Table of Contents
- 1 How do you determine if something is alive or not?
- 2 How can you determine an unknown substance?
- 3 What is the best unit when trying to identify an unknown substance?
- 4 How can you distinguish a substance from a mixture?
- 5 Was living but is now dead examples?
- 6 How can you tell if something is alive or dead?
- 7 What is the status of being alive or deceased?
- 8 How are X-rays used to identify unknown substances?
How do you determine if something is alive or not?
A living thing displays the following characteristics:
- It is made of cells.
- It can move.
- It uses energy.
- It grows and develops.
- It can reproduce.
- It responds to stimuli.
- It adapts to surroundings.
How can you determine an unknown substance?
Scientists already have determined the densities of many substances. As a result, you can conveniently compare the density of an unknown substance with the densities of known substances. Finding any matching densities will give you information about the possible identity of the unknown substance.
Which which one is the best way to determine whether an unknown sample is a substance or a mixture?
Answer: C. observing its physical appearance.
What is the best unit when trying to identify an unknown substance?
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume.
How can you distinguish a substance from a mixture?
Pure substances and mixtures
- a pure substance consists only of one element or one compound.
- a mixture consists of two or more different substances, not chemically joined together.
Which characteristic properties would you use to identify this unknown substance?
Determination of chemical properties results in the change of the identity of the substance. Some properties, such as solubility, melting point, boiling point, and density are independent of the amount of substance being examined. These properties are known as intensive properties and are used to identify a substance.
Was living but is now dead examples?
The examples of some substances which were once living and now are dead are: 1. Chair, table made up of wood.
How can you tell if something is alive or dead?
Let me ask you something. At the end of this, you will be able to tell someone, whether something is alive or not by using the 9 characteristics of living things. Living things require water and a source of food/energy. All living things have limited lifespans. Dead organisms are food for live ones. Now you are ready.
How do you determine if something is living or nonliving?
You can determine if something is living or nonliving by these simple things: 1. They have to be able to reproduce, either asexually or sexually. 2. They have to be able to respond to stimuli.
What is the status of being alive or deceased?
However, if they must literally enter alive or deceased in a free-form field, I think the clearest way to indicate that is to label the field Alive or Deceased? It is called living status or preferably vital status, as the former phrase has been used in wider contexts.
How are X-rays used to identify unknown substances?
Basically, the X-rays will diffract into various patterns depending on the structure of the sample, and with the use of high-powered computers you can figure out exactly what it is you’re looking at. It’s usually not used to identify an unknown substance, but to figure out the long-range structures of known materials.