lab safety rules
What's the first lab rule?
Dress appropriately. Before entering the lab, make sure to put on a lab coat.
How many Millimeters are in a meter?
1000
What's the meaning of empirical?
based on, concerned with, or verifiable by observation or experience rather than theory or pure logic.
What are the 7 steps of the scientific method?
Question
Research
Hypothesis
Experiments
Data
Conclution
1. You water three sunflower plants with saltwater. Each plant receives a different concentration of salt solutions. A fourth plant receives pure water. After a two week period, the height is measured.
What's the independent variable?
Salt Water
TRUE or FALSE
One of the lab rules is keep work in a messy place where everything is under your eyes
False
TRUE or FALSE
There's 0.1 centimeter in a meter.
True
What is a model
A usually miniature representation of something.
what is the meaning of observation in the scientic Method
Information collected using the five senses and/or scientific tools (thermometers, microscopes, rulers, graduated cylinders)
1. Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left outside in normal conditions. Height of the tree is measured once a week.
What's the dependent Variable?
The Redwood trees
What are eyewashes used for?
For removing particles, chemicals, or other substances from your eyes.
What is the mentric system?
a system of measurement that uses the meter, liter, and gram as base units of length volume and weight respectively.
TRUE or FALSE
an exemple observable : is when someone falls in everywhere
False
What's the difference between observation and Inference
An observation uses your five senses, while an inference is a conclusion we draw based on our observations.
Pea plant clones are giving different amounts of water for a three-week period. The first pea plant receives 400 milliliters a day. The second pea plant receives 200 milliliters a day. The third pea plant receives 100 milliliters a day. The fourth pea plant does not receive any extra water; the plant only receives natural ways of receiving water. The height of pea plants is recorded daily.
What's the control group?
The fourth pea plant that does not receive any extra water.
What is the most important lab safety rule?
To know the location of and how to use safety equipment
What are the basic measurements?
mass (weight), distance or length, area, and volume
synonyms of theory that starts with a P
presumption
what is a control group used for in a experimenet?
to establish a cause-and-effect relationship by isolating the effect of an independent variable
One tank of goldfish is fed the normal amount of food once a day, a second tank is fed twice a day and a third tank four times a day during a six-week study. The fish’s weight is recorded daily.
What has to stay constant?
Everything except the amount of food being giving
Why do we use the lab safety rule?
To helps people avoid spills and other accidents, as well as damage to the environment outside of the lab.
what is a graduated cylinder used to measure?
what is a scientific law?
A statement about a scientific phenomena that always occurs under the right conditions.
what is a dependent variable?
You want to test which size of soccer (football) ball is easiest to juggle with your feet. You test a size 3, size 4, and a size 5(regulation size) ball. You count the seconds the ball stays in the air for each of the trials. You allow yourself to use both of your feet, knees, and head to juggle the ball.
What s the experimental group?
The different sizes of soccer ball