Question

A beaker contains a mixture of sand and salt. A student adds water to dissolve the salt. Which processes can be used to separate out the sand and the salt?(1 point) Responses distillation to collect both the sand and the salt distillation to collect both the sand and the salt filtration to collect both the sand and the salt filtration to collect both the sand and the salt filtration to collect the sand and distillation to collect the salt filtration to collect the sand and distillation to collect the salt distillation to collect the sand and filtration to collect the sa

Answer 1

To separate a mixture of sand and salt after adding water to dissolve the salt, the correct processes are:

1. Filtration: This process is used to separate the solid sand from the liquid solution of salt water. The sand will remain on the filter paper, while the salt water will pass through.

2. Distillation: This process can then be used to separate the dissolved salt from the salt water. By heating the solution, water can be evaporated and then condensed back into a liquid, leaving the salt behind.

So, the best response would be: Filtration to collect the sand and distillation to collect the salt.

Answer 2

What phase does water go through if you use distillation to separate it from dissolved sugar?(1 point) Responses from a solid to a liquid, and then to a gas from a solid to a liquid, and then to a gas 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 back to a liquid from a liquid to a solid, and back to a liquid from a liquid to a gas, and back to a liquid

Answer 3

When using distillation to separate water from dissolved sugar, water goes through the following phase changes:

1. From a liquid to a gas: When the water is heated, it evaporates and turns into steam (gas).

2. Back to a liquid: The steam is then condensed back into liquid water through cooling.

Therefore, the correct response is: from a liquid to a gas, and back to a liquid.

However, if such an option isn't listed in your responses, it appears that none of the provided options are entirely accurate for the specific process described. Please double-check the options given.

Answer 4

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 made from natural resources. It is a natural material made 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.

Answer 5

The correct statement that describes plastic is: It is a synthetic material that comes from natural resources.

Plastics are typically made from polymers derived from petrochemicals, which are obtained from natural resources like crude oil and natural gas, making them synthetic materials that originate from natural sources.

Answer 6

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. People might think it is fine to waste a lot of the materials since they just came from a lab. People might think it is fine to waste a lot of the materials since they just came from a lab. Anything made in a lab requires natural resources to produce it. Anything made in a lab requires natural resources to produce it. There are not enough synthetic resources yet to make what people need. There are not enough synthetic resources yet to make what people need. Skip to navigation

Answer 7

The main problem with the idea that making everything in labs would save natural resources is: Anything made in a lab requires natural resources to produce it.

Even synthetic materials created in laboratories often rely on natural resources for their components, so the depletion of natural resources would still be a concern.

Answer 8

Which discovery would have the greatest impact on reducing the negative consequences of plastic?(1 point) Responses the discover of new sources for the raw materials of plastic the discover of new sources for the raw materials of plastic the discovery of more ways to reuse plastic the discovery of more ways to reuse plastic the discovery of more ways to incorporate plastic in everyday goods the discovery of more ways to incorporate plastic in everyday goods the discovery of a new bacteria that consumes plastic waste