LDA 2: Science Review

By Chris, Josh, and Miguel


elements are atom(s) of a pure substance that cannot be broken down any further.

Even if an element has more than 1 atom, it still can be an element.

Example: Fe (Iron)

Fe5 (Iron)

Four Major Parts Of Earth

The first layer of Earth is Crust, the first layer, Mantel is the next, then Outer Core, and finally the Inner Core.

6th Grade ones are: atmosphere lithosphere hydrosphere biosphere

Crust definition:

The earth's atmosphere is a thin layer surrounding around a planet. Each planet has a different atmosphere.

The gases make most of the earth's atmosphere: Nitrogen (N), which is 78% of our atmosphere, and oxygen (O), which is 21%. Various amounts of other gases make the rest of it.

Based on the temperature, the atmosphere has four layers: the troposphere, stratosphere, mesosphere, and thermosphere.

Energy is moved between the earth's surface and its' atmosphere via conduction, convection, and radiation.

Ocean currents have a great role in moving this heat North and South. Currents, such as a northward flowing Stream, transport great amounts of heat toward the poles (North Pole and South Pole) and contribute to the development of lots of types of weather phenomena.

Found on https://www.ucar.edu/learn/1_1_1.htm

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an atom is an element that makes everything and is a basic unit of measurement.

Exact definition: The basic unit of a chemical element.

Found from http://www.bing.com/search?q=atom+definition&form=IE11TR&src=IE11TR&pc=DCJB

Element and compound Differance

The difference between an element and compound is an element contains one type of atom and the compound contains 2 or more types of atoms.

For more information, please click this link: http://www.differencebetween.net/science/difference-between-an-element-and-a-compound/


Element= O2

compound= O2Na15

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a molecule is multiple atoms mixed with each other, making the smallest unit of a chimecal compound, which may cause a chemical reaction.





noun: molecule; plural noun: molecules

a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

Found from https://www.google.com/#q=molecule+definition

Chemical formula

The chemical formula is: H2SN4OFeAr6.

This has 16 atoms and 6 elements

4 Main Chemical Changes

Color Change: The item you are using has changed color and you can see it with your bare eyes.

Temp. Change: You can feel or watch a thermometer as the temp. rises or lowers.

Production of a solid precipitate: If you look closely you will see snow-like bubbles rising to the surface.

Production of gas: (The Experiment we did) When you release the baking soda, the balloon will get blown up and the bottle of water will get super foamy.