Comprehension - Our Ears - Year 4/5

The word in the text that has the same meaning as "keep safe" is "protect".

Our ears pick up sound vibrations. This is true because the middle ear picks up the vibrations of sound and transfers them to the inner ear. In the inner ear, these vibrations are changed into nerve signals that travel to the brain, allowing us to hear and interpret sounds.

Loud music can indeed measure one hundred decibels. Decibels are a unit used to measure the intensity or loudness of sound. A decibel level of 100 is considered very loud and can cause damage to the ears if exposed to for a prolonged period of time. Therefore, the statement is true.

Wiggling our ears does not help us hear more efficiently. The ability to wiggle our ears is a vestigial trait, meaning it is a remnant of our evolutionary past and does not serve a functional purpose in modern humans. Our ears are designed to capture sound waves and transmit them to our brain for processing, and wiggling our ears does not enhance this process in any way. Therefore, the statement is false.

The word "danger" has the same meaning as "harm" as it refers to a situation or condition that poses a risk or threat to someone's well-being or safety. The first letter "d" matches with the word "danger" in the answer options.

The middle ear picks up vibrations and transfers them to the inner ear. The middle ear consists of three small bones called the ossicles (malleus, incus, and stapes) that amplify and transmit sound vibrations from the eardrum to the inner ear. These vibrations are then converted into electrical signals by the inner ear and sent to the brain for processing. The middle ear plays a crucial role in the process of hearing by transmitting sound waves effectively from the outer ear to the inner ear.

The inner ear helps keep our balance by having fluid-filled canals that stay level. These canals contain sensory cells with tiny hairs that detect the movement of the fluid when we change positions. This information is then sent to the brain, which helps us maintain our balance.

The middle ear does not change nerve signals into vibrations. Instead, it acts as a bridge between the outer ear and the inner ear, transmitting sound vibrations from the eardrum to the inner ear. The inner ear is responsible for converting these vibrations into nerve signals that can be interpreted by the brain. Therefore, the correct answer is false.

Cats move their ears not to hear better, but to locate the source of a sound more accurately. Their ears have the ability to rotate and move independently, allowing them to pinpoint the direction from which a sound is coming. This helps them in hunting and being aware of their surroundings. Therefore, the statement that cats move their ears in order to hear better is false.

The statement is false because our outer ear does not have fluid-filled canals. The outer ear consists of the pinna and the ear canal, which are both made of cartilage and skin. The fluid-filled canals are actually part of the inner ear, specifically the cochlea, which is responsible for converting sound vibrations into electrical signals that can be interpreted by the brain.

Sound is not measured in vibrations. Sound is measured in units of frequency, such as hertz (Hz), which represents the number of vibrations per second. Vibrations are the physical phenomenon that creates sound, but the measurement of sound itself is done in terms of frequency. Therefore, the statement that we measure sound in vibrations is incorrect.

The word "moves" refers to actions or activities that involve changing one's position or location. The word "transfers" has a similar meaning as it also involves moving from one place to another. Similarly, "travel" and "travels" also refer to the act of moving or going from one place to another. "Transfer" and "Travel" are also synonyms for "moves" as they indicate the action of changing position or location.

The word that has the same meaning as "always" and starts with the letter "c" is "constant". "Constant" means something that remains the same or continues without change. It can also be used to describe something that is consistent or unchanging. "Constantly" and "Constantly" are variations of the word "constant" and have the same meaning.

The word "quivers" means to shake or tremble. The word that has the same meaning and starts with the letter "v" is "vibrates".