Which statement correctly describes the relationship between thermal energy and particle movement?(1 point)
Responses
As thermal energy increases, particle movement does not change.
As thermal energy increases, particle movement does not change.
As thermal energy increases, there is less particle movement.
As thermal energy increases, there is less 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, there is more particle movement
23 answers
As thermal energy increases, there is more particle movement
scientist adds iodine as an indicator to an unknown substance. What will this indicator reveal about the substance?(1 point)
Responses
the presence of baking powder
the presence of baking powder
the presence of lipids or fat
the presence of lipids or fat
the presence of glucose
the presence of glucose
the presence of starch
Responses
the presence of baking powder
the presence of baking powder
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
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
Benedict’s test
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
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have little 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.
Yes, it would hurt because the bricks would still have the same mass.
Responses
No, it would not hurt because the bricks would have little mass.
No, it would not hurt because the bricks would have little 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.
Yes, it would hurt because the bricks would still have the same mass.
No, it would not hurt because the bricks would have little mass.
Which measurement is affected by gravity?(1 point)
Responses
mass
mass
inertia
inertia
weight
weight
density
Responses
mass
mass
inertia
inertia
weight
weight
density
Weight
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 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 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.
Responses
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 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 be smaller because the mass remains the same as the volume increases.
Which phases does water go through if you use distillation to separate it from dissolved sugar?(1 point)
Responses
from a liquid to a gas, and back to a liquid
from a liquid to a gas, and back to a liquid
from a liquid to a solid, and back to a liquid
from a liquid to a solid, and back to a liquid
from a solid to a liquid, and then to a gas
from a solid to a liquid, and then to a gas
from a liquid to a solid, and then to a gas
Responses
from a liquid to a gas, and back to a liquid
from a liquid to a gas, and back to a liquid
from a liquid to a solid, and back to a liquid
from a liquid to a solid, and back to a liquid
from a solid to a liquid, and then to a gas
from a solid to a liquid, and then to a gas
from a liquid to a solid, and then to a gas
from a liquid to a gas, and back to a liquid
Which statement is a good description of plastic?(1 point)
Responses
It is a synthetic material that does not come from natural resources.
It is a synthetic material that does not come from natural resources.
It is a synthetic material that comes from natural resources.
It is a synthetic material that comes from natural resources.
It is a natural material that is made from synthetic resources.
It is a natural material that is made from synthetic resources.
It is a natural material made from natural resources.
Responses
It is a synthetic material that does not come from natural resources.
It is a synthetic material that does not come from natural resources.
It is a synthetic material that comes from natural resources.
It is a synthetic material that comes from natural resources.
It is a natural material that is made from synthetic resources.
It is a natural material that is made from synthetic resources.
It is a natural material made from natural resources.
It is a synthetic material that does not come from natural resources.
A student states that natural resources could be saved if people made everything they need in labs. What is the main problem with this idea?(1 point)
Responses
The materials made in labs will still pollute the environment and destroy natural resources.
The materials made in labs will still pollute the environment and destroy natural resources.
There are not enough synthetic resources yet to make what people need.
There are not enough synthetic resources yet to make what people need.
Anything made in the lab requires natural resources to produce it.
Anything made in the lab requires natural resources to produce it.
People might think it is fine to waste a lot of the materials since they just came from a lab.
Responses
The materials made in labs will still pollute the environment and destroy natural resources.
The materials made in labs will still pollute the environment and destroy natural resources.
There are not enough synthetic resources yet to make what people need.
There are not enough synthetic resources yet to make what people need.
Anything made in the lab requires natural resources to produce it.
Anything made in the lab requires natural resources to produce it.
People might think it is fine to waste a lot of the materials since they just came from a lab.
Anything made in the lab requires natural resources to produce it.
What is the Great Pacific Garbage Patch?(1 point)
Responses
a place on the Pacific Coast where plastic waste from the ocean has collected on beaches
a place on the Pacific Coast where plastic waste from the ocean has collected on beaches
a place on the Pacific Coast with a large plastic recycling facility
a place on the Pacific Coast with a large plastic recycling facility
a place where people who live near the Pacific Ocean have collected plastic in one place
a place where people who live near the Pacific Ocean have collected plastic in one place
a place where plastic and other waste has collected in the Pacific Ocean
Responses
a place on the Pacific Coast where plastic waste from the ocean has collected on beaches
a place on the Pacific Coast where plastic waste from the ocean has collected on beaches
a place on the Pacific Coast with a large plastic recycling facility
a place on the Pacific Coast with a large plastic recycling facility
a place where people who live near the Pacific Ocean have collected plastic in one place
a place where people who live near the Pacific Ocean have collected plastic in one place
a place where plastic and other waste has collected in the Pacific Ocean
a place where plastic and other waste has collected in the Pacific Ocean
In one to two sentences, explain a similarity and a difference between the particles in liquid water at 100ºC and the particles in steam at 100ºC.(2 points)
A similarity between the particles in liquid water at 100ºC and steam at 100ºC is that they both consist of water molecules. A difference is that the particles in liquid water are closely packed and move freely, while the particles in steam are dispersed and have greater kinetic energy.
You overhear a friend saying, “Plastic is the worst thing that humans have ever invented.”
In four to five sentences, explain whether you agree or disagree with your friend’s statement. Be sure to include facts that show the range of impacts that plastic has on human society and the environment.
(4 points)
In four to five sentences, explain whether you agree or disagree with your friend’s statement. Be sure to include facts that show the range of impacts that plastic has on human society and the environment.
(4 points)
I agree with my friend's statement that plastic is one of the worst things that humans have ever invented. Plastic has widespread and significant negative impacts on both human society and the environment. On one hand, plastic pollution poses a severe threat to marine life and ecosystems. It takes hundreds of years to decompose, leading to the formation of massive garbage patches, such as the Great Pacific Garbage Patch, and causing harm to marine animals through ingestion and entanglement.
On the other hand, plastic production and disposal contribute to greenhouse gas emissions and climate change. The extraction and processing of fossil fuels required for plastic contribute to carbon emissions, and when plastic is incinerated or sent to landfills, it releases harmful chemicals and gases into the atmosphere. Additionally, plastic waste management is a significant challenge. Much of the plastic waste ends up in landfills or is inadequately recycled, leading to pollution of soil and water sources.
Furthermore, the health risks associated with plastic use cannot be ignored. Many plastics contain hazardous chemicals, such as phthalates and bisphenol A (BPA), which can leach into food and beverages, posing potential risks to human health, including endocrine disruption and developmental issues.
Considering all these adverse impacts, it is clear that plastic has had profoundly negative consequences for both human society and the environment. Urgent actions are needed to reduce plastic consumption, promote sustainable alternatives, and improve waste management practices to mitigate these harmful effects.
On the other hand, plastic production and disposal contribute to greenhouse gas emissions and climate change. The extraction and processing of fossil fuels required for plastic contribute to carbon emissions, and when plastic is incinerated or sent to landfills, it releases harmful chemicals and gases into the atmosphere. Additionally, plastic waste management is a significant challenge. Much of the plastic waste ends up in landfills or is inadequately recycled, leading to pollution of soil and water sources.
Furthermore, the health risks associated with plastic use cannot be ignored. Many plastics contain hazardous chemicals, such as phthalates and bisphenol A (BPA), which can leach into food and beverages, posing potential risks to human health, including endocrine disruption and developmental issues.
Considering all these adverse impacts, it is clear that plastic has had profoundly negative consequences for both human society and the environment. Urgent actions are needed to reduce plastic consumption, promote sustainable alternatives, and improve waste management practices to mitigate these harmful effects.
29 answers