### unit notes power point

```Steps of The Scientific Method:
Problem
P = ___________________________
What is the main question being asked?
Steps of the Scientific Method:
Hypothesis
H = _____________________________________
“Educated Guess”
This should be an “IF - THEN” statement
Ie. – “IF” we do not water the plants,
“THEN” they will not grow!
Steps of the Scientific Method:
Experiment
E = _____________________________________
ALERT - Within the Experiment, we need to look for the…
Control Group:____________________________________________
recommended treatment
Experimental Group:_______________________________________
A measurement that we CAN control
Independent Variable:_____________________________________
(the “IF” part of the hypothesis)
A measurement that we CANNOT control
Dependent Variable:______________________________________
(The “THEN” part of the hypothesis)
Things that are the same for all groups
Constants:_______________________________________________
Steps of the Scientific Method:
Observation
O = _____________________________________
What is it that you are actually being
asked to look for or measure?
Steps of the Scientific Method:
Conclusion
C = _____________________________________
A Final statement that either supports
or refutes the hypothesis
Example – Grow Plant Grow!
Pete thought that if a plant received 250 mL of water, it would grow the
tallest. He planted ten seeds in each of 5 pots found around the house
that contained 500 g of “Pete’s Potting Soil.” The recommended
amount of water for the plants to receive is 150 mL. The pots were
given the following amounts of water each day for 40 days: pot 1=50
mL, pot 2 = 100 ml, pot 3 = 150 ml, pot 4 = 200 ml, pot 5 = 250 mL. The
height of each plant was measured at the end of the experiment.
WRITE A HYPOTHESIS FROM THIS SCENARIO……
IF Pete gave a plant 250 mL of water a day,
THEN that plant would grow the tallest.
Pete thought that if a plant received 250 mL of water, it would grow the
tallest. He planted ten seeds in each of 5 pots found around the house
that contained 500 g of “Pete’s Potting Soil.” The recommended
amount of water for the plants to receive is 150 mL. The pots were
given the following amounts of water each day for 40 days: pot 1=50
mL, pot 2 = 100 ml, pot 3 = 150 ml, pot 4 = 200 ml, pot 5 = 250 mL. The
height of each plant was measured at the end of the experiment.
WHAT IS THE INDEPENDENT AND DEPENDENT VARIABLE IN
THISSCENARIO…… (Hint: The independent variable will be the “if” part
of the hypothesis and the dependent variable will be the “then” part of
the hypothesis.
IF Pete gave a plant 250 mL of water a day, THEN that plant would grow the tallest.
Independent = amount of water
Dependent = height of plant
Pete thought that if a plant received 250 mL of water, it would grow the
tallest. He planted ten seeds in each of 5 pots found around the house
that contained 500 g of “Pete’s Potting Soil.” The recommended
amount of water for the plants to receive is 150 mL. The pots were
given the following amounts of water each day for 40 days: pot 1=50
mL, pot 2 = 100 ml, pot 3 = 150 ml, pot 4 = 200 ml, pot 5 = 250 mL. The
height of each plant was measured at the end of the experiment.
WHAT ARE THE CONSTANTS IN THIS EXPERIMENT?
500 grams of Pete’s Potting Soil ; tested for 40 days
WHAT IS THE CONTROL?
150 mL of water.
HOW MANY DIFFERENT TREATMENTS (OR GROUPS) ARE THERE?
5
HOW MANY TRIALS ARE IN EACH TREATMENT OR GROUP?
10
TEAM TIME…..
Sandy heard that plants compete for space. She decided to test this idea.
She bought a mixture of flower seeds and some potting soil. Into each
of the 5 plastic cups, she put the same amount of soil. The amount of
seeds in each cup were as follows: Cup A = 2 seeds, Cup B=4 seeds, Cup
C = 8 seeds, Cup D = 16 seeds, Cup E = 32 seeds. After 25 days, she
determined which of the plants looked the best. She predicted that
cup E would do the worst.
IN YOUR TEAM, DECIDE ON THE FOLLOWING…..
HYPOTHESIS: If plants were planted close together, THEN they would not do well
INDEPENDENT VARIABLE:
How many seeds were put in a cup
DEPENDENT VARIABLE: How well the plant did
CONSTANT(S): Same amount of soil, looked at for 2 days, used plastic cups
CONTROL:
NONE!!!
NUMBER OF GROUPS: 5
TRIALS PER GROUP: 1