Please help me this is science lesson 7.1 describing forces please i dont understand this Multiple Choice Bubble the correct answer.
Use the table below to answer questions 1 and 2.
Size of
Force (in
newtons)
Direction of
Force
Q
200 N
to the left
R
200 N
to the left
S
250 N
to the left
T
250 N
to the right
U
275 N
to the right
1. In the table, which two forces are balanced?
SC.6.P.13.1
A Q and R
B Rand S
C S and T
T and U
D

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.