Unit 7 - Calculate Derived Units

Slides:

Advertisements

Similar presentations

Making Measurements in Science

Advertisements

830 Apply an equation to determine the density of an object based on its mass and volume.

When you get a question right, click a shell to reveal your score.

Measurement Measurement  SI Standard System of International Units or Metric System  Uses 10 as a base  Always estimate one unit/place further than.

A Look at Density and How to Calculate It.

How to Calculate Density

Measurement Ch.1.

Tools for Measuring some Physical Properties of Matter Fill in your vocabulary map with the following information!

I. MEASUREMENTS A. ALL MEASUREMENTS MUST HAVE TWO PARTS 1. A NUMBER

Measuring Matter Chemistry is the study of matter and all its changes.

Volume (square objects, like a box) Volume is the: amount of space something takes up. FACTS ABOUT VOLUME MEASURMENTS: Volume is found by multiplying three.

The Metric System A way of measuring based on multiples of 10.

Class Notes 3: The Metric System Always use the Metric System in science!

Measurement The International System of Units (SI) is the standard system used around the world.

Density Density describes how heavy an object is compared to its size.

Length What is it? Distance from one point to another Unit(s) of measurement Meter (m) - basic unit cm smaller things mm km - bigger things Tools Metric.

Volume, Mass, and Density Matter is anything that has mass and takes up space. Mass is a measure of how much matter is in an object. Mass can be expressed.

Density. Different substances have different densities. The density of a material does not depend on the size or amount of the substance you have. Density.

Measurements. The Metric System OH NO! The Metric System! OH NO! The Metric System! People visiting other countries from the US seem to be scared to death.

Measurement Quiz Review. What is the term for the amount of space an object occupies? VOLUME.

Measurement Review Stuff you should know…. Measurement Important to measure accurately: –Communicate information –Reliable results –Real Life!

Topic: Chemistry Aim: Describe the difference between elements and compounds. Do Now: Bottom of Atoms reading notes HW: Ditto - Measuring Mass and Volume.

Metrics and Measurement kilohecto deca BASE UNITdecicentimilli (K) (h) (da) meter (m) (d) (cm) (mm) gram (g) liter (L) 1 *Hint: 1.

Measurement in Metrics AC Science. Metric System Systems Internationale Systems Internationale AKA “SI” AKA “SI” Based on factors of 10 Based on factors.

Density is defined as mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object. Density is the amount of.

Each group should complete the following on the paper provided Look at the instruments on your table. For each one, write down: 1. What you think the name.

Mass, Temperature and Density Review. What is the definition of volume? The amount of space an object takes up. What is the name of the instrument used.

MEASUREMENT NOTES  Graduated cylinder measures VOLUME  Volume is how much space an object takes up  Volume is measured in milliliters (mL)

Measurement Chapter 2. Units in Lab In lab we cannot always measure in SI units. In lab we cannot always measure in SI units.Mass Grams (g) Volume Milliliters.

Mrs. Howland Chemistry 10 rev Which has greater mass? 100 kg of lead or 100 kg of feathers?

Unit 7 - Calculate Derived Units Students will learn to differentiate between base units and derived units. In addition, students will be able to perform.

Volume, Mass, and Weight…OH MY !. MATTER: Anything that has mass and takes up space.

Matter has mass and volume.. Describe what matter is and demonstrate how to measure mass.

Density Most Dense Less Dense Least Dense.

Measurement “The most remarkable discovery ever made by a scientists was science itself.” Jacob Bronowski.

Measure for Measure Chapter 1 Sec 3

Notes: Measurement.

Length, Mass, Volume, Density, Temperature, and Time

Mass – How much matter is in an object

Lesson Objective: You will be able to use mass and volume to calculate the density of an object.

Review, YAY REVIEW!!!!.

Do Now Skim through lesson 1.1 and write down 2 new facts that you want to learn more about.

MATTER VOCABULARY WATCH, READ, LEARN.

Notes on Making Measurements

Measurement & Calculation

International System (SI) of Measurement

Name That Tool Q. What is the name of this measurement tool? A. triple beam balance.

Properties of Matter.

International System (SI)

Measuring Notes ｷThe units used for mass are grams (g).

Measurement: Tools and Units

Lesson Objective: You will be able to use mass and volume to calculate the density of an object.

Metric Measurement.

Measurements & Measurement Tools

Wednesday, September 21 7th Grade Warm-up:

Measurement: Tools and Units

#4 Notes : METRIC AND MEASUREMENTS/ Basic Math Tools

Tools, Measurement, and Safety

Aim: How can I calculate density of an irregular object

Scientific Measurements

Standards for Measurement

Class Notes 1.2: The Metric System

Metric Notes Chapter 1.

A closer look at the physical property of Density

Density What is density?.

Presentation transcript:

Unit 7 - Calculate Derived Units Students will learn to differentiate between base units and derived units. In addition, students will be able to perform mathematical operations to determine the density of an object.

Basic units Measure distance in METERS (m, cm, km). Measure volume (most of the time) in LITERS. Measure time in SECONDS (s, ms). Measure mass in GRAMS (mg, g, kg). In this class, we will consider a unit “BASIC” if we can measure it directly with one of our available instruments like a ruler or stopwatch.

Mass & Volume #1. Composed of atoms (has mass) In chemistry, two rule are true for all matter: #1. Composed of atoms (has mass) #2. Takes up space (has volume) In your notes, take a second to describe what MASS and VOLUME mean in your own words.

Derived units In the lab, some measurements cannot be obtained directly. Instruments that can measure these values may be too expensive or impractical to use. Therefore, we're going to have to learn how to figure these things out ourselves...

Derived units Derived units are found by MULTIPLYING and/or DIVIDING basic units together. In other words, you have to solve a math problem to figure them out. Ex: cm x cm x cm = cm3 (volume of a solid) Ex: m ÷ s = m/s (speed)

Checkpoint Which of these things is a DERIVED UNIT? a. Temperature in degrees Celsius (°C) b. Distance traveled in meters (m) c. Square footage of a house (ft2)

Derived Measurement: Density There's only one thing I want you to learn how to derive today. Its called DENSITY. “The ratio of an object's mass to its volume” - that's what the textbook says density means.

Figuring out density Step #1: Determine the object's mass using a scale or triple-beam balance. Mass is measured in GRAMS. Step #2: Determine the volume using a graduated cylinder or by doing L x W x H. Volume is measured in MILLILITERS or CM3. Step #3: Compare the object's mass to how much space its taking up using DIVISION. This tells you the density.

Example problems Lets do these problems together in your notes... DON'T FORGET ABOUT SIGNIFICANT FIGURES!! Recycled aluminum cans are smashed into cubes that are 10.cm3 with a mass of 27g. What is the density? What is the density of approximately 50mL of water with a mass of 49.2 grams?

Checkpoint The mass of a metal block is 120. grams. The size of the block is 6.00 cm3. What is the density of the metal block? a. 20 g b. 20.0 cm3 c. 20 g/cm3 d. 20.0 g/cm3