3.7 quiz properties of water , lab safety, graphing

A lightning storm is more dangerous to someone swimming in pool water than it is to someone swimming in salty ocean water.

• true
• false

What term describes the temperature at which a substance can change state from a solid to a liquid?

• Melting point
• Boiling point
• Freezing point
• Specific heat

What age group are spending the most time with children?

• 10-20 year olds
• 30-40 year olds
• 50-60 year olds
• 60-70 year olds

In the image below, label b -What is an attraction between substances of the different kinds called ?

• surface tension
• capillary action
• adhesion
• cohesion

A water molecule is 'polar' because it looks like a seesaw: The oxygen atom is in the middle and hydrogen atoms are at opposite ends of the oxygen atom.

• true
• false

Water does not dissolve oil because

• water is ionic and oil is covalent
• oil is polar molecule and water is nonpolar molecule
• water is a polar molecule and oil is a nonpolar molecule
• water is covalent and so is oil.

What is the dependent variable in the graph below?

• price per bushel
• quantity demanded per week
• bushel
• 20 weeks

solid water floats on liquid water due to ice having a lower ___________ than liquid water.

• surface tension
• hydrogen bonds
• polarity
• density

Which of the following is NOT a property of water?

• It is a universal solvent
• it expands when it freezes
• It can erode rock
• It can change temperature quickly

Why is the climate on the coasts of countries more temperate than when travel inland.

• The ocean has a moderating effect on climate near the coast
• the land has a moderating effect onclimate far from the coast
• the city on teh coast receives more sunlight
• the city far from the coast receives more sunlight