Science Unit 2 Practice

Identify two internal eye structures from the list below.

• Pupil

• Lens

• Eyelash

• Retina

How would birds know to avoid eating these animals?

Select the statement that describes external eye structures and what they do."

• The lens blocks out light and the retina allows you to see color.

• Sunglasses protect your eyes from the sun and contact lenses help to make an image blurry.

• The pupil lets in light and the eyelashes protect the eye from dirt.

• The pupil blocks out light and the iris protects the eye from dirt.

In one experiment we learned about songbirds and how some behaviors are learned over a period of time. Give an example of a learned behavior.

Identify the three major parts of human nervous system.

• The skeleton, the heart, and the lungs.

• The stomach, the small intestine, and the large intestine.

• The brain, the spinal cord, and the nerves.

• The eyes, the hands, and the feet.

Why were you not able to see the ball in the box when the cardboard divider was placed in front of the ball?

• The cardboard divider blocks the light needed for your eyes to view the ball.

• The ball is too small to see with your eyes.

• The brain is not communicating with your eyes.

Nightingales are songbirds that sing to find a mate. What do nightingales do when there is too much noise in the environment and the other birds cannot hear them sing? Use the graph to help you answer this question.

• As the environmental noise gets louder, nightingales sing more quielty.

• The level of environmental noise does not change the volume of the nightingale's singing.

• As the environmental noise gets louder, nightingales sing louder.

A scholar is signaling that he/she has to use the bathroom. There is no teacher in the room see their signal. Is this a form of communication?

• A.Yes, this is a form of communication because there is a signal.

• No, this is not a form of communication because there is not a "SENDER" to send the signal.

• No, this is not a form of communication because there is not a "RECIEVER" to see the signal.

During the Firefly Flashes activity, we used a flashing light to learn how fireflies flashes help them to communicate to find a mate.

• The flashing lights show exactly how fireflies communicate.

• The flashing lights are a "model" of how the fireflies communicate.

• The flasing lights have nothing to do with how fireflies actually communicate.

How Has Human Communication Changed Over Time Give TWO EXAMPLES