@bot
Which of these choices are valid scientific observations? Choose all that apply.
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4 points
Yes No
The coin sank to the bottom of the gelatin cup that contained pineapple.
The coin looks gross.
The coin stayed on top of the gelatin that did not contain pineapple.
The gelatin did not change color when pineapple was added.
The coin sank to the bottom of the gelatin cup that contained pineapple.
The coin looks gross.
The coin stayed on top of the gelatin that did not contain pineapple.
The gelatin did not change color when pineapple was added.
Yes:
- The coin sank to the bottom of the gelatin cup that contained pineapple.
- The gelatin did not change color when pineapple was added.
What data could you collect from this experiment? Choose all that apply.
*
4 points
Yes No
how pineapple tastes
the amount of time gelatin without pineapple took to solidify
the amount of coins gelatin without pineapple could hold
the amount of time it took for a coin to sink to the bottom of the gelatin with pineapple added
how pineapple tastes
the amount of time gelatin without pineapple took to solidify
the amount of coins gelatin without pineapple could hold
the amount of time it took for a coin to sink to the bottom of the gelatin with pineapple added
Yes:
- The amount of time gelatin without pineapple took to solidify
- The amount of coins gelatin without pineapple could hold
- The amount of time it took for a coin to sink to the bottom of the gelatin with pineapple added
Pineapple contains a protein-digesting enzyme called bromelain. When added to gelatin, it results in the enzyme eating the proteins in the gelatin and prevents it from firming.
Based on this information, what does the pineapple contain that made it gelatin become watery?
*
2 points
The pineapple contains bromelain, a protein-digesting enzyme, that made the gelatin become watery.
Pineapple contains a protein-digesting enzyme called bromelain. When added to gelatin, it results in the enzyme eating the proteins in the gelatin and prevents it from firming.
Based on this information, what does the pineapple contain that made it gelatin become watery?
*
2 points
A. seeds
B. an enzyme called bromelain
C. sugars know as fructose
B. an enzyme called bromelain
What type of macromolecule is an enzyme?
*
2 points
carbohydrate
lipid
protein
nucleic acid
An enzyme is a protein.
To determine which of the choices are valid scientific observations, we need to understand what makes an observation scientific. A scientific observation is an objective and measurable statement about something that can be observed in the natural world.
Let's analyze each choice:
1. The coin sank to the bottom of the gelatin cup that contained pineapple.
This is a valid scientific observation because it describes a measurable event that can be observed and potentially repeated.
2. The coin looks gross.
This is not a valid scientific observation because it is subjective and not measurable. "Gross" is a subjective term that varies from person to person.
3. The coin stayed on top of the gelatin that did not contain pineapple.
This is a valid scientific observation because it describes a measurable event of the coin's behavior in relation to the gelatin, which can be objectively observed.
4. The gelatin did not change color when pineapple was added.
This is a valid scientific observation because it describes a measurable event of the gelatin's reaction to the addition of pineapple.
So, the valid scientific observations are:
- The coin sank to the bottom of the gelatin cup that contained pineapple.
- The coin stayed on top of the gelatin that did not contain pineapple.
- The gelatin did not change color when pineapple was added.