U-Science-Gr8-Unit2-PBT-CBT (2020-21) Question: 1-10
Different arrangements of atoms are shown in the figure below.
8
Key
. - hydrogen
O = oxygen
O carbon
8
Figure 1
Figure 3
808
ag
808
OS SO
ag
cs
os
808 308
80
808
as
80
Figure 2
Figure 4
Which figure represents a mixture?
Figure 1
Figure 2
Figure 3
Figure 4

Figure 3

Explanation:

A mixture is a substance made up of two or more different kind of atoms arranged in such a way that they are not chemically linked or joined. This accounts for the reason a mixture can be separated easily. In the figures attached as an image in this question:

- Figure 1 represents an element because it is made up of only hydrogen atoms chemically bonded together to form a molecule.

- Figure 2 represents a compound because it contains hydrogen and carbon atoms chemically joined together.

- Figure 3 represents a MIXTURE because it contains the oxygen and carbon atoms, which are not chemically joined to one another. As seen in the image, the oxygen atoms are not joined to the carbon atoms.

- Figure 4 represents a compound because it contains oxygen and hydrogen atoms chemically bonded together.

because the light is a great source of energy for the plants to survive. (i hope this )

1. the energy lost to disorder metabolism     -entropy

2. related to or possessing motion potential     -kinetic

3. all of the chemical reactions in an organism required for maintenance of the processes of life entropy     -metabolism

4. possible; ability to go into action or perform work kinetic     -potential

5. the study of energy and its transformations thermodynamics     -thermodynamics