Science 1 st 9 Weeks Review

 Review  Slides 3- 42

 _______ is a statement written in a manner that describes the cause and effect relationship between the independent variable and dependent variables in an experiment.

 hypothesis

 Observations are made using the ________.

 5 senses

 What does a magnifying glass do?

 Enhances the vision of an item

 _________ are statements of what is expected to happen in the future based on past experiences and observations.

 Predictions

 A ____________ is a tentative explanation based on background knowledge and available data.

 inference

 A ____________ is a summary statement based on the results of an investigation.

 conclusion

 In science, it is important that experiments and the observations recorded are replicable. What does this mean?

 Replicable = can repeat

 _____________ data deals with descriptions and data that can be observed but not measured precisely.

 qualitative

 _________ data can be counted or measured and the results can be recorded using numbers.  Can be represented visually in graphs and charts.  More valuable in science because they allow direct comparisons between observations

 Quantitative

 Friendly  Like science  Positive about school work

 Qualitative

 25 students  10 boys, 15 girls  68 percent have perfect attendance

 Quantitative

 The amount a container can hold.  The amount of space occupied by an object.

 volume

 The distance between 2 points.

 length

 A body of matter with no specific shape.

 mass

 A metric unit of mass equal to 1 thousandth of a kilogram

 gram

 The measure of the amount of thermal energy in the atmosphere

 temperature

 Metric unit for measuring temperature  On this scale, water freezes at 0 degrees  Water boils at 100 degrees

 Celsius

 A number representing a specific point in hours, minutes, and seconds

 time

 A unit of time equal to 1 sixtieth of an hour  60 seconds

 minute

 This is when we put natural events in a sequence that allows us to notice change over time. (life cycles, moon phases, tidal changes)

 Natural events sequenced chronologically

 Review  Slides

 Simple machines make work ___________.

 easier

 A stiff bar that moves about a fixed point (fulcrum).  It is used to push, pull, or lift things.

 lever

 A flat surface that is raised so one end is higher than the other.  Helps move heavy objects up or down.

 Inclined plane

 Wide at one end and pointed at the other.  Helps cut or split other objects.

 wedge

 A rod attached to a wheel.  Makes it easier to move or turn things.

 Wheel and axle

 An inclined plane wrapped around a cylinder or cone.  Holds objects together.

 screw

 A wheel that has a rope wrapped around it.  Used to life heavy objects by changing the direction or amount of force.

 pulley

 Seesaw  Crowbar  shovel

 lever

 ramp

 Inclined plane

 Knife  ax

 wedge

 Bicycle wheels  roller skates  doorknob

 Wheel and axle

 Jar lid  Wood screw

 screw

 Flagpole  Venetian blinds

 pulley

 A ______________ is a combination of 2 or more simple machines.

 Compound machine

 Bicycle  Wheelbarrow  Scissors

 Compound machine

 Which kind of work is made easier by the wheels of a wagon?

 Pulling a heavy load

 Review  Slides

_______________ remain the same even if the visible material is reduced in size.  Examples: color, texture, phase, temperature, ability to dissolve in water

 Physical properties

 Ice cubes are an example of which form of water?

 solid

 Which of these dissolves in water?  A. Sand grains  B. Sugar cubes  C. Plastic straws  D. Wooden spoons

 B. Sugar cubes

 Every object that takes up space is made of __________.

 matter

 Observable characteristics that enable one to differentiate objects

 Physical properties