Nature of Science

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

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

Hypothesis

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

theory

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

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 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. 2 constants

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

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?

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

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?

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

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

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

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?

Hot plate and Bunsen burner

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

Micropipette, petri dish, graduated cylinder

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

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

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

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

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?

Graphs 300

Graphs 400

Food supply increase