Water Absorption and Measurement Concepts

Mrs. Bellatosh teaches third graders about water properties, focusing on gravity and surface tension. She conducts an experiment to measure how much water a sponge can absorb, using math to calculate the mass of the absorbed water. The lesson transitions to understanding volume, comparing different units of measurement like cups, pints, quarts, gallons, and liters. The video concludes with a reminder about Thanksgiving break and a preview of the next lesson on temperature.

What two forces affect the shape of a water drop?

• Surface tension and air pressure

• Gravity and wind

• Gravity and surface tension

• Air pressure and wind

Which material is NOT waterproof?

• Wax paper

• Aluminum foil

• Paper towel

• Plastic wrap

What is the first step in the sponge absorption experiment?

• Soak the sponge in water

• Let the sponge drip dry

• Measure the mass of the dry sponge

• Estimate the mass of the water

How do you calculate the mass of water absorbed by the sponge?

• Divide the mass of the soaked sponge by the mass of the dry sponge

• Subtract the mass of the dry sponge from the mass of the soaked sponge

• Multiply the mass of the dry sponge by the mass of the soaked sponge

• Add the mass of the dry sponge to the mass of the soaked sponge

What is the mass of water absorbed by the sponge in the experiment?

• 9 grams

• 52 grams

• 61 grams

• 54 grams

Which unit is NOT used to measure volume in the United States?

• Gallons

• Quarts

• Liters

• Cups

How many cups are in one quart?

• 2 cups

• 3 cups

• 5 cups

• 4 cups

What is the equivalent of 1 liter in milliliters?

• 1000 milliliters

• 750 milliliters

• 500 milliliters

• 100 milliliters

How many quarts are there in a gallon?

• 2 quarts

• 5 quarts

• 3 quarts

• 4 quarts

What tool is used to measure small quantities of liquid in science?

• Pipette

• Beaker

• Graduated cylinder

• Measuring cup