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
mass
Two children on a seesaw are able to balance perfectly while on Earth. Would they still be balanced if the seesaw was brought to the moon?(1 point)
Responses
No, they would not be balanced because their masses would change.
No, they would not be balanced because their masses would change.
Yes, they would still be balanced because their weights would not change.
Yes, they would still be balanced because their weights would not change.
Yes, they would still be balanced because their masses would not change.
Yes, they would still be balanced because their masses would not change.
No, they would not be balanced because their weights would change.
No, they would not be balanced because their weights would change.
Yes, they would still be balanced because their weights would not change.
Bailee explained that when traveling to the moon, he needs to pack light because the weight of objects on the moon is the same as their weight on Earth. The mass of the objects is what changes when the gravitational pull changes. Is Bailee correct in his explanation?(1 point)
Responses
Bailee is incorrect. The mass of the objects stay the same but weight will change.
Bailee is incorrect. The mass of the objects stay the same but weight will change.
Bailee is incorrect. Both the mass and weight will change.
Bailee is incorrect. Both the mass and weight will change.
Bailee is incorrect. Both the mass and weight will stay the same.
Bailee is incorrect. Both the mass and weight will stay the same.
Bailee is correct. The weight of the objects stay the same but mass will change.
Bailee is incorrect. The mass of the objects stay the same but weight will change.
A scientist is working in a lab and accidentally combines two liquids that quickly form a solution. Which process could be used to separate the two liquids?(1 point)
Responses
heating the liquids and letting one boil away first
heating the liquids and letting one boil away first
waiting for the two liquids to separate
waiting for the two liquids to separate
collecting one of the liquids with a spoon
collecting one of the liquids with a spoon
passing the liquids through a filter to collect one of them