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Nature of Science.

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Presentation on theme: "Nature of Science."— Presentation transcript:

1 Nature of Science

2 Experim Design Safety Lab Equip Measurement Intrepret Graphs 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400

3 Experimental Design 100 An educated guess is a(n) ____ which is a possible explanation of an experimental question

4 Hypothesis

5 Experimental Design 200 ______- explanation about sets of related observations based on proven hypotheses tested by many of researchers

6 theory

7 Experimental Design 300 Ten seeds were planted in each of five pots that were found around the house. Each contained 300mg of potting soil. The pots were given the following amounts of water for 40 days : a) 50ml, b) 100ml, c) 150ml, d) 200ml, e) 250ml. Pot # 3 received the recommended amount of water. Plant height was measured at the end of the experiment. Give a hypothesis Give the IV Give the DV

8 If more water is applied to a plant then more growth will be seen.
IV- amount of water DV- height of plants in cm

9 Experimental Design 400 Ten seeds were planted in each of five pots that were found around the house. Each contained 300mg of potting soil. The pots were given the following amounts of water for 40 days : a) 50ml, b) 100ml, c) 150ml, d) 200ml, e) 250ml. Pot # 3 received the recommended amount of water. Plant height was measured at the end of the experiment. Control 2 improvements to experiment c. Type of data collected d constants

10 If more water is applied to a plant then more growth will be seen.
IV- amount of water DV- height of plants in cm 2 constants- 300mg per pot of soil and 10 seeds per pot 2 improvements- more trials, same size and type of pots Collected plant height in cm

11 What is the proper way to heat and view a test tube?
Safety 100 What is the proper way to heat and view a test tube?

12 Point/tilt away from everyone and viewing from the side, and never stopper the top

13 Safety 200 Your lab partner splashes hydrochloric acid in their eyes because they weren’t wearing their safety goggles, what should you do?

14 First help them to the eye wash station, then tell your teacher, and finally go to the nurse

15 You are heating a beaker and you notice it is cracked. What do you do?
Safety 300 You are heating a beaker and you notice it is cracked. What do you do?

16 Turn the heat off and remove the cracked glassware from the heat to cool.

17 Give two things wrong with each picture (A-C)
Safety 400 Give two things wrong with each picture (A-C) A. B. C.

18 Not paying attention to lab, no goggles
No heat-resistant gloves, test tube not tilted and maybe too far into heat No goggles, loose clothing, hair not tied back

19 Give two pieces of equipment that could be used to heat a liquid?
Lab Equip 100 Give two pieces of equipment that could be used to heat a liquid?

20 Hot plate and Bunsen burner

21 Lab Equip 200- Give the name of each piece of equipment

22 Micropipette, petri dish, graduated cylinder

23 Beaker, micropipette, graduated cylinder, dropper pipette
Lab Equip 300 Rank the order of most accurate minute volume measurement to least accurate Beaker, micropipette, graduated cylinder, dropper pipette

24 Micropipette, dropper pipette, graduated cylinder, beaker

25 Lab Equip 400 Give four pieces of equipment that would be needed for the examination of a frog’s heart, lungs, stomach, and ovaries

26 Scalpel, dissecting pins, dissecting tray, dissecting scissors, razor blade

27 Measurement 100 Give an example of a qualitative and quantitative data measurement from the green bean and snow pea lab

28 Qualitative- green beans are rounder and longer than snow peas which are flatter and shorter
Quantitative- green beans are on average 13 cm in length in which snow peas are about 6 cm in length

29 Give the standard metric unit for each of the following:
Measurement 200 Give the standard metric unit for each of the following: Temperature, mass, volume, and length

30 Temp- celcius Mass- grams Volume- liter Length- meter No prefixes

31 Measurement 300 If when measuring out a chemical from a bottle at your lab station, you have excess chemical what do you do with it? Why?

32 Do not put it back in your stock jar, don’t dump down the sink, don’t leave it for the next group BUT put it in the teacher designated waste container

33 Read the measurements below
Graduated cylinder thermometer ruler

34 47.1 ml C mm/3.28 cm Read all numbers you know and then estimate the last number

35 Graphs 100 Describe what variable goes on the X axis and what variable goes on the Y axis

36 X axis- independent variable which the experimenter can manipulate
Y axis- dependent or responding variable which responds to the independent variable

37 Graphs 200 How do you setup graph?

38

39 Graphs 300

40

41 Graphs 400

42 Food supply increase


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