Hello parents, teachers and students! If your kiddos are learning about weathering, make sure to do this fun demonstration with them! It speeds up the weathering process by millions of years 😉

Be sure to check out GMSA@9 on Wednesdays when KSAT Meteorologist Sarah Spivey does the demonstrations and explains the science behind it. To view, click on the video player above. Check out our Science with Sarah webpage for more fun science experiments!

HERE’S WHAT YOU’LL NEED

FOR THE OOBLECK

• A large container
• 2 cups corn starch
• 1 cup water
• Food dye (optional)

DRY ICE “INSTRUMENT”

• Dry ice (NEVER HANDLE DRY ICE WITHOUT GLOVES!)
• Metal spoon

BILLIONS OF BUBBLES

• Cups/containers of different sizes/shapes
• Water
• Soap

DO THE ACTIVITIES

OOBLECK SLIME

• STEP 1: Measure out 1 cup of water and add the food dye to the water.
• STEP 2: In the large container, place 2 cups of cornstarch.
• STEP 3: Pour the colored water into the large container with the cornstarch and mix using your hands (NOTE: This will be messy! Make sure to have plenty of paper towels nearby and maybe use an apron to cover your clothes!)
• STEP 4: Try compressing the Oobleck in your hands into a ball. Observe how it quickly “melts” into a liquid.
• STEP 5: You can store your Oobleck in the fridge to use for later. When you’re ready to dispose of your Oobleck, throw it away in the trash. Large amounts of cornstarch should not go down the pipes.

DRY ICE “INSTRUMENT”

• STEP 1: Place a small piece of dry ice on the table in front of you.
• STEP 2: Using a spoon, press on the dry ice. It should make a silly sound.

BILLIONS OF BUBBLES

• STEP 1: Fill the containers with water and a little bit of soap.
• STEP 2: Drop some dry ice into the containers and watch as lots and lots of bubbles form.

HOW IT WORKS

OOBLECK

Because cornstarch is not totally soluble in water, it can make a non-Newtonian fluid when combined with water.

A non-Newtonian fluid does not follow Newton’s laws of viscosity. That may be a mouthful, but basically, Oobleck is a fluid that can exist both as a solid and a liquid depending on how much force you use!

DRY ICE

Dry ice is frozen carbon dioxide that turns directly into a gas from a solid. That’s called sublimation. It makes the funny noise on the spoon because of the gas bubbles trapped against the metal. You can see the gas in the bubbles that form in the soapy water!

APPLY FOR SCIENCE WITH SARAH

Want Sarah to come out to your school? Here’s how to apply: CLICK HERE.

Hello parents, teachers and students! If your kiddos are learning about weathering, make sure to do this fun demonstration with them! It speeds up the weathering process by millions of years 😉

Be sure to check out GMSA@9 on Wednesdays when KSAT Meteorologist Sarah Spivey does the demonstrations and explains the science behind it. To view, click on the video player above. Check out our Science with Sarah webpage for more fun science experiments!

HERE’S WHAT YOU’LL NEED

• A large jar with a lid you can screw on (I used a 44 oz jar)
• 2 pieces of jumbo chalk
• Rock salt

MAKE YOUR HYPOTHESIS

Answer this question: What will happen to the chalk if I shake it in a jar with rock salt?

DO THE EXPERIMENT

• STEP 1: Place one of the chalks in the large jar
• STEP 2: Fill the jar at least a third of the way full with rock salt, and close it
• STEP 3: Shake the jar for quite a while
• STEP 4: Take out the chalk and observe how much of it has broken down by comparing it to the other piece of chalk that hasn’t been placed in the jar
• STEP 5: Repeat as often as you’d like to try to break down the piece of chalk even more

HOW IT WORKS

This demonstrates how millions of years of weathering can break down mountains, boulders, and rocks.

APPLY FOR SCIENCE WITH SARAH

Want Sarah to come out to your school? Here’s how to apply: CLICK HERE.

Hello parents, teachers and students! Science with Sarah is back for the 2026-2027 school year, and we’re starting the year with this cool classic: Here’s how to make ice cream at home. A great way to explore changing states of matter!

Be sure to check out GMSA@9 on Wednesdays when KSAT Meteorologist Sarah Spivey does the demonstrations and explains the science behind it. To view, click on the video player above. Check out our Science with Sarah webpage for more fun science experiments!

HERE’S WHAT YOU’LL NEED

• 1 sandwich ziplock (no slide seal)
• 1 gallon ziplock (no slide seal)
• 1 cup half & half
• ½ teaspoon vanilla extract
• 1 tablespoon sugar
• ¼ cup salt
• Ice
• Spoon
• Cloth to protect hands

MAKE YOUR HYPOTHESIS

How long will it take the ice cream to form?

