Water droplet quiz

Why is ice one of the few items that float as a solid?

• Ice is affected by gravity differently than liquid water
• Water molecules in ice are more spread out, making it less dense than liquid water.
• Ice is made of different molecules than liquid water
• Ice is more dense than liquid water

What property of water allows it to form drops and create a 'meniscus' when in contact with a glass?

• High density

• Cohesion

• Surface tension

• Adhesion

Through which method does water vapor in the air turn into liquid water droplets on a cold surface, such as a glass in winter?

• Sublimation
• Evaporation
• Condensation
• Freezing

Tags

NGSS.MS-PS1-4

Why is water often referred to as the 'Universal Solvent'?

• It cannot dissolve any substances
• It is only found in certain parts of the world
• It is made up of various elements
• It has the ability to dissolve a wide range of substances.

What contributes to the impurities in rainwater, despite it being generally fresh and clean?

• Air pollution and contaminants in the atmosphere
• Alien invasion
• Excessive sunlight
• Chemicals in the soil

Why is the edge of the water on a glass surface not used when measuring the height of water in a rain gauge?

• The edge of the water is always dirty and contaminated
• The edge of the water is too difficult to measure accurately
• The edge of the water is too reflective and causes glare
• Surface tension and adhesion can cause inaccuracies

What property of water is responsible for allowing certain objects, like paper clips and bugs, to float on its surface?

• Surface tension
• Boiling point
• Viscosity
• Density

What is the pH of neutral water, and where does it fall on the pH scale?

• 7
• 3
• 5
• 10

Why do falling raindrops appear more like a small hamburger bun than a teardrop?

• Air resistance and the shape of the raindrop as it falls
• Because they are shaped by tiny hands
• Due to the gravitational pull of the Earth
• Because they are made of bread

Why does water boil at a lower temperature at higher altitudes?

• Lower atmospheric pressure
• Higher atmospheric pressure
• Increased density of water at higher altitudes
• Decreased kinetic energy of water molecules

Answer explanation

Since there is less pressure pushing on a pot of water at a higher altitude, it is easier for the water molecules to break their bonds and attraction to each other and, thus, water boils at a lower temperature.

Tags

NGSS.MS-PS3-5