 of Houston, GA wrote:
vinegar went the highest! make sure you use a cork that fits inside and not on the bottle or it wot work!

Briana, age 14 of Warner, SD wrote:
it flewed very highest in the eir

Dashawn, age 12 of Sandston, VA wrote:
It 20 feet in the air. It was cool.

Alexis, age 7 of Orlando, FL wrote:
I used vinegar and it worked. When I used lemon it did not work.

Christina, age 11 of Memphis, TN wrote:
l had tried to fix the Lemon Juice Rockets and tried to tell my dad Willam but he did`t and but l could`t get it to work but then l heard some nosie and it came on but it went off

Chris, age 10 of Miami, FL wrote:
i tried it 8 times and it didnt work!!!

Sunny, age 13 of Chandler, AZ wrote:
It went up to 17 ft. Then all that lemon juice and vinegar got on me.

Izamar, age 11 of Houston, TX wrote:
well first I followed all the instructions and whooo it when high

Rhea, age 9 of Ewa Beach wrote:
It flew up so high maybe up to 14 feet high.

Eva, age 9 of Bark, NE wrote:
It did not fly t all!!!

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