Chemistry in our lives

Write each of the following in scientific notation:$\left(1.5\right)$

a. $0.0042$ 

b. $310$

C. $890 000 000$

d. $0.000 000 056$

Identify each of the following as an observation, a hypothesis, an experiment, or a conclusion: $\left(1.2\right)$

a. Every spring, you have congestion and a runny nose.

b. An overweight patient decides to exercise more to lose weight

c. Many research studies have linked obesity to heart disease. 

Classify each of the following as an observation, a hypothesis, 

an experiment, or a conclusion: $(1.2)$

a. The bicycle tire is flat. 

b. If I add air to the bicycle tire, it will expand to the proper size. 

c. When I added air to the bicycle tire, it was still flat. 

d. The bicycle tire has a leak in it. 

Classify each of the following as an observation, a hypothesis, 

an experiment, or a conclusion: $(1.2)$

a. A big log in the fire does not burn well. 

b. If I chop the log into smaller wood pieces, it will burn better. 

c. The small wood pieces burn brighter and make a hotter fire. 

d. The small wood pieces are used up faster than burning the big log.

Solve each of the following for x: $(1.4)$

a. $2x+5=41$

b. $\frac{5x}{3}=40$

Solve each of the following for z: $(1.4)$

a. $3z-\left(-6\right)=12$

b. $\frac{4z}{-12}=-8$

a. What does the title indicate about the graph? $(1.4)$

b. What is measured on the vertical axis? 

c. What is the range of values on the vertical axis? 

d. Does the solubility of carbon dioxide increase or decrease with an increase in temperature?