What is matter Lets revisit this idea Theory

What is matter Let’s revisit this idea!

Theory of Conservation of Matter: Matter cannot be created or destroyed!

What is matter? Matter is anything that has mass _______ and volume (takes up space).

Matter has mass and volume Mass is the amount of matter in _____ an object.

Matter has mass and volume Volume is the amount of space _______ an object takes up.

How is mass different from weight? �The words mass and weight are often used as though they mean the same thing, BUT THEY DO NOT! �Weight = the measure of gravitational pull on an object An object’s weight can change depending on its location. If the gravitational pull on the moon is different, your weight on the moon will be different! �Mass = mass tells you the amount of matter an object has Your mass would not change on the moon. You are made up of the same amount of atoms no matter where you are!

How much do I weight on the moon? �Miss Lamb, due to the wonderful nature of gravity, would only weigh 27. 28 lbs. on the moon! Woo hoo! Talk about an instant diet �Miss Lamb would, however, contain the same mass. None of the atoms that make up my body would have been destroyed in the process of traveling to the moon. I would maintain my mass and shape. Okay – So I may be happy that my mass didn’t change and I didn’t lose anything necessary for living like an organ, but I wouldn’t mind if my shape changed a bit ; )

A dog would have the same mass on the moon! The dog is made up of the same number of atoms that all contain their same atomic masses! Since mass is the amount of matter in an object, the mass of the dog stays the same. He did not lose any matter on the journey to the moon.

Weight…on the other hand… Weight: a measure of the pull of gravity on an object’s mass. Because of gravity, weight is NOT the same everywhere in the universe. (on the moon you would weigh less than Earth).

Let’s Explore This Idea Further… �Using the triple beam balance, we will measure the mass of 5 small objects. Watch carefully as the teacher demonstrates how to use this measuring device. �Then, you will follow the steps one by one as the teacher completes them. We will share our results together and make sure that everyone is correctly calculating the mass. �Please follow all of teacher’s instructions for using this balance. This equipment is expensive to replace!

The triple beam balance Ø Ø Ø Ø Ø Move all three sliders so that they read ‘zero’. Make sure that there is nothing on the pan and that it is clean. Check to see if the balance reads zero. Your balance isn’t reading zero so you need to turn the thumbscrew to adjust the balance until it reads zero Your balance is ready to measure. Place object to be weighed on the pan. Make sure that no part of the object is supported by the table. Move the sliders, beginning with the largest. When moving a slider causes the balance to tip, move the slider back to the previous position. Move the next slider until it tips the balance. Place is in the previous position. Move the final slider until the balance reads zero. Read each of the sliders and add their weights together. The unit should be recorded in grams.

What is the mass of… �The black metal block? �The marbles? �The plastic blocks? �The pennies? �The pencil?

Let’s Explore This Idea Further… �Now, using spring scales, we will measure the weight of 5 same small objects. Watch carefully as the teacher demonstrates how to use this measuring device. �Then, you will follow the steps one by one as the teacher completes them. We will share our results together and make sure that everyone is correctly calculating the mass. �Please follow all of teacher’s instructions for using this measuring tool. The equipment is difficult to replace!

The Spring Scale �Always zero out the scale �Always use the scale right side up �Carefully place the items in the bag or directly on the hook of the scale �Read the top of the indicator �Each little line represents 20 grams or 1 N of force

What is the weight of… �The black metal block? �The marbles? �The plastic blocks? �The pennies? �The pencil?

Are mass and weight the same thing? We will now complete a side by side comparison. Mass vs Weight [in grams] 1. 2 1 0. 8 0. 6 0. 4 0. 2 0 metal block These #s will need to change. Any ideas on how to set this up? marbles plastic blocks mass weight pennies pencil

Drawing Conclusions �Write a sentence that describes the relationship between weight and mass. �The objects were not moving when you measured their weights. What was balancing the force of gravity pulling them downward? �When would the mass and weight of an object be different?

I know that matter takes up space, but what is volume and how do I measure it? �Volume is the amount of space an object takes up -A balloon and a bowling ball can have the same volume, how can this be? -Do they have the same mass?

How do we calculate volume? Well defined shapes are easy to calculate: Volume = length x width x height

How do we calculate volume? � Irregular shapes are more difficult to calculate. � In this case, displacement can be used to measure the volume of an object � Displacement works because no 2 objects can occupy the same space at the same time. If you drop a rock into a graduated cylinder, it will displace, or move, the water. You can measure the differences in the water level to determine the volume of the object.