4th Grade Review 1

Speaking tubes have been used on boats and in houses. A person speaks into one end of the speaking tube. Someone listens at the other end. Speaking tubes can be 90 meters long. They can be straight, bent, or curved. What design problem would speaking tubes best solve?

• A person needs to be heard by someone far away or in another room

• A person needs to be heard over loud noises in the background

• A person needs to be heard by everyone in a large crowd

• A person's voice needs to be much louder

2.)Marcos made an instrument by stretching two rubber bands around the nails on the board. Both of the rubber bands were exactly the same before they were stretched. When Marcos plucks the rubber bands, the rubber band that is stretched the tightest will most likely

• Be quieter than the other rubber band.

• Have a higher pitch than the other rubber band.

• Not make any sound at all

• Sound exactly the same as the other rubber band.

Which of the following sounds would be produced by fast, weak vibrations?

• high-pitched, loud sound

• low-pitched, soft sound

• high-pitched, soft sound

• low-pitched, loud sound

Julia did an experiment using drums. She compared the vibrations she felt and the pitch she heard listening to two different drums.Her data is shown in the table below.

Data From Drum Investigation

Type of Drum Vibrations Felt Pitch Heard

Bass Drum slower vibrations lower pitch

Snare Drum faster vibrations higher pitch

Which conclusion fits the data she gathered?

• Faster vibrations make higher-pitched sounds.

• Slower vibrations make higher-pitched sounds

• The type of drum does not affect the pitch.

• larger drums make higher-pitched sounds

What kind of vibration is required to create a low-pitched sound?

• fast

• slow

• strong

• weak

​Light can pass through a stained glass window, but it is hard to see clearly through the colored glass.

Which word best describes the stained glass window?

• translucent

• reflective

• transparent

• opaque

In the picture a beam of light is shining on the water.What happens to the beam of light when it hits the water?

• Most of the light is absorbed

• Most of the light is reflected.

• Most of the light is bent and redirected

• Most of the light travels in the same direction.

Juan puts a pencil into a glass of water. The pencil appears to bend at the point where it enters the water. What causes the pencil to look bent?

• The water in the glass absorbs incoming light waves so light cannot pass through the water.

• The light waves traveling through the glass are reflected by the pencil when it is underneath the water.

• The water in the glass changes incoming light waves into a different form of energy.

• The light waves traveling through the glass are refracted as the waves pass from air to water.

Objects can be seen clearly through a glass surface because it transmits most of the light striking it. Glass is an example of a(n) _______ material.

• transparent

• opaque

• invisible

• translucent

magnifying glass makes use of the fact that light _______ when it travels from one medium to another.

• is absorbed

• moves in a straight line

• is refracted

• is reflected