Variables
The variables that stay the same in an experiment.
What are control variables or constants?
I notice that a paper airplane made of construction paper flies really far.
Does the type of paper affect how far a paper airplane flies?
Does eating peanuts affect the size egg chickens lay?
If chickens ate more peanuts, then their eggs would be larger.
In your conclusion you must include a CER. CER stands for ________________
What is claim, evidence, reasoning?
Scientists use their 5 sense to do this:
A. Infer
B. Predict
C. Observe
What is C. Observing
A(n) ____________________ is the variable that is changed or altered in an experiment.
What is the Independent Variable?
Tulip bulbs bloom in the spring time when it starts to get warmer.
Does the temperature affect tulip bulbs?
Does the temperature affect tulip bulbs?
If I provide more heat to my tulip bulbs, then they will bloom before the tulip bulbs given less heat.
The first step of the scientific method includes this ________________.
A. Hypothesis
B. Observing
C. Conclusion
What is B. Observing?
Finding the length of a caterpillar is 4.5 centimeters is a _____________ Observation
What is Quantitative Observation
In the tennis ball lab, you tested how dropping the ball from different heights affected it's bounce. _________ is the dependent variable.
What is the bounce of the ball?
Some apples from the store have a spray on them. I wonder if that harms the apples.
Does insect spray affect the health of apples?
Does the type of oven affect the thickness of a pizza's crust?
If a pizza is baked in a brick oven, then it will have a thinner crust than if it was baked in a regular oven.
You collect _______ during an experiment and organize it using tables or graphs.
What is data/evidence?
How do scientists use observations to make inferences?
Observing means using one or more of your senses to gather information, using the information gathered you then make a prediction which is a statement or claim about what will happen in the future based on your past experience and evidence.
A(n) _______________________________ is a factor that changes as a result of a change in variables in an experiment.
My chickens ate peanuts last week and they laid bigger eggs this week!
Does eating peanuts affect the egg sizes of chickens?
Does the type of paper affect how far a paper airplane flies?
If a paper plane is made out of construction paper, then it will fly farther than if it was made out of newspaper.
BEFORE starting an experiment you must have written a ________________.
What is a hypothesis?
The cabinets are brown is an example of a _________ observation.
What is qualitative?
In the tennis ball lab, you tested how dropping the ball from different heights affected it's bounce. _________ is the independent variable.
What is the height the ball is dropped from?
The pizza that came out of the brick oven had a thinner crust.
Does the type of oven affect the thickness of a pizza's crust?
Does insect spray affect the health of apples?
If apples are sprayed daily with insect repellent, then the apples will be healthier than those apples without insect repellent.
Order the following statements
1. Judy puts 3 of the same plants in 3 different sized pots. Each plant gets the same water, sunlight, and soil. She measures the growth each day.
2. Judy notices that her plant in the big pot is growing taller than the same kind of plant in a smaller pot.
3. Judy finds that the plant in the smallest pot grew 3 inches, the medium sized plant grew 4 inches and the plant in the large pot grew 10 inches.
4. Judy asks "Does the size of the pot affect plant growth?"
5. Judy hypothesizes "If the plant is potted in a large plant, then it will grow taller than those in smaller pots."
6. Judy concludes that the size of a pot does affect plant growth.
2, 4, 5, 1, 3, 6
Why is it important to only have one independent variable in an experiment?
If you have more than one independent variable, you won't know what caused the dependent variable to change during the experiment.