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Warm UP!

Warm UP!. Which are quantitative and which are qualitative observations? The road is wet I weighed the rice There are a dozen females in the herd

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Warm UP!

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  1. Warm UP! Which are quantitative and which are qualitative observations? • The road is wet • I weighed the rice • There are a dozen females in the herd • A hunter wanted to do an experiment to see which kind of bait would catch the most squirrels. He set one trap out with out any bait, One trap with peanut butter and one with walnuts. Each trap were set at the same time and same type of location in the same woodlot every day for a week. At the end of the week the hunter counted the number of catches he had for each trap. • What was his independent variable? why • What was his dependent variable? Why • Write a possible hypothesis the hunter could have made about his experiment

  2. Chemical Basis for Life Chapter 6

  3. Why do we need Chemistry in Biology? An understanding of biology requires a little knowledge of chemistry. It is important to know aspects of chemistry to make biology come alive.\ for example: any living organism is really just a complex network of chemicals and atoms!

  4. Matter • is anything that takes up space and has mass. • is made of atoms, which are the smallest particles of an element that still have all the properties of an element.

  5. States of Matter

  6. Elements and Atoms

  7. Atoms • Smallest amount of an element • Made up of 3 subatomic particles • Neutrons (o) = neutral/no charge • Protons (+) = positive charge • Electrons (-) = negative charge

  8. Atoms • Electrons (e-) are in motion in the space around the nucleus. • # E- = # P+ Protons (p+) and Neutrons are found in the nucleus of the atom.

  9. Atoms An element’s atomic number = the # of protons and # of electrons the element has The positive charge from the Proton and the Negative charge from the electron, balance out the charge of the atom, making it neutral in charge Atomic # Carbon has 6 electrons and 6 protons

  10. Electron Distribution • Electrons are distributed into energy levels that surround the nucleus • An atom can only have a maximum of 2 e- in the first energy level, 8 in the second, 18 in the 3rd and 32 in the 4th • Valance electrons: the electrons on an Atom’s outermost energy level

  11. Draw a Nitrogen atom with an atomic number of 7. How many valence electrons does this atom have?

  12. Draw a Neon atom with an atomic number of 10 How many valence electrons does this atom have?

  13. Get in partners and collect materials we’re going to practice drawing atoms

  14. The “quiz” • Draw an atom on a piece of printer paper. • At the Top of the printer paper put your name, the name and atomic number of your Element along with the number of valence e- • Label the following parts of your atom: • the electrons, protons and neutrons and indicate the charge that is associated with each • The 1st – 3rd energy level and indicate the maximum number of electron that can go in each level • The nucleus

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