grade 4 Ns and tech sound and energy quiz

how does the size and shape of an object affect the sound it produces

• A Larger object may producea deeper sound than a smaller object

• A Larger object may produce an shallow sound than a smaller object

• a Smaller object may produce a deeper sound than the larger object

• none of the above

Our ears detect ... as they travel through the air and vibrate the eardrum. The brain then interprets these vibrations as sound.

(a)  

What is an echo?

Answer explanation

An echo is a reflection of sound waves off a surface, resulting in the repetition of the sound after a delay

What is the standard unit of measurement for length on a tape measure?

• Cm

• Inches

• metres

• Feet

• All of the above

What is the smallest unit on a meter stick

• cm

• m

• mm

• None of the above

When using a tape measure to measure length, it is important to ensure that the tape measure is ... along the object being measured and that it is not ..., as this can lead to inaccurate measurements.

(a)  

To measure length using a trundle wheel, you push the wheel along the surface in a straight line. The wheel records the ... covered in rotations, allowing you to calculate the total length measured.

(a)  

How do you measure an object with a tape measure?

Answer explanation

To measure an object with a tape measure, you place the beginning of the tape measure at one end of the object and pull the tape measure along the length of the object until you reach the other end. Then, read the measurement where the tape measure stops.

What is a trundle wheel?

Answer explanation

A trundle wheel is a measuring tool that consists of a wheel attached to a handle. It is commonly used to measure long distances accurately.

How many mm make up a centimeter

• 02

• 01

• 07

• 10

• I don't know🤷🏽