The correct statement is:
As thermal energy increases, there is more particle movement.
This is because thermal energy is directly related to the kinetic energy of particles; as thermal energy increases, particles move more vigorously.
Which statement correctly describes the relationship between thermal energy and particle movement?(1 point)
Responses
As thermal energy increases, there is less particle movement.
As thermal energy increases, there is less particle movement.
As thermal energy increases, there is more particle movement.
As thermal energy increases, there is more particle movement.
As thermal energy increases, it is not possible to predict particle movement.
As thermal energy increases, it is not possible to predict particle movement.
As thermal energy increases, particle movement does not change.
11 answers
A scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance?(1 point)
Responses
the presence of starch
the presence of starch
the presence of lipids or fat
the presence of lipids or fat
the presence of glucose
the presence of glucose
the presence of baking powder
Responses
the presence of starch
the presence of starch
the presence of lipids or fat
the presence of lipids or fat
the presence of glucose
the presence of glucose
the presence of baking powder
If a scientist adds iodine as an indicator to an unknown substance, the indicator will reveal:
the presence of starch.
Iodine turns blue-black in the presence of starch.
A student wants to try to convince her parents to stop serving peas for dinner. She lays out her argument that peas are high in fructose, which is a type of sugar. Which test could she use to provide scientific evidence to support her argument that peas are high in fructose?(1 point)
Responses
vinegar test
vinegar test
iodine test
iodine test
brown paper bag test
brown paper bag test
Benedict's test
Responses
vinegar test
vinegar test
iodine test
iodine test
brown paper bag test
brown paper bag test
Benedict's test
The student should use:
Benedict's test.
Benedict's test is used to detect the presence of reducing sugars, including fructose. If the test shows a positive result, it would provide evidence that the peas contain fructose.
The expression like a ton of bricks means "a crushing weight." Would being hit by an actual ton of bricks hurt if it happened on the moon?(1 point)
Responses
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have more weight.
Yes, it would hurt because the bricks would still have more weight.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have little mass.
Responses
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have the same mass.
Yes, it would hurt because the bricks would still have more weight.
Yes, it would hurt because the bricks would still have more weight.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have little mass.
The correct response is:
Yes, it would hurt because the bricks would still have the same mass.
While weight is affected by the gravitational force of the moon (which is about 1/6th that of Earth), the mass of the bricks remains unchanged. Therefore, being hit by a ton of bricks, regardless of location, would still have significant mass and cause harm.
What measurement is affected by gravity?(1 point)
Responses
mass
mass
density
density
weight
weight
inertia
Responses
mass
mass
density
density
weight
weight
inertia
The measurement that is affected by gravity is:
weight.
Weight is the force exerted by gravity on an object, and it changes depending on the gravitational pull of the celestial body the object is on. Mass, on the other hand, remains constant regardless of the gravitational field.
What happens to the density of a material if you have a larger piece of it?(1 point)
Responses
The density will be greater because the mass increases but the volume remains the same.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will remain the same.
The density will remain the same because mass and volume will remain the same.
The density will be smaller because the mass remains the same as the volume increases.
Responses
The density will be greater because the mass increases but the volume remains the same.
The density will be greater because the mass increases but the volume remains the same.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will both increase in the same way.
The density will remain the same because mass and volume will remain the same.
The density will remain the same because mass and volume will remain the same.
The density will be smaller because the mass remains the same as the volume increases.
The correct response is:
The density will remain the same because mass and volume will both increase in the same way.
Density is defined as mass divided by volume (density = mass/volume). If you have a larger piece of a material, both its mass and volume increase proportionally, so the density remains constant.