Introduction to Biology Unit One Introduction to Biology

Essential Question: What are the five major lab safety rules you should follow during every lab? Warm-Up: What are the six rules for this class? (See Syllabus)

Lab Safety Video https://www.youtube.com/watch?v=S6WARqVdWrE

What are the five major lab safety rules you should follow during every lab?

Cell phones in cell-phone caddy please!

Essential Question: Please place cell phones in cell-phone caddy! Warm-Up: Unit One Pre-Post Test

Please place phones in phone caddy! Essential Question: How does the independent variable differ from the dependent variable? Please place phones in phone caddy! Warm-Up: Coming next…

What are the different kinds of observations? 1. Qualitative Observation- what you see or sense a. Color b. Smell 2. Quantitative Observation- how much; has a number a. Mass b. Temperature

How does an inference differ from an observation? 1. Observations refer to noting a fact or occurrence by using our five senses. a. Sight b. Smell c. Touch d. Taste e. Hear 2. Inferences are explanations or interpretations of what you are observing; They are statements that explain what you are observing.

Observations vs Inferences Test Your Observation Skills

Worksheet: Observations vs Inferences

Check-Out: How does an inference differ from an observation?

Observation or Inference? The sky is blue There are clouds in the sky, it is going to rain Amy got a 100% on her test; girls are better at math The candle is burning. The room smells like vanilla

What are the steps of the scientific method? 1. Make an observation 2. Ask a question or pose a problem to solve 3. Make a hypothesis a. an educated guess that might be true b. it should be an if/then statement

a. Decide on your control- your standard for 4. Design and conduct your experiment a. Decide on your control- your standard for comparison; this group will not be altered b. Choose one variable to change, the independent Variable c. The dependent Variable-what happens as a result of the independent variable

b. Display a graph of your results c. Discuss the results 5. Record your observations a. Fill in a data table b. Display a graph of your results c. Discuss the results

6. Write your conclusion. You will either accept or reject your hypothesis Steps of the Scientific Method

Lab: What factors determine how fast a substance dissolves?

Check-Out: How does the independent variable differ from the dependent variable? Quantitative or Qualitative? a. 55 grams b. Soft c. 80 cm d. smells like cake e. 100%

Essential Question: What are the 8 characteristics of life? Please place cell phones in the caddy! Warm-Up: Analyze an experiment

Read section1-3 : Studying Life and define the six terms on your study guide.

How does a theory differ from a law? Theory-a collection of related hypotheses that have not been rejected 2. Law-a statement of observed facts that has been tested many times and is accepted as true 3. Science progresses by systematically eliminating potential hypotheses that are not consistent with observation

What are the 8 characteristics of life? 1. All living things are made of cells a. Prokaryotic Cells (Bacteria); usually one cell b. Eukaryotic Cells (Plants or Animals

Asexual Reproduction- one parent; bacteria 2. Living Things Reproduce Asexual Reproduction- one parent; bacteria b. Sexual Reproduction- two parents

homeostasis; keep things the same a. Temperature b. Blood Pressure 3. Living things maintain balance or homeostasis; keep things the same a. Temperature b. Blood Pressure

4. Living things have DNA, the universal code for traits and characteristics

a. Movement of parts; plants grow towards the light 5. Living things respond to the environment a. Movement of parts; plants grow towards the light b. Locomotion from one place to another; walk to find food or water

6. Living things grow and develop a. Increase in the size or number of cells b. Change in body design; Tadpole  Frog

a. Eat b. Drink c. Go to the bathroom 7. Living things obtain and use energy a. Eat b. Drink c. Go to the bathroom

a. Change to stay alive in response to changes in the environment 8. Living things change over time-they evolve/adapt a. Change to stay alive in response to changes in the environment b. Usually takes a long time to occur  

Essential Question: Why are viruses not “alive”? Warm-Up: Which characteristic of life? A jogger running through the park. Enjoying a delicious ice cream sundae. Swatting a fly away from your face. Sweating after a hard workout. Getting a haircut to get rid of split ends.

The Characteristics of Living Things

Check-Out: Why are viruses not “alive”?

Essential Question: What is the least complex level of organization and the most complex? Got homework: Have it out to be checked!!! Warm-Up: Coming next….

Students put the same type of bacteria in 15 petri dishes Students put the same type of bacteria in 15 petri dishes. Antibiotic A was applied to 5 dishes, Antibiotic B was applied to 5 dishes, and antibiotic C was applied to the last 5 dishes. At the end of two weeks, the number of bacteria cultures were counted.

a. What were the constants. b. What was the manipulated variable. c a. What were the constants? b. What was the manipulated variable? c. What was the responding variable? d. Was there a control?

How is life organized from least complex to most complex? Atoms 2. Molecules -two or more atoms joined together

3. Organelles a. Nucleus b. Mitochiodria 4. Cells

5. Tissues a. Blood b. nervous 6. Organs; a. heart b. kidney c. brain

a. Nervous b. Skeletal c. Muscular 8. Organisms a. Bacteria b. Animals 7. Organ Systems a. Nervous b. Skeletal c. Muscular 8. Organisms a. Bacteria b. Animals c. Plants

a. Pride of lions b. Gaggle geese 9. Populations- all the same type of organism a. Pride of lions b. Gaggle geese

populations living in a specific place, like a pond 10. Community- a collection of different populations living in a specific place, like a pond a. Pond with frogs, fish, cattails, etc…. 11. Ecosystem- all the different kinds of organisms that live in an area together with their physical environment 12. Biome-a group of ecosystems with the same climate 13. Biosphere- land, water and air where all life exists  

Biological Levels of Organization

Check-Out: What is the least complex level or organization and the most complex?

Please place cell-phones in caddy! Essential Question: How do you determine the magnification using a microscope? Please place cell-phones in caddy! Warm-Up: Which is more complex? A tissue or a cell An organelle or an organ A population or a biome A molecule or a community An organ system or a organism

Check-Out: How do you determine the magnification using a microscope? What are three things you need an electron microscope to see? What are three things you can see with a light microscope?