Sci 6 Q3 Lesson 26 Sound, Heat, and Light

Sound, heat, and light are related to __________ energy.

It is produced by hitting two objects together, or by vibrating bodies.

It gets passed on from bodies of higher temperatures to bodies of lower temperatures.

It is transported through electromagnetic waves.

Heat from a coffee is transferred to the spoon.

• True

• False

Sound is made by __________.

I. colliding objects

II. heated objects

III. vibrating objects

• I only

• II only

• I and III

• I, II, and III

Why is sound used for taking pictures of babies inside the womb?

• Sound is the least harmful among sound, light, and heat.

• The babies inside the womb can already hear sounds, but cannot see yet.

• Light will not pass through the mother's skin and flesh, while heat will just be absorbed and will not be reflected.

• Sound can be transmitted safely through human tissues and fluids, and can be reflected back to be used for imaging.

Bats use sound to navigate through caves and to track flying insects. This is called __________.

• echolocation

• ultrasonic imaging

• extrasensory hearing

• sound navigation and ranging

Could a huge block of ice at 0°C have more heat in it that a cup of water at 4°C?

• Ye. It has a lot more moving molecules that the cup of water.

• Yes. If the block of ice is exposed to sunlight and absorbs some energy.

• No. It is at a lower temperature, and so it has less heat.

• No. It is in the solid phase, while the cup of water is in the liquid phase.

Which of the following best demonstrates how kinetic energy is converted to heat?

• Fanning yourself keeps you cool even in warm weather.

• A runner's shoes become warm after an hour of running.

• Stirring hot coffee using a spoon helps cool the coffee faster.

• While water is heat in a spot, its molecules move faster and faster.