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Which statement correctly describes the relationship between thermal energy and particle movement?(1 point)

Responses

As thermal energy increases, there is more particle movement.
As thermal energy increases, there is more particle movement.

As thermal energy increases, particle movement does not change.
As thermal energy increases, particle movement does not change.

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, there is less particle movement.
As thermal energy increases, there is less particle movement.

11 answers

The correct statement that describes the relationship between thermal energy and particle movement is:

As thermal energy increases, there is more particle movement.

This is because thermal energy is associated with the kinetic energy of particles; as thermal energy increases, particles move more rapidly.

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 lipids or fat
the presence of lipids or fat

the presence of glucose
the presence of glucose

the presence of starch
the presence of starch

the presence of baking powder

The correct response is:

the presence of starch.

Iodine is commonly used as an indicator for starch; when iodine comes into contact with starch, it will turn a blue-black color.

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

Benedict's test
Benedict's test

brown paper bag test
brown paper bag test

iodine test
iodine test

vinegar test

The correct test that the student could use to provide scientific evidence to support her argument that peas are high in fructose is:

Benedict's test.

Benedict's test is used to detect reducing sugars, such as fructose. If the test indicates the presence of reducing sugars, it would support her argument about the sugar content in peas.

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.

No, it would not hurt because the bricks would have more weight.
No, it would not hurt because the bricks would have more weight.

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 little mass.

The correct response is:

Yes, it would hurt because the bricks would still have the same mass.

On the Moon, the gravitational pull is about 1/6th that of Earth, which means that the weight of the bricks would be less due to lower gravity. However, the mass of the bricks remains the same, and if they were to fall on you, they would still have significant mass. Therefore, being hit by a ton of bricks, regardless of the location, would cause harm.

What measurement is affected by gravity?(1 point)
Responses

weight
weight

density
density

inertia
inertia

mass

The correct response is:

weight.

Weight is the measure of the force of gravity acting on an object and can vary depending on the strength of the gravitational pull (for example, it is less on the Moon than on Earth). In contrast, mass remains constant regardless of the location or 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 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 density will be smaller because the mass remains the same as the volume increases.

The density will be greater because the mass increases but the volume remains the same.

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 per unit volume (density = mass/volume). If you have a larger piece of a material, both the mass and volume will increase proportionally, so the density will remain constant.