# DENSITY, MASS, AND VOLUME Tuesday, September 2 nd, 2014.

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DENSITY, MASS, AND VOLUME Tuesday, September 2 nd, 2014

Warm-up quiz ◦Circle the best answer ◦For question 2, I.V. is an abbreviation for independent variable D.V. is an abbreviation for dependent variable

Question 1 ◦What is the correct order of the scientific method? a. hypothesis, observation, controlled experiment, conclusion b. observations, hypothesis, controlled experiment, conclusion c. question, hypothesis, experiment, observation, conclusion d. question, observation, hypothesis, controlled experiment, conclusion

Question 2 ◦Jamar, Jocelyn, and Vanessa were discussing which gum brand flavor lasted the longest. They went to the store and bought three different brands of gum, all the same mint flavored, then each chewed a piece of each brand and recorded how much time went by before the gum lost flavor. What were the independent (I.V.) and dependent (D.V) variables? a. I.V. = gum flavor, D.V.= time flavor lasted b. I.V. = time flavor lasted, D.V.= gum flavor c. I.V. = time flavor lasted, D.V.= gum brand d. I.V. = gum brand, D.V. = time flavor lasted

Question 3 ◦The data that Jamar, Joceyln, and Vanessa collected were the times that gum flavor lasted. What type of data is this? a. Qualitative b. Quantitative c. Numerical d. Both ‘b’ and ‘c’

Announcements!!! ◦Today’s homework is: filling out your study guide ◦Your first exam is on Thursday, September 4 th ◦The exam will cover the scientific method as well as density, mass, and volume

Daily Goals: ◦ SWBAT state the formula of density ◦ SWBAT manipulate the density formula to calculate for missing values during a class-wide lab activity Key Term: Density Big Goal ◦ All students will achieve 85% mastery of 100% of the Earth & Environmental Science objectives ◦ Students will become well-rounded and active members of the community ◦ Students will become excellent and effective communicators ◦ Students will acquire the traits necessary to excel academically in a collegiate environment

DEMO ◦ Diet Coke vs. Regular Coke ◦ Will it sink or will it float? Will it sink or will it float ◦ FIRST: Create a hypothesis about what will happen when coke and diet coke are dropped into a beaker of water. Explain why.  Put this hypothesis right after your warm-up

Mass ◦A measurement on the amount of matter in an object African bush elephant weight an average of 5,500 kg, which is about 12,100 pounds Average human weighs about 62 kg or 37 pounds, about 88 times less than an elephant

Mass ◦A measurement on the amount of matter in an object ◦Units include, but not limited to: grams (g), kilograms (kg), milligrams (mg)pounds

Volume ◦The amount of space inside an object Example: Each egg has a certain volume, or amount of space in it, that can hold a certain amount of egg yolk

Volume ◦The amount of space inside an object ◦Units include, but not limited to: milliliters (ml), liters (l), cm 3

Density ◦ Density: mass divided by volumeMassVolume ◦ The amount of mass in a certain amount of space ◦ Unit : g/mL

◦ Less dense objects will float and more dense objects will sink. ◦ Water has a density of 1 g/mL ◦ A density greater than 1g/ml will sink in water ◦ A density less than 1 g/mL will float in water ◦ COLLEGE CHALLENGE QUESTION: Which layer of liquid to the right as the greatest density?

Which block has a greater density?

Let’s think back to the Coke and Diet Coke! ◦ Why did one sink and one float? ◦ Mass of Coke:Mass of Diet Coke: ◦ Volume of Coke:Volume of Diet Coke: ◦ Density of Coke:Density of Diet Coke:

Exit Ticket Time! Any questions before we begin?

Exit Ticket 1.What is the formula for density? 2.An object has a mass of 5 g and a volume of 100 mL. What is the object’s density? 3.A scientist has two liquids, number 1 and 2. The density of liquid 1 is 0.85 g/mL and the density of liquid 2 is 1.2 g/mL. Describe or draw a picture to show what would happen if liquid 2 was poured into a container with liquid 1.

Announcements!!! ◦Today’s homework is: filling out your study guide ◦Your first exam is on Thursday, September 4 th ◦The exam will cover the scientific method as well as density, mass, and volume