DO THE EXPERIMENT

• STEP 1: Pour the half & half, vanilla extract, and sugar in the smaller ziplock bag. Try to remove as much air from it as possible, and seal it tight

• STEP 2: Put enough ice in the large ziplock bag to fill it up about half way, and pour in the salt
• STEP 3: Place the sealed small ziplock inside the large ziplock, and then seal the large ziplock

• STEP 4: Using the cloth to protect your hands, shake the bag for several minutes (at least 3 minutes!)

• STEP 5: After a while, open the small ziplock and enjoy your tasty treat!

HOW IT WORKS

The salt lowers the melting temperature of the ice, allowing a very cold solution to surround the bag with the ice cream mixture. As you shake it, it causes the cream to freeze. This is a great example of how a liquid (cream) can turn into a solid as it freezes!

APPLY FOR SCIENCE WITH SARAH

Want Sarah to come out to your school? Here’s how to apply: CLICK HERE.

On Wednesday, July 15, all Bexar County residents can visit the zoo for $8. The zoo is open from 9 a.m. to 5 p.m.

Locals Day zoo tickets can be purchased online. One guest per party must provide an ID or utility bill with a Bexar County resident address.

For anyone who can’t visit the zoo on Wednesday, don’t worry. There are more Locals Days planned throughout the year.

Upcoming Locals Day events:

• Aug. 6
• Sept. 5
• Sept. 13
• Oct. 9
• Nov. 27
• Dec. 4

To learn more about the zoo or its exhibits, click here.

Read also:

• San Antonio Zoo welcomes 1-year-old female giraffe from Tulsa

On Tuesday, May 19, all Bexar County residents can visit the zoo for $8. The zoo will be open from 9 a.m. to 5 p.m.

According to a news release, this week’s Locals Day celebrates District 2.

Locals Day zoo tickets can be purchased online. One guest per party must provide an ID or utility bill with a Bexar County resident address.

For anyone who can’t visit the zoo on Tuesday, don’t worry. There are more Locals Days planned throughout the year.

Upcoming Locals Day events:

• June 14
• July 15
• Aug. 6
• Sept. 5
• Sept. 13
• Oct. 9
• Nov. 27
• Dec. 4

To learn more about the zoo or its exhibits, click here.

Read also:

• San Antonio Zoo welcomes 1-year-old female giraffe from Tulsa

Hello parents, teachers and students! Yep, I’m sure you’ve heard of this classic. Science with Sarah for the 2025-2026 school year ends with a bang. Here’s how you can do it with your kiddos.

Be sure to check out GMSA@9 on Wednesdays when KSAT Meteorologist Sarah Spivey does the demonstrations and explains the science behind it. To view, click on the video player above. Check out our Science with Sarah webpage for more fun science experiments!

HERE’S WHAT YOU’LL NEED

• A piece of paper
• Scotch tape
• Index card
• Roll of Mentos
• 2L Diet Coke bottle (the smaller ones don’t work as well)

DO THE EXPERIMENT

• Make a Mentos dispenser by rolling up a piece of paper and taping it into a tube shape
• Stack the Mentos into the paper tube. You’ll use the index card to keep the Mentos in the tube until it’s time to drop them into the Diet Coke.
• Unscrew the 2L Diet Coke bottle and place it on the ground
• Drop all of the Mentos into the Diet Coke bottle using the paper tube and index card, step back and watch the geyser launch into the sky

The Locals Day planned for Friday has been canceled, the zoo said. According to the release, the zoo plans to reopen on Saturday.

The next Locals Day ticket sale is scheduled for May 10.

Guests with questions about Friday’s closure and the cancellation of Locals Day are encouraged to contact the zoo’s call center for assistance.

ORIGINAL STORY: If you don’t have any plans on Friday, the San Antonio Zoo is offering discounted admission for Bexar County residents as part of Locals Day.

On May 1, all Bexar County residents can visit the zoo for $8. The zoo will be open from 9 a.m. to 5 p.m.

According to a news release, the upcoming Locals Day celebrates Bexar County Precinct 2.

“Locals Day gives residents the opportunity to explore the Zoo’s immersive habitats, encounter incredible wildlife from around the world, and create lasting memories with family and friends at one of San Antonio’s most beloved destinations,” the release stated.

Locals Day zoo tickets can be purchased online. One guest per party must provide an ID or utility bill with a Bexar County resident address.

For anyone who can’t visit the zoo on Friday, don’t worry. There are more Locals Days planned throughout the year.

