Science Review

Some students make a toy car like the one shown below. The students fill the balloon with air and then release the balloon in order to make the car move. Which statement best describes what the students will most likely observe when they release the balloon?

• The toy car will use sound energy and produce electrical energy

• The toy car will use mechanical energy and produce sound energy.

• The toy car will use electrical energy and produce light energy.

• The toy car will use thermal energy and produce mechanical energy.

While a submarine is underwater, it makes sounds as it travels, and it uses the sounds' echoes to locate objects that are nearby. When the submarine moves and listens to echoes to locate objects, it is using -

• mechanical energy and sound energy

• light energy and mechanical energy

• sound energy and thermal energy

• thermal energy and light energy

Some students build the circuit shown below. The students observe that the speaker is not producing sound. Which of the following best describes why the students do not hear sound?

• The battery is facing the wrong direction

• The circuit needs a light bulb to allow electricity to flow

• The wire that connects the speaker is too thick

• The speaker does not have a complete path to the battery

When electricity flows in a complete path, it can produce other forms of energy. In addition to light energy, which of these is produced as electric current flows through the circuit of a computer screen?

• Force

• Mass

• Heat

• Mechanical Energy

A group of students built the circuit shown below. To turn on the light bulb, which of the following switches should be closed?

• Switches R and S only

• Switches R and T only

• Switch S only

• Switches R, S, and T

A student uses a set of headphones to listen to music. Which of these objects uses the same source of energy as the headphones?

• A flute using wind energy

• A piano using mechanical energy

• A keyboard using electrical energy

• A teapot using thermal energy

A class is learning about states of matter. The teacher shows the students how to set up the investigation shown in the diagram.

What kinds of energy are needed in this investigation to change the state of matter of the candle?

• Light, mechanical, and thermal

• Electrical and thermal

• Mechanical, light, and electrical

• Thermal and mechanical

The diagram shows a series circuit with three lit bulbs. How many bulbs will remain lit if the wire is cut at the point shown by the arrow?

• O

• 1

• 2

• 3

Mrs. Aguirre and Mrs. Gatt teach Science

• True

• False

I tried my best!

• True

• False