Elementary Essential Lab Levers on Me

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ElementaryEssential Lab Levers on Me

• Science Capacity Development School Reform
  Accountability

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Agenda

• Lab Norms
• Bellringer
• Sunshine State Standard
• Engage - BrainPOP
• Explain Background Knowledge
• Explore - Lab
• Elaborate
• Evaluate
• Gizmo

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Lab Norms

• 1. Be responsible.
• 2. Follow ALL instructions carefully. 
• 3. Please avoid touching any equipment,
  chemicals, or other materials in the laboratory
  area until you are instructed to do so.
• Avoid eating food, drinking beverages, or chewing
  gum in the laboratory. 
• Dress properly during a laboratory activity
  safety goggles, lab coats, long hair tied back,
  no sandals, no dangling jewelry.

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Levers on Me Lab

• Florida Sunshine State Standard Benchmark
  SC.H.3.2.1
• The student understands that people, alone or in
  groups, invent new tools to solve problems and do
  work that affects aspects of life outside of
  science.
• Additional Florida Sunshine State Standard
  Benchmarks
• SC.H.3.2.3 The student knows that before a group
  of people build something or try something new,
  they should determine how it may affect other
  people.

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Bellringer

• Cities like West Palm Beach have water
  purification programs to keep drinking water free
  from bacteria and other pollutants. How does
  this help people living in cities?

• It eliminates filters from factories.
• It produces large amounts of water.
• It helps people by cleaning the air they breathe.
• It helps people by making the water safer to use.

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ENGAGE
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EXPLAIN Background Knowledge

• SC.H.3.2.1 also assesses SC.H.3.2.3.
• Students need to understand simple tools and how
  these tools help us.
• Benchmark is assessed as MC, SR (low, moderate,
  high complexity).
• People in many jobs must use tools. Cooks use
  pots and pans. Mechanics use screwdrivers and
  wrenches.
• Scientists use tools to measure and observe
  objects in nature.

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Scientific Tools

• People in their everyday lives use tools. We use
  tools at our jobs and we use tools, such as pots
  and pans, to help us cook.
• Construction workers and mechanics use
  screwdrivers and wrenches.
• Scientists use tools to measure and observe
  objects in nature.

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Scientific Tools
A tape measure helps you measure the length of
curved or irregular surfaces like your head. It
measures in units called centimeters (cm).
A spring scale can measure weight or friction.
It measures in units called newtons (N).
A magnifying box allows us to study small objects
such as pebbles or bugs.
Pictures obtained from Harcourt Online
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Scientific Tools
A microscope allows us to see things too small
for the naked eye (without glasses or contacts).
A thermometer measures the temperature of liquids
and the air. It is measured in degrees Celsius
or Fahrenheit.
Use a dropper to move small amounts of liquid or
to measure the volume of a liquid by counting
drops.
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Scientific Tools
A balance is a tool that measures the amount of
matter in an object it measures its mass. The
unit for mass is grams (g).
Forceps help you pick up small objects. They
help you to hold up the object when you are
looking through a hand lens.
A hand lens allows you to look at objects with
more detail. When you place the object beneath
the lens, the lens makes the object look larger.
Pictures obtained from Harcourt Online
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Additional Background Knowledge

• A simple machine is a tool that makes it easier
  for us to do things.
• A lever is a simple machine. It makes it easier
  for us to move things.
• Levers have two parts the arm and the fulcrum.
• A rake is an example of a lever. This simple
  machine reduces the force needed to lift or move
  an object.

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Team Jobs
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Team Jobs
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Purpose

• To provide students with the understanding of
  how simple tools can help us do work.

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Objective
I can identify how simple tools, such as a lever,
can help us to solve problems and do work.
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Materials

• 1 plastic ruler with metric measurements (cannot
  be bendable)
• 1 paper ruler
• 1 small box
• 5 marbles or other small objects of equal size
  and weight
• 1 rubber band
• tape

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Hypothesis

• If you place the fulcrum close to the object,
  then the object will
• ____________________________.

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EXPLORE Procedures

• Place the pencil under the ruler (like a see-saw)
  at the 15 cm mark.
• Tape the box (with marbles inside) on one end of
  the ruler.
• Put the five marbles inside the empty box.
• Slip a rubber band around the other end of the
  ruler.
• Allow this end of the ruler to stick out
  approximately 1 cm over the edge of the table.

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EXPLORE Procedures

• Use the rubber band to lift the box. You will
  need to pull the rubber band stretching it down
  so that you lift the box with the marbles at the
  other end of the ruler. Continue to lift until
  the rubber band end of the ruler touches the
  table.
• When the ruler touches the table, record the
  height (in centimeters) that the box was lifted.
• Change the position of the fulcrum two additional
  times. Record the measurement and then repeat
  step 6 for each changed position.
• Record your results on the table.

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Collecting Data

• Data is the information gathered during an
  experiment. Sometimes data involves counting or
  measurements such as length.
• Data that involves numbers or measurements should
  be organized in a table. Once the data has been
  collected from the experiment, it must be
  analyzed, or a decision about what the data means
  is drawn.

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Levers on Me Data
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Graphing

• Sometimes calculations need to be completed. In
  addition, a graph may need to be compiled. A
  graph helps people to understand the data and
  gives viewers a picture of the data. A conclusion
  about what was learned from the experiment can
  then be drawn from the analyzed data.
• Use the data collected and construct a bar graph.

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Conclusion

• A conclusion is an explanation based on
  evidence from observations. It answers, Does the
  data support the hypothesis?

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Conclusion

• 1. Was your hypothesis correct? Why or why not?
• 2. Where did you have to position the fulcrum so
  that the box was able to be lifted higher?
  Explain.
• 3. What do think would happen if the box was
  empty? Explain.
• 4. Why do you think this tool is important to
  our everyday lives?

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Elaborate
ExploreLearning Gizmos Levers
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EVALUATE
Billy is packing his backpack to go on a hiking
trip. Which of the following tools would come in
handy the most while hiking through the woods?

• Hammer
• Compass
• Pencil
• Saw

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Science Capacity Development Team
Cristian Carranza, Science Manager cristian.carran
za_at_palmbeach.k12.fl.us