Koontz 5th - Math and Science

Students should be able to...

Know the weight of an object is equal to the sum of its parts in a closed system (conservation of mass).
Use qualitative and quantitative data to compare properties of materials before and after a change.
Understand a new material is formed after a chemical change.
Understand physical change.

Resources

Vocabulary

matter: anything that has mass and takes up space. EVERYTHING is made of matter – even air!

mass: the amount of matter in an object (mass never changes, even on the moon!)

conservation of mass: the mass of an object will stay the same, even if it is broken into smaller pieces or if it warmed up

For example: a cookie broken into smaller pieces will have the same mass as the whole cookie *THINK ABOUT IT: If a blown up balloon gets warmed up and begins to expand even more, has the mass actually changed?*

weight: the force of gravity on an object (will change on the moon!)

volume: the amount of space an object or substance takes up

density: a measure of how many particles are packed together into a certain amount of space

physical change: a change in matter that DOES NOT affect its chemical composition (NO new substance is formed!!) For example: cutting paper, melting an ice cube, water evaporating

chemical change: a process that changes substances into NEW substances. Remember, after a chemical change occurs, the substance can NEVER be changed back into what it started as! For example: baking a cake, lighting a match, a nail rusting

solution: a combination of substances that cannot be easily separated For example: lemonade, kool-aid

mixture: a combination of substances that can be physically separated For example: chex mix, salad