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Lab Equipment
Lab Safety
Scientific Method
Random
Ecosystems
100
This is a piece of equipment that you use to magnify specimens in the lab.
Microscope
100
What do you use to hold a test tube when heating it?
test tube holder
100
If people drink 4 alcoholic drinks, then they are more likely to crash when driving, because alcohol impairs your judgement. This is an example of what step of the scientific method?
hypothesis
100
Which variable is the one the experimenter can manipulate in an experiment?
The Independent Variable
100
What are the three types of symbiotic relationships?
parasitism, mutualism, and commensalism
200
Name the piece of equipment you use to measure liquid volume accurately, using the meniscus
Graduated cylinder
200
What types of shoes are allowed in the laboratory?
closed-toed shoes
200
At the end of an experiment you write a statement to either accept or refute your hypothesis. What step of the scientific method is this?
Conclusion
200
This shows a single flow of energy in an ecosystem
food chain
300
Name the equipment that you use to swirl, mix, or store liquid chemicals in; but, it is not good for measuring liquids.
Erlenmeyer flask
300
How do you mix water and acid?
Always pour acid INTO water! Never do it the opposite!
300
In an experiment besides the Independent Variable (the one variable you change), all the other factors must remain the same. If not, it may ruin your data. What are these factors known as what in the experiment?
constants
300
3,000 people were divided into 3 groups to see how excercising affects pulse rate. Group 1 did no excercise for 10 minutes. Group 2 did a mild excercise (walking) for 10 minutes Group 3 did strenous excercise for 10 minutes. At the end of 10 minutes everyones pulse rate was recorded. What is the dependent variable (what you MEASURE) in this experiment?
Pulse or heart rate of each person
300
Otters float on a sea grass called kelp, in the ocean. It provides them a place to float and eat. Sea urchins eat the kelp, but otters eat sea urchins. What kind of symbiotic relationship exists between the kelp and otters.
mutualism
400
When you need to measure the mass of something as precisely as possible (in grams), what piece of equipment do you use?
triple beam balance
400
A student splashes chemicals in his eyes and on his clothes. What should he do?
Wash his eyes and body, with running water, for several minutes (10 mins.)
400
What is the standard of comparison in an experiment called? You compare all data collected to this.
Control
400
Harold wants to know eating breakfast helps you do better on a test. He gets 10 friends who take science with him to do an experiment. 5 friends eat breakfast before their science test and 5 do not. After the test Harold records all their grades. What is the independent variable in this experiment?
Eating breakfast
400
There are 872 gray mice living in a square mile in Rockdale, TX. In the organization of living things, what do the mice represent?
population (they are all the same species in an area)
500
When you use a microscope, what is the cover slip for?
To cover the specimen on the slide before you put it on the microscope.
500
How do you correctly smell something in the lab?
use a wafting motion
500
If you are making a graph, which axis is the independent variable graphed on? And the dependent variable is graphed where?
x-axis (MIX) independent (what you changed) y-axis (DRY) dependent (what responded, what you are measuring) must be in this order to be correct
500
Jody has itchy feet. Her friend Beth tells her soaking her feet in salt water will help. Her friend Mary tells her putting lotion on each night with socks will help. Jody decides to do an experiment and try both remedies. After 1 week her feet don't itch anymore. Jody decides both remedies worked. What is wrong with Jody's conclusion?
She tested both rememdies at the same time so there is no way to know if both really worked, or just one of them.
500
If you are making a graph which axis does the Independent Variable go on (X or Y) and which axis does the Dependent Variable go on (X or Y)?
Independent Variable - X Dependent Variable - Y