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The main idea of this passage is (a)   .

• Water vapor rises and cools into cl

• The amount of water on Earth doesn’

• Oceans are salty because rivers col

• Everything needs water to live.

Answer explanation

The main idea of this passage is that oceans are salty because rivers contribute dissolved salts to them.

Tags

SL.3.2

Part B: What has to happen before water can rise into the air as water vapor? (RI.3.1, RI.3.3)

Answer explanation

Water must undergo the process of evaporation before it can rise into the air as water vapor.

Tags

RI.3.1

RI.3.3

What does the prefix “re” mean in the word recycling? Underline the best answer. (RI.3.4, L.3.4b)

• new

• circular

Answer explanation

The prefix 're' in the word recycling means 'again', indicating that something is being done once more. Therefore, the best answer is 'again'.

Tags

RI.3.4

L.3.4.b

What percentage of the human body is made up of water?

• 50%

• 70%

• 60%

• 80%

Why is water considered an excellent solvent?

• Because it is abundant

• Because it is polar

• All of the above

• Because it is liquid at room temperature

What property of water decreases the attraction between ions of different charges?

• Hydrogen bonding

• Electronegativity

• Polarity

• Dielectric property

What is the role of electrolytes in the body?

• To increase water absorption

• To provide energy

• To break down food molecules

• To carry electrical signals

Who discovered that substances dissolved in water conduct electric currents?

• Svante Arrhenius

• Michael Faraday

• William Whewell

• Heiko Langner

How does hydrogen peroxide act as a bleach?

• By increasing the water content in the laundry

• By reducing the color molecules

• By adding oxygen to the stains

• By oxidizing the stain molecules

What is the molarity of a solution?

• The weight of solute per liter of solution

• The number of moles of solute per liter of solution

• The number of solute molecules per liter of solution

• The volume of solute per liter of solution