What is happening between light and an object so that we can see the object?

Light is reflecting off the object into our eyes.

Which of the following is an observation that supports the idea that light is needed in order to see objects? Very bright lights can be harmful to a person's eyes, Objects appear different in different colored lights, Objects continue to exist, even when no light reaches them, People are not able to see any objects in a room that has no light

People are not able to see any objects in a room that has no light

The correct order of how we see is: Light travels to the object then our eyes.

Light travels to the object then our eyes.

Which of the following models shows ONLY light reflecting off an object?

The model that shows only light reflecting off an object.

Which of the following models shows ONLY light transmitting through an object?

The model that shows only light transmitting through an object.

Which of the following models shows light being both reflected AND transmitted ?

The model that demonstrates both reflection and transmission of light.

There is a feather toy behind the kitty on the left. How come you cannot see it?

The light reflected off of the feather toy cannot reach your eyes.

What was the dependent variable in the experiment with the boxes, flashlight, figures, and materials (mirror, one way glass, and glass)?

the light being transmitted or reflected

What was the independent variable in the experiment with the boxes, flashlight, figures, materials (mirror, one way and glass)?

materials such as mirror, one way glass and glass

Why does water get colder when you add ice?

Heat transfers out of the water into the ice.

Which option gives the best explanation of how a cup of cold water will get to room temperature?

The room temp gas particles on the outside of the cup collide with the solid wall. The energy is then transferred from the solid wall to the cooler liquid particles inside. As the liquid particles gain energy they also increase in temperature. These collisions between the gas particles, solid wall, and liquid particles allow the regular cup to heat up more.

We tested two cup systems to determine the effectiveness of having a lid (one cup with a lid and one without). Which system did better at keeping the temperature the same and why?

The closed cup system did better at maintaining the temperature because it prevented hot air from escaping.

Who is correct about the droplets on the outside of the pitcher of lemonade: Sarah, who claims they are lemonade leaking from inside, or Regina, who says they are water from the air?

Regina because condensation droplets form from the air around/outside a container.

Which best describes a liquid?

a state of matter that has no definite shape but has a definite volume and moves by sliding past each other

Which best describes a solid?

a state of matter that has definite shape and volume and vibrates in place

Which best describes a gas?

a state of matter that has no definite shape or volume and moves freely

What was the evidence in the water droplet mass test that condensation comes from outside the cup?

The mass of the system increased.

Why can't liquids move through solids?

Solids have densely packed particles that move very little.

If we are doing an experiment to see how the amount of light shining on a cup affects how fast the water warms up, what would be the DEPENDENT VARIABLE?

temperature change of the water

Why do BOTH hot and cold liquids eventually reach ROOM temperature if left in the same environment?

The liquids either gain or loose energy until they have the same amount as the particles in the room.

What evidence did the computer particle simulation show us about energy?

All of these ideas were supported in the simulation.

Why does water get colder when you add ice?

Heat transfers out of the water into the ice to the reduce the temperature of the water.

In class, we drew models to show light shining on various cups. Based on the drawings we made in class, what is occurring in this model?

A clear cup is letting light mostly transmit and some reflect.

Which mug should be given to Dominic and Harper based on their preferences for hot cocoa?

Mug 1 should go to Dominic because it is a closed system and will retain heat longer, and mug 2 should go to Harper because it is an open system and will release energy faster.

Can temperature CHANGES occur in the water inside a cup even if there is NO light AND/ OR light doesn't transmit through the cup wall?

Yes, temperature changes can happen without light if the room is warmer than the water.

SEMESTER EXAM 2023

Flashcard

•

Other

•

6th - 8th Grade

•

Practice Problem

•

Hard

Wayground Content

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60 questions

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FLASHCARD QUESTION

Front

If you are looking through the back of Room A with a bright light shining into Room A and no light in Room B, what will you see?

Back

The objects in Room A only

FLASHCARD QUESTION

Front

In order for the music teacher to see the student, which of the following MUST be true? Light must reflect off the student and transmit through the one-way mirror to the teacher's eyes.

Back

Light must reflect off the student and transmit through the one-way mirror to the teacher's eyes.

FLASHCARD QUESTION

Front

Which best explains why the teacher sees the student? (Note: these are all true, but which one is the answer to this particular question) Options: There is a light on in the room where the student is standing and it is dark where the teacher is standing. The stronger light is bouncing off of the student, through the one-way mirror, and back to the teacher's eyes.

Back

There is a light on in the room where the student is standing and it is dark where the teacher is standing. The stronger light is bouncing off of the student, through the one-way mirror, and back to the teacher's eyes.

FLASHCARD QUESTION

Front

Why is it hard to see your phone or tablet screen in bright sunlight even though it is on?

Back

the light reflecting from the sun is so bright it is hard to detect the device's light

FLASHCARD QUESTION

Front

Which REFLECTS the MOST light? Options: mirror, one way mirror, glass, these are all the same amount of reflection

Back

mirror

FLASHCARD QUESTION

Front

Which of these would you expect to TRANSMIT the most light? mirror, one way mirror, glass, they all transmit the same amount of light

Back

glass

FLASHCARD QUESTION

Front

What things are important with the mirror phenomenon in the video we saw in class with the student and teacher? Options: how many people are in the room and the type of flooring (carpet or tile), the material from which the window/mirror is made and whether the light is on or off in each room

Back

the material from which the window/mirror is made and whether the light is on or off in each room

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