1. Solving Equations! Use these 3 steps when solving ALL equations in here!

2. Let’s use an example equation: What is the density of an object if its mass is 10 grams and its volume is 5 cubic centimeters? What is the density of an object if its mass is 10 grams and its volume is 5 cubic centimeters? What should we do to solve this? What should we do to solve this? WHEN SOLVING EQUATIONS IN EARTH SCIENCE, THERE ARE 3 STEPS THAT YOU MUST FOLLOW!! WHEN SOLVING EQUATIONS IN EARTH SCIENCE, THERE ARE 3 STEPS THAT YOU MUST FOLLOW!! Let’s try it! Let’s try it!

3. STEP 1! Write the equation! EXAMPLE: What is the density of an object if its mass is 10 grams (g) and its volume is 5 cubic centimeters (cc)? EXAMPLE: What is the density of an object if its mass is 10 grams (g) and its volume is 5 cubic centimeters (cc)? In this case, we need the DENSITY formula Find the equation on the 1 st page of your ESRT Density = mass/volume D = m/v

4. STEP 2: Substitute in your numbers!! EXAMPLE: What is the density of an object if its mass is 10 grams and its volume is 5 cc? EXAMPLE: What is the density of an object if its mass is 10 grams and its volume is 5 cc? Now we plug in numbers from the equation D = m/v (from step1) D = 10g/5cc Whew! OK, ready for the last step?

5. STEP 3: Solve the Equation! EXAMPLE: What is the density of an object if its mass is 10g and its volume is 5cc? EXAMPLE: What is the density of an object if its mass is 10g and its volume is 5cc? NO NAKED NUMBERS!! Always include units. Also, circle your final answer D = m/v (from step1) D = 10g/5cc (from Step 2) What’s 10g/5cc You got it – 2, but 2 what? Yes, 2 g/cc