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Sagot :
Sure, let's complete the table step-by-step using the given answer.
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| | Reactants Observations Before Interaction | Products Observations After Interaction | How was Mass Conserved? Use numbers to explain your answers. | Proof of a Chemical Reaction or Physical Change |
|----------------------------------------|---------------------------------------------------|----------------------------------------------------------|------------------------------------------------------------------|----------------------------------------------------------------------|
| Example: Steel Wool + Oxygen (Fire) | There are 6 grams of steel wool. It is grey with a stringy texture. There is 1 gram of oxygen in the tank. | There are 7 grams of iron oxide. | The total mass before interaction (6g steel wool + 1g oxygen) is 7 grams, which is equal to the mass after interaction (7g iron oxide). | This was a chemical reaction, as new substances (iron oxide) formed from the reactants. |
| Egg + Heat | There is 1 egg (41 grams) and 4 grams of thermal energy (heat). | There is one cooked egg (41 grams) and some broken pieces of eggshells (4 grams). | The total mass before interaction (41g egg + 4g heat) is 45 grams, which is equal to the mass after interaction (41g cooked egg + 4g eggshells). | This is a physical change, as the egg was cooked but no new substances were formed. |
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In this table, we have:
1. Reactants Observations Before Interaction: This column lists a detailed description and masses of the reactants.
- Steel Wool + Oxygen: 6 grams of steel wool and 1 gram of oxygen.
- Egg + Heat: 41 grams of egg and 4 grams of thermal energy (heat).
2. Products Observations After Interaction: This column lists a detailed description and masses of the products.
- Steel Wool + Oxygen: 7 grams of iron oxide.
- Egg + Heat: 41 grams of cooked egg and 4 grams of broken eggshells.
3. How was Mass Conserved? Use numbers to explain your answers: This column explains how the mass was conserved.
- Steel Wool + Oxygen: The sum of the masses of steel wool and oxygen (6g + 1g = 7g) equals the mass of iron oxide formed (7g).
- Egg + Heat: The sum of the masses of the egg and heat (41g + 4g = 45g) equals the mass of the cooked egg and eggshells (41g + 4g = 45g).
4. Proof of a Chemical Reaction or Physical Change: This column describes whether a chemical reaction or physical change occurred with justifications.
- Steel Wool + Oxygen: This is a chemical reaction because a new substance (iron oxide) is formed.
- Egg + Heat: This is a physical change because even though the egg changes state (cooks), no new substances are formed.
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| | Reactants Observations Before Interaction | Products Observations After Interaction | How was Mass Conserved? Use numbers to explain your answers. | Proof of a Chemical Reaction or Physical Change |
|----------------------------------------|---------------------------------------------------|----------------------------------------------------------|------------------------------------------------------------------|----------------------------------------------------------------------|
| Example: Steel Wool + Oxygen (Fire) | There are 6 grams of steel wool. It is grey with a stringy texture. There is 1 gram of oxygen in the tank. | There are 7 grams of iron oxide. | The total mass before interaction (6g steel wool + 1g oxygen) is 7 grams, which is equal to the mass after interaction (7g iron oxide). | This was a chemical reaction, as new substances (iron oxide) formed from the reactants. |
| Egg + Heat | There is 1 egg (41 grams) and 4 grams of thermal energy (heat). | There is one cooked egg (41 grams) and some broken pieces of eggshells (4 grams). | The total mass before interaction (41g egg + 4g heat) is 45 grams, which is equal to the mass after interaction (41g cooked egg + 4g eggshells). | This is a physical change, as the egg was cooked but no new substances were formed. |
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In this table, we have:
1. Reactants Observations Before Interaction: This column lists a detailed description and masses of the reactants.
- Steel Wool + Oxygen: 6 grams of steel wool and 1 gram of oxygen.
- Egg + Heat: 41 grams of egg and 4 grams of thermal energy (heat).
2. Products Observations After Interaction: This column lists a detailed description and masses of the products.
- Steel Wool + Oxygen: 7 grams of iron oxide.
- Egg + Heat: 41 grams of cooked egg and 4 grams of broken eggshells.
3. How was Mass Conserved? Use numbers to explain your answers: This column explains how the mass was conserved.
- Steel Wool + Oxygen: The sum of the masses of steel wool and oxygen (6g + 1g = 7g) equals the mass of iron oxide formed (7g).
- Egg + Heat: The sum of the masses of the egg and heat (41g + 4g = 45g) equals the mass of the cooked egg and eggshells (41g + 4g = 45g).
4. Proof of a Chemical Reaction or Physical Change: This column describes whether a chemical reaction or physical change occurred with justifications.
- Steel Wool + Oxygen: This is a chemical reaction because a new substance (iron oxide) is formed.
- Egg + Heat: This is a physical change because even though the egg changes state (cooks), no new substances are formed.
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