Grade 1/2nd Semester/2nd Assessment/Online Reviewer

An animal will make a sound to signal there is __________ nearby.

• Danger

• Water

Answer explanation

Animals often make sounds to alert others of potential danger nearby. This behavior is crucial for survival, as it helps warn others of threats, making 'Danger' the correct answer.

The young birds are chirping. The mother responds by __________?

 

• bringing them food

• flying away

Answer explanation

The young birds chirping indicates they are hungry or seeking attention. The mother bird typically responds by bringing them food, which is a natural behavior to care for her young.

What will a baby chick do to communicate that its hungry?

• it will make a sound

• it will stay silent and wait

Answer explanation

A baby chick communicates hunger by making sounds. This vocalization signals to its mother or caregivers that it needs food, while staying silent would not effectively convey its needs.

TRUE or FALSE:

Sounds comes from vibrations.

• TRUE

• FALSE

Answer explanation

TRUE: Sounds are produced by vibrations that travel through a medium, such as air, water, or solids. When an object vibrates, it creates sound waves that we can hear.

TRUE or FALSE:

Volume is how loud or soft a sound is.

• TRUE

• FALSE

Answer explanation

TRUE: Volume refers to the loudness or softness of a sound. It measures how intense a sound is, making this statement correct.

TRUE or FALSE:

Pitch is how high or how low a sound is.

• TRUE

• FALSE

Answer explanation

TRUE: Pitch refers to the perceived frequency of a sound, determining how high or low it sounds. Higher frequencies result in higher pitches, while lower frequencies produce lower pitches.

TRUE or FALSE:

Clapping your hands will not make a sound.

• TRUE

• FALSE

Answer explanation

The statement is FALSE because clapping your hands produces sound due to the rapid movement and collision of your hands, creating vibrations in the air that we perceive as sound.

TRUE or FALSE:

Sound waves cannot travel through things.

• TRUE

• FALSE

Answer explanation

FALSE is correct because sound waves can travel through various mediums, including solids, liquids, and gases. They require a medium to propagate, so the statement that they cannot travel through things is incorrect.

What are some different ways animals can communicate?

Choose two (2) answers.

• makes sounds

• move its body

• writes a message

Answer explanation

Animals communicate in various ways, including making sounds (like vocalizations) and moving their bodies (such as through gestures or postures). Writing messages is not a method used by animals.

Big vibrations will make __________ sound.

Answer explanation

Big vibrations produce loud sounds due to the increased energy and movement of air particles, which amplifies the sound waves. Therefore, the correct choice to fill in the blank is 'loud'.