Properties of Water Review

What is the chemical formula for water?

• HO

• 2HO

• H₂O

• HO₂

Tags

NGSS.MS-PS1-1

Describe polarity.

• the property of water that allows some insects to walk on water.

• the property of water that allows it to stick to other surfaces, like the side of the bathtub.

• Water can choose whether it is a positively charged molecule or a negatively charged molecule, it is never both.

• In a water molecule, one end of has a positive charge (Hydrogen), while the other end has a negative charge (Oxygen).

Tags

NGSS.MS-PS1-1

How does water act like a magnet?

• the positive hydrogen ends of a water molecule are attracted to the negative oxygen ends, making them "stick" to each other, also known as cohesion

• water has two positive ends, which attracts it to anything that is negative.

• water has two negative ends, which attracts it to anything that is positive.

Which of the following images shows a singular water molecule?

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Tags

NGSS.MS-PS1-1

Which of the following is an example of surface tension in nature?

• A plant absorbing water from the ground, allowing water to defy the force of gravity

• A fish still getting its necessary nutrients even when the surface of the water is frozen.

• A spider walking on top of the water in a pond.

• The water of a swimming pool splashing when throwing an object in it.

How does ice help keep aquatic animals alive during the winter?

• since ice is less dense than liquid water, the ponds or lakes will freeze from the surface down. Allowing the rest of the body of water to be insulated by the ice.

• since ice is more dense than liquid water, the ponds or lakes will freeze from the bottom up. Allowing the fish to swim above the ice.

• the ice on the surface will not freeze all the way, allowing the fish to still swim to the surface.

Tags

NGSS.MS-LS2-4

Which property of water causes surface tension: cohesion or adhesion? (read each answer carefully)

• adhesion, because the water molecules stick to other surfaces

• cohesion, because the water molecules stick to themselves

• cohesion, because the water molecules stick to other surfaces

• adhesion, because the water molecules stick to themselves.

Which of the following best describes adhesion?

• the ability for water to stick to other surfaces such as grass or a windshield.

• the ability for solid water (ice) to float in liquid water.

• the ability for water to stick to itself.

• the ability for small insects to walk on the surface of water.

How are polar molecules able to dissolve other polar molecules?

• Polar molecules have 2 negative ends which allow the negative ends to attract other negative ends

• Polar molecules have one positive and one negative end, which allows the positive end of one to attach to the negative end of another and vise versa.

• polar molecules have 2 positive ends which allow the positive ends to attractive other positive polar molecules.

• Polar molecules do not dissolve other polar molecules because they are too much alike.

Which of the following images best shows surface tension?

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