Matter and Change

Which of the following substances can water get rid of ALONE (no other substances needed)

• oil
• greasy or oily foods
• stains
• mud

What is the universal solvent?

• dish soap
• water
• oxygen
• nitrogen

Khalil cuts a stick of butter in half. Which statement about the butter is TRUE?

• the butter has changed state
• the butter has different ingredients
• the butter has kept its shape
• the butter has different physical properties

These ice cubes were taken from the freezer and set out on the counter. This picture shows what the ice looks like 5 minutes later. What is causing this physical change?

• heat energy is moving from the ice to the air
• heat energy is moving from the air to the ice
• heat energy is causing the liquid water to freeze
• heat energy is moving between the two ice cubes

On a hot summer day, Jenna pours juice in an ice cube tray, puts it in the freezer, and removes it a bit later to see that the juice is frozen. How many physical changes took place from the time Jenna poured the juice to when it came out of the freezer?

• 1
• 2
• 3
• 4

Mario is oiling the wheels of his skateboard. He tries to wash the oil off his hands with only water, but nothing happens. What would happen if he added a few drops of dish soap?

• the oil would stick to his hands
• the oil would change into a gas
• the oil, water, and soap would form a solution
• the soap would help break up the oil into smaller drops

Which statement about mixtures and solutions is TRUE?

• all mixtures are solutions
• all solutions are mixtures
• all mixtures contain two types of matter
• all solutions contain two types of matter

Luke's science class is learning about mixtures and solutions. His teacher shows the class 4 beakers. Which beaker contains a solution?

• beaker A
• beaker B
• beaker C
• beaker D

Water, drink mix, and ice cubes are mixed in a pitcher. The drink mix dissolves. Which substance is the solvent?

• the drink mix
• the water
• the ice cubes
• the pitcher

Sophia is thinking of ways to speed up the rate at which a tablespoon of salt would dissolve in water. Which factor would have the LEAST effect?

• water temperature
• salt particle size
• air temperature
• stirring rate