Scientific Method
What is the first step you should take when conducting a scientific investigation?
Ask a question/identify the problem.
What type of safety equipment should protect your eyes during a laboratory investigation?
Goggles
What is the standard metric unit for length?
Meter (m)
What is the amount of matter in an object called?
Mass
An observation that uses numbers or measurements is called what type of observation?
Quantitative observation
What is the variable that a scientist purposely changes during an experiment?
Independent variable
What should you do if a glass container breaks in the laboratory?
Tell the teacher and follow the proper procedure for cleaning up broken glass. Do not pick it up with your bare hands.
What is the standard metric unit for mass?
Gram (g)
What is the amount of space an object takes up called?
Volume
An observation that describes qualities or characteristics without using numbers is called what?
Qualitative observation
What is the variable that is measured or observed as a result of a change?
Dependent variable
Which piece of equipment is used to measure the temperature of a substance?
Thermometer
What is the standard metric unit for liquid volume?
Liter (L)
What is the formula for density?
Density = Mass ÷ Volume
A student wants to find out whether water temperature affects how quickly sugar dissolves. What should the student change?
Water temperature — the independent variable
A student investigates whether the amount of sunlight affects plant growth. What is the independent variable?
Amount of sunlight
Which piece of equipment is designed to accurately measure the volume of a liquid?
Graduated Cylinder
Convert 2.5 kilograms to grams.
2.5 kg = 2,500 g
An object has a mass of 40 g and a volume of 10 mL. What is its density?
Density = 4 g/mL
A student measures the mass of an object using a triple beam balance and finds it is 75 g. The object's volume is 25 mL. Calculate its density.
Density = 3 g/mL
A student tests whether different amounts of fertilizer affect plant height. The student uses the same type of plant, same soil, same amount of water, and same type of pot. What are these factors called?
Controlled variables/constants
What tool would you use to hold small liquid samples in multiple small wells/cavities for micro-scale reactions?
Spot Plate
A scientist measures a piece of string that is 3.75 meters long. How many millimeters long is the string?
3.75 m = 3,750 mm
A sample has a density of 5 g/mL and a volume of 8 mL. What is its mass?
mass = 40 g
A student conducts an experiment three times. Each time, the student changes the amount of sunlight but keeps the type of plant, soil, pot, and amount of water the same.
What is the independent variable, and name two controlled variables.