- Количество слайдов: 42
Experim Design Safety Lab Equip Measure ment Intrepret Graphs 100 100 100 200 200 200 300 300 300 400 400 400
Experimental Design 100 An educated guess is a(n) ____ which is a possible explanation of an experimental question
Experimental Design 200 ______- explanation about sets of related observations based on proven hypotheses tested by many of researchers
Experimental Design 300 Ten seeds were planted in each of five pots that were found around the house. Each contained 300 mg of potting soil. The pots were given the following amounts of water for 40 days : a) 50 ml, b) 100 ml, c) 150 ml, d) 200 ml, e) 250 ml. Pot # 3 received the recommended amount of water. Plant height was measured at the end of the experiment. a. Give a hypothesis b. Give the IV c. Give the DV
a. b. c. If more water is applied to a plant then more growth will be seen. IV- amount of water DV- height of plants in cm
Experimental Design 400 Ten seeds were planted in each of five pots that were found around the house. Each contained 300 mg of potting soil. The pots were given the following amounts of water for 40 days : a) 50 ml, b) 100 ml, c) 150 ml, d) 200 ml, e) 250 ml. Pot # 3 received the recommended amount of water. Plant height was measured at the end of the experiment. a. Control b. 2 improvements to experiment c. Type of data collected d. 2 constants
a. If more water is applied to a plant then more growth will be seen. b. IV- amount of water c. DV- height of plants in cm d. 2 constants- 300 mg per pot of soil and 10 seeds per pot e. 2 improvements- more trials, same size and type of pots f. Collected plant height in cm
Safety 100 What is the proper way to heat and view a test tube?
Point/tilt away from everyone and viewing from the side, and never stopper the top
Safety 200 Your lab partner splashes hydrochloric acid in their eyes because they weren’t wearing their safety goggles, what should you do?
First help them to the eye wash station, then tell your teacher, and finally go to the nurse
Safety 300 You are heating a beaker and you notice it is cracked. What do you do?
Turn the heat off and remove the cracked glassware from the heat to cool.
Safety 400 A. Give two things wrong with each picture (A-C) B. C.
A. Not paying attention to lab, no goggles B. No heat-resistant gloves, test tube not tilted and maybe too far into heat C. No goggles, loose clothing, hair not tied back
Lab Equip 100 Give two pieces of equipment that could be used to heat a liquid?
Hot plate and Bunsen burner
Lab Equip 200 - Give the name of each piece of equipment
Micropipette, petri dish, graduated cylinder
Lab Equip 300 Rank the order of most accurate minute volume measurement to least accurate Beaker, micropipette, graduated cylinder, dropper pipette
Micropipette, dropper pipette, graduated cylinder, beaker
Lab Equip 400 Give four pieces of equipment that would be needed for the examination of a frog’s heart, lungs, stomach, and ovaries
Scalpel, dissecting pins, dissecting tray, dissecting scissors, razor blade
Measurement 100 Give an example of a qualitative and quantitative data measurement from the green bean and snow pea lab
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
Measurement 200 Give the standard metric unit for each of the following: Temperature, mass, volume, and length
Temp- celcius Mass- grams Volume- liter Length- meter No prefixes
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?
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
Measurement 400 Read the measurements below Graduated cylinder thermometer ruler
47. 1 ml 11. 0 C 32. 8 mm/3. 28 cm Read all numbers you know and then estimate the last number
Graphs 100 Describe what variable goes on the X axis and what variable goes on the Y axis
X axis- independent variable which the experimenter can manipulate Y axis- dependent or responding variable which responds to the independent variable
Graphs 200 How do you setup graph?
Food supply increase