Measurement, Matter, Mixtures and Density Presented by MikeBaldwin

Part I: Mass What has more mass, 3 grams of paper or 3 grams of water?

Write one safety rule for using the following tools and materials: a balance a balance paper paper water water gram weights gram weights

In groups use your balance to determine which has more mass: 3 grams of paper or 3 grams of water In your notebook draw a picture of your results:

Vocabulary Mass Mass balance balance fulcrum fulcrum gram weight gram weight gram gram

Part II: Length How long is the world’s longest snake?

Read the first paragraph of the news article and answer the questions that follow: 1. How long was the snake? 2. What was the mass of the snake? 3. Where was the snake found? 4. What was the name of the tribe who found the snake?

What safety rules would be important to follow in the classroom when measuring large snakes? Write one safety rule in your notebook.

Estimating the length of the snake Everyone should pair up with a partner and line up against one wall of the cafeteria. Everyone should pair up with a partner and line up against one wall of the cafeteria. Your partner should walk until you estimate there is a distance of 14 meters between you. Your partner should walk until you estimate there is a distance of 14 meters between you. Put a post it note at the point of your estimate. Put a post it note at the point of your estimate. Measure the distance and record in your note book. Measure the distance and record in your note book. Subtract the distance from 14 meters to find out how close you were to the correct distance. Subtract the distance from 14 meters to find out how close you were to the correct distance.

Read paragraph 3 and answer the questions that follow: 1. What was the old record for the longest snake? 2. How much longer was the snake found by the Kubu tribe?

In paragraph 4 the snake was measured and found to be only 7 meters long. 1. How much shorter is the snake than the original estimate? 2. How much shorter is this snake than the world record? 3. How would you explain why the estimate was so far off the true measurement?

Vocabulary length length meter meter meter tape meter tape

Part III: Solutions and Matter

How is a bag of marbles like a bag of water?

Using marbles to represent water 1. Add two packages of sugar to the cup with marbles. 2. Shake the cup gently 3. Observe the cup Where did the sugar go? What happens if two package of sugar are added to a cup of water?

What will have more mass: A cup with marbles or a cup with marbles and sugar?

What will happen when two packages of sugar are added to water? What is this mixture called? Why is it a mixture? How can the sugar be separated from the water?

What safety rules should you follow when using the following tools and materials: water sugar graduated cylinder plastic cup What could you do to remind yourself what kind of powder is in a cup with sugar?

How can you determine which cup has pure water and which cup has sugar water without tasting the water? Use the following tools: Balance Graduated cylinder Clear cups

Draw and label a picture in your notebook to show your results.

3 States of matter liquid

States of matter

How is a bag of marbles like a bag of water? Do you think a bag of marbles is a good model for water? Why or why not?

Vocabulary volume volume graduated cylinder graduated cylinder solution solution mixture mixture milliliter milliliter liquid liquid solid solid gas gas

Part IV: Density What will happen if oil and water are mixed?

Review of units and tools of measurement Unit Picture of tool Name of tool Length Mass Volume Temperature

Draw a picture of what happened when the oil and water were mixed.

What has more mass: 50 ml of water or 50 ml of oil?

Write a safety rule for using the following tools and materials: Oil Oil Water Water Plastic cups Plastic cups Balance Balance Paper towels Paper towels Graduated cylinder Graduated cylinder

Use the tools below to determine which has more mass 50 ml of water or 50 ml of oil? 2 graduated cylinders 2 graduated cylinders 2 plastic cups 2 plastic cups Vegetable oil Vegetable oil Water Water Balance Balance Draw a picture and label your results in your notebook.

Density Write more or less in the blanks: When a substance has the same volume but less mass it is _____ dense. When a substance is the same volume but has more mass it is ____dense.

Density: A measure of how heavy a solid, liquid, or gas is for its size. Density is expressed in mass per unit volume, that is, grams per cubic centimeter. The density of water is 1 gram per cubic centimeter.

Vocabulary Graduated cylinder Graduated cylinder Balance Balance Volume Volume Mass Mass Length Length Temperature Temperature Celsius Celsius Gram Gram milliliter milliliter Density Density

Read the article on the Dead Sea. Is the water in the Dead Sea more or less dense that pure water? Explain why the density of the Dead Sea is different than other oceans. What happens to animals that get into the Dead Sea?