CAST Application

Hannah noticed an insect being able to walk on water without sinking. This is an example of which of the following?

• Cohesion

• Adhesion

• Surface tension

• Density

Which of the following is an example of cohesion?

• The formation of raindrops

• Capillary action in plants

• A small leaf floating on water

• A water strider “walking” on water

Maya pours water into a graduated cylinder and notices a curved line (meniscus) when reading the volume. Which of the following is responsible for the formation of a meniscus?

• Cohesion

• Adhesion

• Surface tension

• Gravity

Aria is conducting an experiment in her science class. She needs to know how many atoms make up one molecule of water (H₂O). Which of the following is correct?

• 1 atom of hydrogen and 1 atom of oxygen

• 1 atom of hydrogen and 0 atoms of oxygen

• 3 atoms of hydrogen and oxygen

• 2 atoms of hydrogen and 1 atom of oxygen

Tags

NGSS.MS-PS1-1

True or False: Water has many important properties and is essential to all life on Earth.

• True

• False

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS1-6

NGSS.MS-LS2-3

When Ethan spilled water on the table, he noticed that the water droplets stuck to the table surface. This attraction of water molecules to the table is known as _______.

• adhesion

• cohesion

• diffusion

• osmosis

Nora noticed that when she placed a paperclip gently on the surface of a glass of water, it didn't sink. The property of the surface of the water that allows it to resist external forces is known as _______.

• surface tension

• viscosity

• adhesion

• capillarity

Mason noticed that when he poured water into a glass, the water molecules seemed to stick together, almost like glue. This attraction between molecules of the same substance is known as _______.

• Cohesion

• Adhesion

• Diffusion

• Osmosis

During a science class, Ava learned that water has many unique _______ that make it a very special, life-sustaining compound.

• properties

• colors

• flavors

• textures

Mason noticed that after a rain shower, water droplets stick to the window of his house. Choose either cohesion, adhesion, or surface tension and identify which one is observed in this scenario.

• Cohesion

• Adhesion

• Surface Tension