HYPOTHESIS A statement that makes a CLAIM about how
2 things are related. Chocolate may cause pimples.
Salt in soil may affect plant growth. Plant growth may be affected by the color of the light.
Bacterial growth may be affected by temperature. Ultra violet light may cause skin cancer.
Temperature may cause leaves to change color.
HYPOTHESIS The 2 things are
VARIABLES. A change in one
VARIABLE causes a change in the other VARIABLE.
HYPOTHESIS The variable causing the
change is the INDEPENDENT VARIABLE (I.V.) or MANIPULATED VARIABLE.
The variable being changed is the DEPENDENT VARIABLE (D.V.) or RESPONDING VARIABLE.
“Exploding cars may cause injury”.
HYPOTHESIS LOOK AGAIN AT THE PREVIOUS
SENTENCES AND IDENTIFY THE I.V. AND THE D.V.
Chocolate may cause pimples. Salt in soil may affect plant growth.
Plant growth may be affected by the color of the light.
Bacterial growth may be affected by temperature.
Ultra violet light may cause skin cancer. Temperature may cause leaves to change
color.
HYPOTHESIS A statement that makes a CLAIM
about how 2 things are related. Chocolate may cause pimples.
Salt in soil may affect plant growth.
Plant growth may be affected by the color of light.
HYPOTHESIS A statement that makes a CLAIM
about how 2 things are related. Bacterial growth may be affected by
temperature.
Ultra violet light may cause skin cancer.
Temperature may cause leaves to change color.
HYPOTHESIS How do we know that it is the
Chocolate is causing the pimples? Temperature is causing the bacterial growth?
CONTROL Run the ENTIRE experiment WITHOUT the
INDEPENDENT VARIABLE See if pimples occur with NO CHOCOLATE
See if bacteria grow the same amount in ANY TEMPERATURE
SCIENTIFIC FACT An agreement made by qualified
scientists about many observations of the same thing.
FOR EXAMPLE: “There are 9 planets in our solar system”. Facts or definitions may change. They’re human created.
SCIENTIFIC LAW A relationship that ALWAYS holds
TRUE.For example:
GravityThe earth rotating around the sun
SCIENTIFIC THEORY A way of relating observations,
laws, and facts. An explanation (hypothesis) of
how or why something happens which is TESTED again and again.
Basically, a well-tested hypothesis.
It CAN change.
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