Upcoming Locals Day events:

• May 10
• May 19
• June 14
• July 15
• Aug. 6
• Sept. 5
• Sept. 13
• Oct. 9
• Nov. 27
• Dec. 4

To learn more about the zoo or its exhibits, click here.

Read also:

• San Antonio Zoo welcomes 1-year-old female giraffe from Tulsa

On Friday, Saturday and Sunday, all Bexar County residents can visit the zoo for $8. The zoo will be open from 9 a.m. to 5 p.m. those days.

This year’s parade carries special meaning for the zoo, as President and CEO Tim Morrow will serve as grand marshal for the Battle of Flowers Parade on Friday.

Locals Day zoo tickets can be purchased online. One guest per party must provide an ID or utility bill with a Bexar County resident address.

For anyone who can’t visit the zoo on Friday, don’t worry. There are more Locals Days planned throughout the year.

Upcoming Locals Day events:

• May 1
• May 10
• May 19
• June 14
• July 15
• Aug. 6
• Sept. 5
• Sept. 13
• Oct. 9
• Nov. 27
• Dec. 4

To learn more about the zoo or its exhibits, click here.

Read also:

• San Antonio Zoo welcomes 1-year-old female giraffe from Tulsa

On April 10, all Bexar County residents can visit the zoo for $8. The zoo will be open from 9 a.m. to 5 p.m.

According to a news release, the upcoming Locals Day celebrates San Antonio’s District 9.

“Locals Day gives residents the opportunity to explore the Zoo’s immersive habitats, encounter incredible wildlife from around the world, and create lasting memories with family and friends at one of San Antonio’s most beloved destinations,” the release states.

Locals Day zoo tickets can be purchased online. One guest per party must provide an ID or utility bill with a Bexar County resident address.

For anyone who can’t visit the zoo on Friday, don’t worry. There are more Locals Days planned throughout the year.

Upcoming Locals Day events:

• May 1
• May 10
• May 19
• June 14
• July 15
• Aug. 6
• Sept. 5
• Sept. 13
• Oct. 9
• Nov. 27
• Dec. 4

To learn more about the zoo or its exhibits, click here.

Read also:

• San Antonio Zoo welcomes 1-year-old female giraffe from Tulsa

Be sure to check out GMSA@9 on Wednesdays when Meteorologist Sarah Spivey does the demonstrations and explains the science behind it.

HERE’S WHAT YOU’LL NEED

FOR THE OOBLECK

• A large container
• 2 cups corn starch
• 1 cup water
• Food dye (optional)

FOR THE SODA BALLOON

• Kosher salt
• A balloon
• Personal soda bottle (preferably diet/sugar-free to avoid a sticky mess!)
• Container (optional)

DO THE ACTIVITY: Oobleck

ABOUT OOBLECK: Because cornstarch is not totally soluble in water, it can make a non-Newtonian fluid when combined with water.

A non-Newtonian fluid does not follow Newton’s laws of viscosity. That may be a mouthful, but basically, Oobleck is a fluid that can exist both as a solid and a liquid depending on how much force you use!

• STEP 1: Measure out 1/2 cup of water and add the food dye to the water
• STEP 2: In the large container, place 1 cup of cornstarch
• STEP 3: Pour the colored water into the large container with the cornstarch and mix using your hands (NOTE: This will be messy! Make sure to have plenty of paper towels nearby and maybe use an apron to cover your clothes!)
• STEP 4: Try compressing the Oobleck in your hands into a ball. Observe how it quickly “melts” into a liquid.

• STEP 5: You can store your Oobleck in the fridge to use for later. When you’re ready to dispose of your Oobleck, throw it away in the trash. Large amounts of cornstarch should not go down the pipes.

DO THE ACTIVITY: Soda Balloon

Carbon dioxide gas is trapped inside of liquid...that’s soda! This activity shows just how much gas is in a soda bottle by trapping it in a balloon.

• STEP 1: Put some kosher salt in the balloon. We use kosher salt because the larger crystals make a bigger reaction!
• STEP 2: Carefully place the balloon on the opening of the soda bottle. DO NOT DUMP THE SALT IN THE BALLOON...yet. It should dangle off of the side of the soda bottle.
• STEP 3: Place the soda bottle with the attached salt balloon in a container to avoid a mess
• STEP 4: Carefully lift up the balloon to dump the salt into the soda bottle. You’ll notice the balloon quickly fill with bubbles!

SCIENCE WITH SARAH

If you’d like Sarah to come to your school and conduct a science experiment live on KSAT, fill out this form. “Winners” are selected at random.