ID Variables
Mia wants to know if the amount of sunlight a plant recrieves affects how tall it will grow. What is the independent variable?
A. Height of the plant
B. Amount of sunlight
C. Type of plant
D. Amount of water
What is B. Amount of sunlight
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What is positive and linear?
Which of these is a formal hypothesis?
A. Plants are interesting.
B. If a plant gets more sunlight, then it will grow taller because sunlight helps plants make food.
C. Plants need sunlight because they need to live.
What is B. If a plant gets more sunlight, then it will grow taller because sunlight helps plants make food.
Ethan wants to see if studying for more minutes improves test scores. What is the dependent variable?
A. Number of minutes studied
B. Subject being studied
C. Test score
D. Number of students
What is C. Test score
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What is cluster?
Which statement is NOT a formal hypothesis?
A. If a person drinks more water, then they will visit the bathroom more often because the body must get rid of excess water.
B. If the temperature of water increases, then salt will dissolve faster because warmer water allows particles to move faster.
C. If students listen to music while studying, then their test scores will change because music affects concentration.
D. Students who listen to music while studying might do better.
What is D. Students who listen to music while studying might do better.
Sofia wants to know if different amounts of fertilizer affect how many flowers a plant produces. What is the independent variable?
A. Number of flowers
B. Type of plant
C. Amount of fertilizer
D. Height of the plant
What is C. Amount of fertilizer
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What is
Strongest: C
Middle: B
Weakest: A
A student wants to test whether the amount of fertilizer affects the number of leaves on a plant. Which is the BEST formal hypothesis?
A. If plants receive more fertilizer, then they will grow more leaves because fertilizer provides nutrients that support plant growth.
B. If plants have more leaves, then they probably received more fertilizer because fertilizer helps plants.
C. Plants with fertilizer will probably have more leaves.
D. Fertilizer is important for plants, so I think they will grow better.
What is A. If plants receive more fertilizer, then they will grow more leaves because fertilizer provides nutrients that support plant growth.
Jayden wants to find out if the temperature of water affects how quickly sugar dissolves. What is the dependent variable?
A. Temperature of the water
B. Amount of sugar
C. Time it takes the sugar to dissolve
D. Type of container
What is C. Time it takes sugar to dissolve
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What is no
Which statement looks like a formal hypothesis but is actually NOT one because the reason does not scientifically explain the prediction?
A. If students sleep longer, then their reaction time will improve because sleep helps the brain function properly.
B. If a ball is dropped from a greater height, then it will hit the ground faster because gravity pulls objects downward.
C. If students eat more vegetables, then they will have more energy because I saw a video saying vegetables are healthy.
D. If water temperature increases, then ice will melt faster because heat transfers energy to the ice.
What is C. If students eat more vegetables, then they will have more energy because I saw a video saying vegetables are healthy.
A scientist wants to determine whether the amount of exercise a person gets affects their heart rate. Which choice correctly identifies the independent and dependent variables?
A. Independent = heart rate; Dependent = amount of exercise
B. Independent = amount of exercise; Dependent = heart rate
C. Independent = age; Dependent = amount of exercise
D. Independent = heart rate; Dependent = age
What is B. Independent = amount of exercise; Dependent = heart rate
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What is no trend
A student writes:
"If students spend more time exercising, then their heart rates will be higher because Sunday is usually the day people exercise."
Why is this NOT a good formal hypothesis?
A. It does not have an independent variable.
B. It does not have a dependent variable.
C. The "because" statement does not scientifically explain the predicted relationship.
D. It cannot be tested.
What is C. The "because" statement does not scientifically explain the predicted relationship.