Science 5

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

• The butter has different physical properties

• The butter has kept its shape

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

Air is a mixture that contains about 80 percent nitrogen and about 20 percent oxygen. Which statement is true?

• Oxygen is a solvent

• Nitrogen is a solvent

On a hot summer day, Jenna poured juice into an ice cube tray. She put the tray into the freezer. When she removed the tray, the juice was frozen. How many physical changes took place from the time Jenna poured the juice until it came out of the freezer?

• 1

• 2

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, water, and soap would form a solution

• The soap would help break up the oil into smaller drops.

Which of the following is a physical change?

• burning

• evaporating

What is a mixture?

• a combination of two or more substances that keep their identities

• any type of matter that evaporates when heat energy is added to it

Matter can undergo both chemical and physical changes. Which of the following is a physical change?

• making a solution

• tarnishing

Toni mixes chocolate powder in her milk. She notices that the chocolate powder dissolves. Based on her observations, what can Toni conclude?

• The chocolate powder is a solute

• The chocolate powder is a solvent

Luis’s teacher asks him to make a solution using a sugar cube and water. The pictures below show what the beaker looks like as he prepares the solution.

• Beaker B

• Beaker D