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Phy Sci Test 1
Scientific Method/Lab Safety/Measurements
| Question | Answer | ||||||
|---|---|---|---|---|---|---|---|
| Which step in the scientific method involves having a two part set up? | Experiment | ||||||
| Describe independent variable | It is the factor being tested | for example: fertilizer added to a plant is the independent variable | |||||
| Describe dependent variable | It is what happens in the experiment as a direct result of adding the independent variable | for example:the tomatoes grew larger so this is the dependent variable | |||||
| In stating the problem for your experiment, what form should it be in? | Always in question form | ||||||
| what are words you should never use in the hypothesis or conclusion? | Do not use words such as maybe, I think etc. | ||||||
| What is a variable? | The factor being tested or the factor that changes. | ||||||
| The experimental group in an experiment is compared to the... | control group | ||||||
| Broken glassware should never be put where? | In a classroom trashcan | ||||||
| If glass is broken, what should you do first? | Tell your teacher and do not try to clean it up on your own | ||||||
| Why should you not eat or drink in the lab? | Your food may be contaminated or you could accidentally ingest a dangerous chemical | ||||||
| How should you smell a chemical? | Waft it toward your nose with one hand. | ||||||
| What should you do before anything in the lab? | listen to or read the instructions carefully | ||||||
| What are the three categories listed on the hazmat diamond? | Health | Flammability | Reactivity | ||||
| What is the number scale on the hazmat diamond? | 0-4 | ||||||
| What should yo do with long hair in the lab? | Always put it up | ||||||
| What are the most common lab injuries? | cuts/punctures | burns | |||||
| What type of shoes should be worn in the lab? | Closed toe shoes | ||||||
| What is an exact quantity people agree to use for comparison? | A standard | ||||||
| What people in the past use for measurement? | The body parts of the current King. | ||||||
| What are the only 3 countries to use the English system of measurement? | United States | Myanmar | Liberia | ||||
| What is the metric unit for length | meter | ||||||
| What instrument is used for length | metric ruler | ||||||
| What is the metric unit used for mass | gram | ||||||
| What instrument is used for mass | metric balance or triple beam balance | ||||||
| What is the metric unit for volume | liter or cubic centimeter | ||||||
| What instrument is used for volume | glassware or metric ruler | ||||||
| What is volume | the amount of space an object takes up | ||||||
| What unit is used for temperature? | degrees celcius | ||||||
| how do you calculate volume? | length x width x height | ||||||
| What is the unit for measuring time | second | ||||||
| What instrument is used to calculate time | stopwatch | ||||||
| Who came up with the standard for time? | Galileo | ||||||
| value of kilo | 1000 | ||||||
| value of hecto | 100 | ||||||
| value of deca | 10 | ||||||
| value of deci | 0.1 | ||||||
| value of centi | 0.01 | ||||||
| value of milli | 0.001 | ||||||
| abbreviation for milliliter | mL | ||||||
| abbreviation for centimeter | cm | ||||||
| abbreviation for gram | g | ||||||
| abbreviation for meter | m | ||||||
| abbreviation for millimeter | mm | ||||||
| convert: 200mg to g | .2 g | ||||||
| convert: 2500m to km | 2.5 km | ||||||
| convert: 50cm to m | .5 m | ||||||
| convert: 75 mL to L | .075 L | ||||||
| convert: 5.6 m to mm | 5600 mm | ||||||
| compare < > or = 63 cm and 6m | .63 m < 6m | ||||||
| compare < > or = 536cm and 53.6 dm | 536cm = 536cm | ||||||
| How do you calculate density? | 1) find the mass 2)find the volume 3) divide mass/volume | ||||||
| find the density: a ruby has a volume of 1.6 cubic cm and a mass of 6.7g | d=m/v d=6.7g/1.6cm d=4.19 g/cubic cm | ||||||
| calculate the density of a liquid with the volume of 28mL and a mass of 26.4 g | d=m/v d=26.4g/28mL d=.94g/mL | ||||||
| List the steps of the scientific method | 1) What is the problem? | 2) Gather information | 3) Make a hypothesis | 4) Experiment | 5) Record Data | 6) Conclusion | 7) Repeat the experiment |