Which substancemight protect giraffes’mouths the best?

Spit Pick

Photos by Jon Whitney

Cornstarch

Baking soda

Salt

Three bowls

Marker

Masking tape

Water

Spoon

Measuring spoons

You’ll Need

Step 1. Measure 30 milliliters (2 tablespoons) of cornstarch.

Step 2. Pour the cornstarch into a bowl.

Step 3. Label the bowl “cornstarch.”

Step 4. Measure 30 milliliters (2 tablespoons) of baking soda.

Step 5. Pour the baking soda into a second bowl.

Step 6. Label the bowl “baking soda.”

Step 7. Measure 30 milliliters (2 tablespoons) of salt.

Step 8. Pour the salt into a third bowl.

Step 9. Label the bowl “salt.”

Step 10. Add 25 milliliters (1 tablespoon plus 2 teaspoons)of water to each bowl.

Step 11. Stir each mixture well. Note the differencesin thickness for each one.