What does temperature measure?(1 point)
Responses
the average kinetic energy of the particles
the average kinetic energy of the particles
the heat of the particles
the heat of the particles
the total energy of the particles
the total energy of the particles
the empty space between the particles
the average kinetic energy of the particles
A chemistry class is experimenting with iodine to see which common white powder items will react and make the iodine change color. Which item listed will have a chemical reaction with iodine?(1 point)
Responses
cornstarch
cornstarch
salt
salt
baking soda
baking soda
powdered sugar
baking soda
When performing a scientific investigation on an unknown substance, how can an indicator help you determine if the substance is a starch?(1 point)
Responses
The indicator will change the smell of the substance.
The indicator will change the smell of the substance.
The indicator will change the color of the substance.
The indicator will change the color of the substance.
The indicator will change the state of the substance.
The indicator will change the state of the substance.
The indicator will change the taste of the substance.
The indicator will change the color of the substance.
A student has an unknown powder and wants to determine what it is. Based on appearance, the student believes it is baking soda. When performing the vinegar test, what can the student expect to happen if it is baking soda?(1 point)
Responses
it will turn into a solid glass-like substance
it will turn into a solid glass-like substance
it will bubble and foam
it will bubble and foam
it will crystallize into a sugar-like substance
it will crystallize into a sugar-like substance
it will turn a blue-black color
it will bubble and foam
A student is performing a Benedict’s test on an unknown substance. The student adds the reagent (the chemical required to make a color change), and nothing happens. Which conclusion can the student make?(1 point)
Responses
The test was inconclusive because the student needed to also test with iodine or vinegar.
The test was inconclusive because the student needed to also test with iodine or vinegar.
The substance is not glucose based.
The substance is not glucose based.
The substance is glucose based.
The substance is glucose based.
The test was inconclusive because the student forgot to add heat.
The substance is not glucose based.
You are unable to lift an object. Which property makes the object difficult to lift?(1 point)
Responses
density
density
mass
mass
volume
volume
weight
weight