IQWST Pre/Post - Smell from a Distance

How does an odor get from a source to your nose?

• It moves around the container and stays there. We need to be close to the container to smell the odor.

• It travels through the air. When it gets to our noses, we smell it as we take in air.

• The odor radiates outward from the source in straight lines in all directions.

• The odor moves from object to object until it reaches your nose.

What does it mean that an odor got out of the container?

• It moved into the air in the room from the container.

• It stays in the container.

• It moved in a straight line through the container opening.

• It hovers just above the container opening.

Tags

NGSS.MS-PS1-2

Students in another science class had a sealed plastic bag full of air. The students had to decide whether the air in the bag had mass. Here are the answers that four students wrote:

a. Air does not have mass because the bag does not feel heavy.

b. Air does not have mass because the air keeps moving around.

c. Since I cannot actually measure it, air cannot have mass.

d. Air has mass, but it is probably very, very small. Which of these answers do you agree with? Explain your ideas.

• I agree with letter a. The bag is not heavy, so air does not have mass.

• I agree with letter b. The air is moving around, so it doesn't have mass.

• I agree with letter c. Air can't have mass since I can't measure it.

• I agree with letter d. Our evidence when we filled up the ball with air shows that air has mass since the ball had more mass when air was added. The mass was not much, but it still was an increase.

Imagine three 2L metal bottles. One of the containers is completely full of oxygen gas, one is half-full, and one is completely empty. All three containers look the same. Which investigation would help you to determine which container is full of gas, which is half-full, and which is empty? Explain the results that you would get with your investigation.

• I would pick up the bottles and shake them to see which one had the most oxygen. Since oxygen has mass, the one with the most oxygen would be the easiest to shake.

• I would find the mass of each metal bottle. The one with the most mass would be the container that is full, the one with the least mass would be the one that is empty. The one that is in the middle would be half-full. Since oxygen has mass, the one with the most oxygen would have the most mass.

• I would find the mass of each metal bottle. The one with the most mass would be the container that is empty, the one with the least mass would be the one that is full. The one that is in the middle would be half-full. Since oxygen has mass, the one with the most oxygen would have the most mass.

• I would find the mass of each metal bottle. The one with the most mass would be the container that is half-full, the one with the least mass would be the one that is full. The one that is in the middle would be full. Since oxygen has mass, the one with the most oxygen would have the most mass.

What is true about solids?

• The solids keep their shape.

• The solids can flow.

• The solids can go through the air by themselves.

• The solids change shape on their own.

Tags

NGSS.5-PS1-3

Which statement is true about liquids?

• The liquids keep their shape wherever they are.

• The liquids take the shape of their container and can be poured.

• The liquids can go through the air by themselves.

• The liquids are transparent.

Which is NOT a characteristic of all matter?

• All matter has mass.

• All matter takes up space.

• All matter is made of atoms.

• All matter has color.

Tags

NGSS.MS-PS1-5

Describe what happens to the air as you blow up an inflatable beach toy or an air mattress. Imagine that you are trying to describe the process to another student who was absent from school and does not know what you know about air. Choose all that apply.

• There is empty space between the air, so it is compressed when you add more air to the air mattress.

• When you add air to an air mattress, the air mattress will get bigger since air has volume.

• The pieces of air get smaller as you blow up an air mattress.

• Air has mass and volume, so the air mattress gets bigger and has more mass when air is added to it.

When an area of air is compressed, the molecules:

• Get closer together.

• Get further apart.

• Compression does not affect molecules.

• The pressure of compression makes the molecules get smaller and smaller.

What happens to the motion of the molecules when the gas is compressed?

• Compression does not affect the motion of the molecules.

• They go slower.

• They continue to move and collide with each other and the side of the container.

• All of the pressure slows the molecules down until they eventually stop moving.

Tags

NGSS.MS-PS2-2