Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
Directions: Use the information provided and your knowledge of Physical Science to answer the following questions. Show all work where necessary.
Source: https://ar.inspiredpencil.com/pictures-2023/dissolving-sugar-and-water
Students stir sugar into a cup of clear water. The sugar crystals can be seen at first, but after stirring, they “vanish.” The water still tastes sweet and has more mass than before. If the sugar cannot be seen, is it still there?
This helps students model that matter is made of particles too small to be seen.
When sugar dissolves in water, it looks like the sugar disappears, but it does not. Sugar is made of tiny particles that are much too small to see. Water is also made of particles. When sugar is stirred into water, water particles move around and bump into the sugar crystals. These bumps break off tiny sugar particles and pull them into the spaces between the water particles.
As stirring continues, the entire sugar crystal breaks apart into particles that are spread throughout the water. Even though you cannot see the particles, they are still there. You can taste the sweetness because your tongue detects sugar particles. You can also measure them. The mass of the cup increases when sugar is added, which means the sugar did not disappear. It changed from visible crystals to invisible particles.
The water also becomes slightly denser, which is another clue that sugar particles are mixed into it. These observations help scientists describe matter as being made of particles too small to be seen. Dissolving sugar in water is strong evidence that matter stays present even when it becomes invisible to the eye.
Sugar Added (g) | Mass Before (g) | Mass After (g) |
|---|---|---|
5 | 150 | 155 |
10 | 150 | 160 |
15 | 150 | 165 |
Sugar Added (g) | Volume of Water (mL) | Final Volume (mL) | Density (g/mL) |
|---|---|---|---|
0 | 150 | 150 | 1 |
10 | 150 | 152 | 1.05 |
20 | 150 | 154 | 1.09 |
Look at Table 1. How does the mass of the cup and water change as more sugar is added, even though the sugar cannot be seen?
After the sugar dissolves and can no longer be seen, which statement is best supported by the data?
Using Figure 1, describe the pattern between the amount of sugar added and the final mass of the solution.
Look at Table 2. How does adding sugar affect the density of the water?
Which piece of evidence best supports the idea that matter is made of particles too small to be seen?
How does dissolving sugar in water support the idea that matter is made of particles too small to be seen?
Respond using the structure below:
Claim:
Evidence:
Reasoning: