Science Experiments
Oxygen’s Journey
Cellular Respiration
Exercise & Homeostasis
Photosynthesis & Carbon Cycling
100
What do we call the testable assumption we predict before starting an experiment?
Hypothesis
100
This liquid tissue carries oxygen through the body.
Blood
100
This output provides cells with usable energy.
ATP
100
During exercise, this response cools the body by releasing water onto the skin.
Sweating
100
What are the inputs of photosynthesis?
Carbon dioxide and water (+ sunlight)
200
In an experiment testing how the amount of sugar affects yeast respiration, this is the variable the scientist purposely changes.
Independent Variable
200
This body part pumps oxygen to the entire body.
The heart
200
Which of the two types of cellular respiration produces more ATP, so we use it for daily activities?
Aerobic cellular respiration
200
The body’s ability to keep internal conditions stable is called this.
Homeostasis
200
Do plants do cellular respiration, photosynthesis, or both?
Both
300
Students test yeast with sugar and yeast without sugar. The setup without sugar serves this role in the experiment.
Control group
300
Where does oxygen enter the bloodstream? (You need both answers for full points)
Alveoli and capillaries
300
What are the inputs of cellular respiration?
Oxygen and glucose
300
This type of biological mechanism detects a change and produces a response that returns the body toward normal.
Negative feedback loop
300
Which chemical is responsible for capturing sunlight when a plant does photosynthesis?
Chlorophyll
400
When dropping food coloring into a cup of water, what process explains the way the food coloring spread?
Diffusion
400
What is the body system of the network of organs and tissues that allows you to breathe called?
The respiratory system
400
______________ is the amount of extra oxygen the body requires to recover to a resting state after strenuous exercise.
Oxygen debt
400
Besides ATP, what is the other output of anaerobic respiration?
Lactic acid
400
This carbon-cycle process occurs when dead organisms are broken down.
Decomposition
500
As x ______________, y _____________.
As x increases, y decreases.
500
Place the direction that oxygen travels to cells:
Lungs-Capillaries-Red blood cells-Mouth-Heart-Alveoli
Mouth-Lungs-Alveoli-Capillaries-Red blood cells-Heart
500
A runner’s cells receive plenty of glucose but no oxygen. What form of cellular respiration must takeover?
Anaerobic cellular respiration
500
Put these parts of a negative feedback loop in the correct order:
Response — sensor — return to balance — signal
sensor → signal → response → return to balance
500
Assume you were a climate scientist. What step would you take to reduce carbon emissions?
Answers vary. ie. re-reforestation, electric vehicles, etc.