IQWST PS1 Unit 1 Review- Can I Believe My Eyes?

Which material allows the least amount of light to pass through it so that the smallest amount of light reaches the eyes?

• air

• eyeglasses

• sunglasses

• all allow the same amount of light

Tags

NGSS.MS-PS4-2

In the following picture, how does the house make a shadow?

• The sunlight travels around the house and shines on the ground directly behind it.

• Houses always make shadows whether there is a source of light or not.

• The house blocks all the sunlight from reaching the ground.

• The house blocks the sunlight creating a shadow on the ground where no sunlight reaches. The light only reaches the area surrounding the shadow.

Tags

NGSS.MS-PS4-2

The power is out in your house, and you want to call a friend to see if the power is out in her house too. But your phone is in your backpack! You put your backpack down somewhere before the power went out and you cannot remember where it is. First, you must find the backpack in the dark using a flashlight.

How are you able to see the backpack?

• Light bounces off the backpack in all directions.

• Light only bounces off the backpack to my eye.

• Light is absorbed by the backpack.

Tags

NGSS.MS-PS4-2

Which of the following correctly describes how light reaches your eye?

• All of the light travels from the backpack to your eye, allowing you to see.

• Some of the light travels from the backpack to your eye, allowing you to see.

• All of the light travels from your eye to your backpack, allowing you to see.

• Some of the light travels from your eye to your backpack, allowing you to see.

Tags

NGSS.MS-PS4-2

Select the answer that best describes what needs to occur for you to be able to see a tree through a window.

• Light from the sun transmits through the window in a straight path and hits my eyes. Then, I can see the tree.

• Light from the sun hits the tree. Some of the light that bounces off the tree reaches the window. Most of the light goes through the window. I see the the tree as the light reaches my eyes.

• Some of the sunlight scattered from the tree travels in a straight path to the window where it is absorbed. When the absorbed light reaches my eyes, it is detected and I can see the tree.

• Light leaves the sun and travels in all directions. Since some light hits the tree I can see the tree.

Tags

NGSS.MS-PS4-2

There are things wrong with the shadow of the person in the picture. Which of the following is one thing wrong with the picture?

• The shadow is too tall.

• The shadow is not dark enough.

• The shadow is too wide.

• The shadow is not the correct shape.

What amount of red, green, and blue light is necessary to make black?

• A little bit of red, green, and blue light is needed to make black.

• A lot of red, green, and blue light is needed to make black.

• No amount of red, green, and blue light is needed to make black.

Which of the following explanations are true? [Select two.]

• Air transmits all light.

• Eyeglasses reflect most of the light that reaches them.

• Sunglasses transmit almost all of the light that reaches them.

• Eyeglasses transmit almost none of the light that reaches them.

• Sunglasses absorb most of the light that reaches them and transmit the rest.

Tags

NGSS.MS-PS4-2

What is the best explanation for why the road gets hotter than the sidewalk?

• The road is a darker color, so it absorbs more sunlight. The more light an object absorbs, the hotter it will get.

• The sidewalk is a lighter color, so it absorbs more sunlight. The more light an object absorbs, the cooler it gets.

• The sidewalk is shaded by trees, so no light reaches the sidewalk and it does not heat up.

Tags

NGSS.MS-PS1-4

Look at the red and green light waves in figure 2. Which statement best describes the difference between the red and green light waves?

• The red light wave has a larger wavelength and lower frequency than the green light wave.

• The green light wave has a larger wavelength and lower frequency than the red light wave.

• The red light has a smaller wavelength and higher frequency than the green light wave.