Independent/Dependent Variables
The variable that is intentionally changed in an experiment
Independent Variable
this type of graph is best for comparing categories or groups
bar graph
The dog is shivering, so he is cold. Is this an observation or an inference?
inference
1 meter = ____ cm
100
In the scientific method, we ask a question and then make a hypothesis. How do we test our hypothesis?
Conduct an experiment
The variable that is measured in an experiment; this variable responds to changes in the independent variable
Dependent variable
This type of graph is best for showing change over time
line graph
Sarah has glasses. Is this an observation or an inference? If observation, is it qualitative or quantitative?
Observation, qualitative
What is a "standard" in measurement?
A universally-accepted constant; ex. a meter is the exact same length no matter where you are in the world
The purpose of conducting an experiment is to test a ...
hypothesis
Experiment: I want to see which kind of dog food my dog will eat the most of. So, I give him a different kind of dog food each week for 4 weeks and weigh how much food he leaves in his bowl. What is the independent variable in this experiment?
The type of food
What must every graph have so that viewers know what data is shown?
title, labels, and units
10 kg = ____ g
10,000
Information collected during your experiment is called:
a. Research
b. data
c. hypothesis
d. the conclusion
b. data
Experiment: I want to see which kind of dog food my dog will eat the most of. So, I give him a different kind of dog food each week for 4 weeks and weigh how much food he leaves in his bowl. What is the Dependent variable in this experiment?
How much food the dog leaves behind/ how much he eats
The independent variable goes on the __-axis and the dependent variable goes on the __-axis.
Independent: x, Dependent: y
inference
Classify the following units as SI or imperial units.
1. inches
2. kilograms
3. liters
4. gallons
imperial, SI, SI, imperial
When measuring the amount of liquid in a graduated cylinder, you must read the measurement from the ______ of the meniscus.
Bottom
Experiment: I want to see which kind of dog food my dog will eat the most of. So, I give him a different kind of dog food each week for 4 weeks and weigh how much food he leaves in his bowl. What are at least 2 CONSTANTS I would need to have?
same type of bowl, same amount of food given, same amount of activity each day, same amount of attention given to the dog
A ______ is a factor in an experiment, a ______ tells how that factor is being measured (inches, feet, seconds, etc.)
Variable, unit
Observation or Inference: based on the five senses.
Give two examples.
Observation (examples vary)
Convert:
20 mm = ___ cm
3 L = ___ kL
2 cm, .003 kL
I plant four tomato plants in the same size pots, give them the same amount of water and sunlight, and use the same type of seed and soil. To three of the plants, I give three different kinds of fertilizer. One does not get any fertilizer. What is the control group in this experiment?
the plant that is not given fertilizer