Matter and Energy

The photograph shows a laser cutting a sheet of metal as the laser moves from one end of the metal to the other.

Four groups of students each made a table of examples of the different types of energy involved in this process. Which of these tables is correct?

• 
• 
• 
• 

Eight activities that use energy are listed in the box.

Each of these activities requires the use of which kind of energy?

• Thermal

• Mechanical

• Electrical

• Sound

A student wants to classify four different objects based on physical properties. The student uses the questions shown in the table to test each object.

• Material 1 is a rubber ball. Material 2 is a piece of cardboard.

• Material 2 is an aluminum washer. Material 3 is a copper wire.

• Material 3 is a piece of cardboard. Material 4 is an aluminum washer

• Material 1 is a copper wire. Material 4 is a rubber ball.

A student recorded the time it took for all the water in a puddle on a sidewalk to evaporate after a rain. Which kind of energy causes water to evaporate?

• Light energy from streetlights

• Sound energy from passing cars

• Thermal energy from the environment

• Mechanical energy from nearby streets

Students fill a cart with books. The cart has a handle on each end

Which actions will make moving the cart in one direction easiest for the students?

• Student 1 pulls the cart to the left while Student 2 pulls the cart to the right.

• Student 1 pulls the cart to the left while Student 2 pushes the cart to the left.

• Student 1 pushes the cart to the right while Student 2 pushes the cart downward.

• Student 1 pushes the cart to the right while Student 2 pulls the cart upward.