Scientific Method Question Preview (ID: 28963)
Introduction To Scientific Method.
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The ball was a measured mass of 113 grams. This statement is
a) inference
b) explanation
c) prediction
d) observation
Jacob investigated chemical reaction by recording the color, smell and release of bubbles. What type of evidence did Jared use?
a) qualitative observation
b) calculation
c) measurement
d) quantitative observation
Which of these statements is a hypothesis?
a) Flossing has been proven to reduce cavities in children's teeth.
b) Many infectious diseases are caused by bacteria.
c) Generally anything that removes bacteria from your mouth is a good thing.
d) If I floss my teeth daily then I should get less cavities than someone who does not floss his teeth.
Two students think that winter thunderstorms are always followed by snow. How could they test their hypothesis?
a) Measure the snowfall after the first thunderstorm.
b) Look at weather data for the past week.
c) Download a video on thunderstorms to watch.
d) Analyze winter weather data for the past five years.
A student finishes her lab report saying. The mean average temperature in Louisville in June is 82 degrees. This statement is
a) a prediction
b) an opinion
c) a conclusion
d) a hypothesis
Jenna flips a coin 10 times. Seven times it landed on heads and three times it landed on tails. Jenna concludes that coins always land on heads more than tails. Jenna might be wrong because
a) Her sample size is too small to be valid.
b) It violates Newton's third law of motion.
c) She should only flip the coin twice.
d) She did not state a hypothesis.
Students were investigating cleaners. They cleaned 5 desks in the classroom with a different brand of cleaner. One desk was not cleaned at all. What is the control for this experiment?
a) The desk that had the most bacteria.
b) The desk that was not cleaned.
c) the amount of time between cleaning the desks and testing for bacteria
d) the 5 different brand of cleaners.
Students shoot a marble across a spring with a spring loader plunger. They use a different amount of force each time. They measure how far the marble rolls.What is the dependent variable?
a) the mass of the marble
b) the amount of friction from the floor
c) the amount of force in the spring
d) how far the marble rolls.
A student wants to see if different colored boxes are the same temperature when placed in the sun. What is the dependent variable?
a) the size of the boxes
b) the number of trials
c) the color of the boxes
d) the temperature of the boxes
A gardener wants to know if fertilizer will make his roses grow taller. Which plant would be the CONTROL in this experiment?
a) a rose plant that gets water and sunlight but NO fertilizer
b) a rose plant that get water, sunlight, and fertilizer
c) a rose plant that gets water and fertilizer but is placed in a closet with no light.
d) a rose plant that gets sunlight anf fertilizer but no water.
On the first trial a student rolls a car down a ramp and measures how far it rolls. On the second trial he doubled the height of the ramp and adds sandpaper to give it more friction. Why is this experiment invalid?
a) The student did not know how to calculate speed.
b) The student should have stopped after the first trial.
c) The experiment does not have a control.
d) The experiment tested more than one variable.
A student want to find a plant that will survive in a hot, dry climate. Shee plants four different plants in the desrt and measures their growth each week. What is the independent variable?
a) the amount of water
b) the type of plant
c) the amount of sunlight
d) the height of the plant
After performing an experiment, what should a scientist do to make sure his findings are correct?
a) Make sure the experimented can be repeated with the same results.
b) Change a different variable and see if he gets the same result.
c) Ignore any results that don't match his hypthesis.
d)
A student wants to discover how much water is needed for a potato plant to grow. What is the independent variable?
a) the temperature
b) the amount of sunlight
c) the amount of water each plant receives
d) the type of soil
A frog was hungry. It saw a green bug. I bet that bug will taste good, thought the frog. With a flick of its tongue the frog ate the bug. Yuck! said thee frog. That bug tastes gross. What was the frog's hypothesis?
a) The frog was hungry.
b) I bet that bug will taste good.
c) The frog ate the bug.
d) That bug tastes gross.
A well-designed experiment should have a hypothesis.
a) true
b) false
c)
d)
Which statement about the kittens is an inference?
a) The kittens have fur.
b) The kittens have many colors.
c) The kittens are in a field of yellow flowers.
d) The kittens are related.
A frog was hungry. It saw a green bug. I bet that bug will taste good, thought the frog. With a flick of its tongue the frog ate the bug. Yuck! said thee frog. That bug tastes gross.What was the frog's problem?
a) The frog was hungry.
b) That bug will taste good.
c) The bug tasted yucky.
d)
A frog was hungry. It saw a green bug. I bet that bug will taste good, thought the frog. With a flick of its tongue the frog ate the bug. Yuck! said thee frog. That bug tastes gross. What was the test?
a) The frog was hungry.
b) The frog ate the bug.
c) I bet that bug will taste good.
d) The bug tasted gross.
A frog was hungry. It saw a green bug. I bet that bug will taste good, thought the frog. With a flick of its tongue the frog ate the bug. Yuck! said thee frog. That bug tastes gross. What is the conclusion?
a) The frog was hungry.
b) I bet that bug will taste good.
c) The frog ate the bug.
d) The bug tasted yucky.
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