Chapter One: The Nature of Science. 1.1 What is Science? 1.2 Science in Context 1.3 Studying Life. What are the GOALS of SCIENCE???. P rovide natural explanations for events in the natural world. U se those explanations to… understand patterns in nature
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1.1 What is Science?
1.2 Science in Context
1.3 Studying Life
What do I already know?
A scientific explanation for a set of observations that can be tested in ways that support or reject it.
A possible explanation for what you expect to happen
Ex. Plants will grow toward a source of light.
Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Smithers counts how many stacks of papers each group has made. Group A made 1,587 stacks, Group B made 2,113 stacks.
Data – detailed records of experimental observations
OBSERVATIONS: Flies land on meat that is left uncovered. Later, maggots appear on the meat.
HYPOTHESIS: Flies produce maggots.
jars, type of meat,
gauze covering that
keeps flies away from
No maggots appear
CONCLUSION: Maggots form only when flies come in contact with meat. Spontaneous generation of maggots did not occur.Redi’s Experiment on Spontaneous Generation
Inference Controlled Experiment
Data Control Group
Observation Independent Variable
Hypothesis Dependent Variable
(pgs 10-15); 1.1 Assessment (pg 23)
#1-5, 7, 9-12 (write Q & only Answer for Multiple Choice)
What must one possess to be considered living?
Click on picture for short video clip on a sloths adaptation
BBC Earth – Saying Boo to a Sloth
What do I already know?
Metric Prefixes are used before a unit to make it smaller or larger
12 hm= ____ dm
8 cm = ____ m
0.64 kg = ____ mg
100 daL= ____ kL
40 mm = ___ dm
32 cg = ____kg
0.06 dL= ____ hL
36 dam = ____ km
7 cm = ____ hm
15 m = ____ mm
Compound Light Microscope
(TEM and SEM)
The human eye is capable of distinguishing objects down to a fraction of a mm. With the use of light and electron microscopes it is possible to see down to an angstrom and study everything from different cells and bacteria to single molecules or even atoms.
A head louse clasping a human hair. The image was taken using an SEM at 110x magnification. At low magnifications like this, SEM generates three-dimensional images that are in focus throughout the depth of the sample.
Transmission electron microscope image of a human leukocyte (also known as a white blood cell), showing the Golgi apparatus, which is a structure involved in protein transport in the cytoplasm of the cell.
1. 1 km = ___ m
2. 0.45 L = ___mL
3. 5000 mg = ___ g
4. 130 m = ___ km
5. 2500 mL = ___ L
6. 0.017g = ___ mg
1. 1000 m
2. 450 mL
3. 5 g
4. 0.13 km
5. 2.5 L
6. 17 mg