1. Chapter One, Section 1 What is Physical Science?  Key Ideas:  What skills do scientists use to learn about the world?  What do physical scientists study?

2. Skills Scientists Use: Science is the study of the natural world. Scientists use the skills of observing, inferring and predicting to learn more about the natural world.  Observing- Using one or more senses to gather information. 2 Types of observations: 1) Qualitative Observations- Do not involve numbers or measurements, “That man is tall.” 2) Quantitative Observations- Involve measurements, “That man is 6’5” tall.”  Inferring (or making an inference)- Based on your observations or what you already know; not always correct.  Predicting- making forecast of what will happen in the future based on past experience or evidence

3. Observation Versus Inference! OBSERVATION:INFERENCE: The lady is wearing a ring on left hand ring finger. That lady is married. The boy is carrying an umbrella. It must be raining outside. The man has grey hair.That man is old.

4. Now you try! In your notes, classify the following as observations or inferences: She must go to the beach a lot. Her skin is very tan. I smell funnel cake! There may be an amusement park nearby.

5. How did you do? She must go to the beach a lot. Her skin is very tan. I smell funnel cake! There may be an amusement park nearby.  INFERENCE  OBSERVATION  INFERENCE

6. The Study of Matter and Energy Physical Science is the study of matter, energy, and the changes they undergo.  Matter is anything that has mass and occupies space.  Energy is the ability to do work or cause change. Turn to page 8 in your textbooks. What are the 2 main branches of Physical Science?

7. Branches of Physical Science PHYSICS  Study of matter, energy, motion, forces, and how they interact  Learn about different forms of energy  Apply the laws of physics that govern energy to Earth, the solar system, and the universe beyond  Ever wonder how a laser works? A physicist knows! CHEMISTRY  Study of the properties of matter and how matter changes  Learn about the particles that make up matter and properties of different forms of matter  Hydrogen alone is combustible. Oxygen alone is combustible. When combined in the form of water, H 2 O, they put out fire! Why?

8. BIG ideas of Physical Science  force and energy  the laws of conservation  atoms, molecules, and the atomic theory  The behavior of particles of matter in solids, liquids, and gases

9. Why Study Physical Science? Because it is used everyday in the real world! Who can think of some examples of when Physical Science is used in real life? Consider these examples:  The water you shower with is heated by chemical fuel or electricity  You use force to crush food when you eat  The food you eat is converted into chemical energy that your body uses to perform all of your daily tasks  There are chemicals in toothpaste you use to brush your teeth