Lesson 4

Which of the following is an example of a solution?

• Sugar water
• Oil
• Sand
• Saltwater

What is a solvent?

• A solvent is a type of solute.
• A solvent is a mixture of liquids.
• A solvent is a solid that cannot dissolve anything.
• A solvent is a substance that dissolves a solute to form a solution.

A liquid that dissolves substances is a

• suspension
• solute
• solvent
• emulsion

What is a greenhouse gas?

• A greenhouse gas is a liquid that absorbs sunlight.
• A greenhouse gas is a solid that cools the atmosphere.
• A greenhouse gas is a gas that traps heat in the atmosphere.
• A greenhouse gas is a type of plant.

What do greenhouse gases do to Earth’s temperature?

• Make it warmer
  
  

• Make it cooler

• Keep it the same

• Greenhouse gases have no effect on Earth's temperature.

How much pure water do we needed to dilute 200g of 15% seawater to 10%

• 100g
• 150g
• 200g
• 50g