Properties of objects!

Matter

What is matter?

Matter is anything that has mass & takes up space.

Can matter be living or nonliving?

Matter can be living or nonliving.

  • Living: matter is found in all life on Earth (makes up cells)
  • Non-living: matter is found in all non living things (water, rocks)

What is matter made of?

Matter is made of atoms.

  • Have protons, neutrons, and electrons.
  • The number of protons and electrons determines the element.

Give two examples of matter.

1. Food

2. animals

Give two non-examples of matter.

1. sunlight

2. soil

Atoms

What is an atom?

Watch what Bill Nye has to say about atoms: Click here

An atom is _________________________________________.

Atoms are the ______________________ of everything.

What determines what a substance is?

Substances are determined by what type of atom they are made of. Also their __________________ affects what they are.

How small are atoms?

Atoms are too small to be seen.

Nearly ____________ atoms can be fit on the end of a _____.

Molecules p. 18-19

What is a molecule?

A molecule is when two or more _______ bond together.

  • They can be the same or different atoms

Different – water (H2O) – hydrogen & oxygen atoms




Same – oxygen (O2) – oxygen bonded with itself



What is the size of a molecule?

The smallest amount of a substance made of combined atoms.

  • More atoms = larger molecule

What determines the makeup of different substances?

The different ________________ of atoms.

The different ________________ of atoms.

Describe the movement of an atom & molecule.

Atoms and molecules are ____________ in motion.

  • More energy means they move more.
  • Liquids and gases move more than solids.

Atoms and Molecules Review

Watch Video 1 and Video 2 then answer:

What is the difference between an atom and a molecule?

Pure or Mixed? p. 21-23

What is a pure substance?

A pure substance only has one type of _______ or _________.

Examples: gold, hydrogen, oxygen

What is an element?

Check this out! WOW!

Click here

Elements are ______ substances with only ______ type of atom.

Periodic Table of the Elements

What is a compound?

A compound has 2+ types of atoms that have been __________

__________________________.

Describe the properties of a compound as it relates to the properties of the atoms used to make that compound.

The properties of a compound are ____________ than original properties of the atoms that were used to make it.

Ex. Table Salt: NaCl (Sodium Chloride)

  • Sodium and Chloride are both very reactive.
  • Table salt is quite stable.

How can a compound be separated?

Only by _______________ the bonds between the atoms.

Properties of Objects

What is mass?

In physics, the property of matter that measures its resistance to acceleration.

It is how much matter is in something.

Measured in kg, g, mg

  • kg = kilogram
  • g = gram
  • mg= milligram

1000g = 1 kg

1000 mg= 1 g

Tool used to measure mass is a triple beam balance.

What is weight?

Check it out.

http://www.exploratorium.edu/ronh/weight/

Amount of downward pull on an object due to gravity.

Measured in newtons(N)

Tool = spring scale

mass does NOT equal weight

increase weight = increase gravitational force on object

Closer to Earth = increase weight

Volume p.11-13

What is volume and how do you measure it?

The amount of ________ an object occupies.

Volume is measured with formulas or displacement.

Formula (of a rectangular prism)

V = L x W x H

How to find volume by formula

  1. Measure the object’s length, width and height.
  2. Use this formula: V = lwh
  3. Multiply the length times the width times the height.
  4. Don’t forget the label. It is always cubed.

Examples: mm3, cm3, m3



Displacement --see p. 13











Units= kl, l, ml, cc

  • _____ = kiloliter
  • _____ = liter
  • _____ = milliliter
  • _____ = cubic centimeter

1cc= 1ml

Tools to use: graduated cylinder, ruler, meter stick

Density p. 43

What is density and how do you calculate it?

Check it out.

Click here

The amount of ________ in a given _________.

Density = mass divided by volume OR mass

volume

Grams per cubic centimeter = g / cc - solids

Grams per milliliter = g / ml - liquids

Label - grams per cubic cm or g/cm3

Practice – What is the density of a metal block that has a mass of 480 grams, a length of 5 cm, a width of 4 cm, and a height of 3 cm? _____________

Objects with a density less than water will _________.

Objects with a density more than water will _________.

Comment Stream