This section will introduce you do the special way of thinking and asking questions known as science. You will see that science investigations are sometimes carried out in a special way, called the scientific method. You will also learn about how models can be helpful to scientists. Next, we will talk about life. We will explore what makes something alive, how living things can be organized, and how we can name living things.

This section is important because it is the basis of everything else you will learn in science. Science has done many great things in our lives, from designing safety features for our cars to discovering medicines that are used to treat illnesses. But if we do not understand how science works, we cannot hope to make these kinds of discoveries. In order to study life science, we must know what make something alive, and what is the same and different about various living things

Scientific Concepts:

  • Know how to demonstrate how to use and care for a microscope, how to mount slides, and how to record data viewed through a microscope.
  • Design an experiment to track genetic traits.
  • Create a set of experiments that extract and isolate DNA in common foods.
  • Differentiate observation from inference (interpretation) and know scientists’ explanations come partly from what they observe and partly from how they interpret their observations.
  • Formulate and justify predictions based on cause-and-effect relationships.
  • Conduct multiple trials to test a prediction and draw conclusions about the relationships between predictions and results.
  • Follow a set of written instructions for a scientific investigation.


Select a Lesson

Is It Alive?
How can you tell if something is alive or not? For this activity, grab a pencil and paper and watch the video below. Write down whether you think it is alive or not, and what action is going on to make you think it’s alive. Ready?
Walk Around the House
Walk around your house. In each room, make an observation by using your senses (sight, sound, smell, touch and taste). Based on this observation, ask a question. For example, if you observe that the kitchen smells like cookies, you might ask, “Has someone been baking cookies?” Create a testable hypothesis that answers each of your …
Conducting Research
Think of an organism (bacteria, fish, reptiles…) that interests you. With adult help, search the Internet to find five web pages about this organism. Answer the questions below about each web site in your science journal: 1. Who wrote the site? (If unknown, write “unknown.”) 2. If the site has an author, does the site …
Thumb War Hypotheses
Different people have different sized thumbs and wrists. Do you think this will affect people’s success at winning a thumb war? Open up your science journal and write a hypothesis to answer this question. Now, find as many volunteers as you can. Measure everyone’s wrist and thumb circumference by wrapping the string around it and …
Observing the Placebo Effect
You’ll need a couple of volunteers for this experiment, but it’s totally worth it. Make sure you’ve got your science journal to record your results.
Classifying Objects
Grab a handful of buttons. Make sure there are all different kinds and colors. If you don’t have buttons, use any pile of objects, like matchbox cars, coins, nuts, etc. Now group the buttons according to size, color, texture, number of holes, shape, etc. You can do this activity with shells, peanuts, plant leaves, or …
Similar and Different Organisms
We're going to access another website (Seaworld) that has a HUGE catalog of living organisms and their scientific names. Here's how you do it: