A
What skill is a scientist using when she listens to the sounds that whales makes.
A) interpreting data
B) making a hypothesis
C) drawing conclusions
D) making observations
D) making observations
Which of the following is NOT a rule when writing a hypothesis?
A) It is testable
B) It is an if/then statement
C) It is a prediction.
D) it should restate the question
D) it should restate the question
The process of obtaining information by using the senses is called a/an
observation
A series of steps designed to help you solve problems and answer questions
scientific method
Which question would be the best high level scientific question?
A) Does the amount of salt in water affect the temperature at which it boils?
B) Who made the first microscope?
C) How long ago did dinosaurs live on the Earth?
D) How many giraffes live in Africa?
A) Does the amount of salt in water affect the temperature at which it boils?
An experiment that tests only one factor at a time by using a comparison of a control group and an experimental
group is?
A) a controlled experiment
B) an independent variable
C) a theory
D) a dependent variable
A) a controlled experiment
In an experiment, the one variable that is changed is called the
independent variable
In an experiment, the factor that we measure is called the
dependent variable
All the things in an experiment that must be the same to make it fair are called
controlled variables or constants
In science, an educated guess is called a/an
hypothesis
When you decide whether or not the data supports the original hypothesis, you are
Drawing Conclusion
When a scientist shares her findings with other scientists, she is
communicating results
In which step of the scientific method do we want to use graphs
Analyze Data
A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact is a/an
experiment
If you wanted to know volume of water in a bottle of soda, you would use
A) kiloliters B) grams C) liters D) milliliters
C) liters
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the independent variable is
the amount of salt in the water
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the dependent variable is
the number of plants in the water
A scientist hypothesizes the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The dependent variable is
the gender of the baby alligators
Which of the following hypotheses is written correctly?
A) If I freeze a tennis ball, then it will not bounce as high.
B) Frozen tennis balls will not bounce as high.
C) If a tennis ball is frozen, it won't bounce as high as one that is not frozen.
D) If I heat up a tennis ball it will bounce high.
C) If a tennis ball is frozen, it won't bounce as high as one that is not frozen.
A scientist hypothesizes the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is
the temperature
Read the story below and then answer the questions.
Thandi baked a cake for her mother’s birthday. When she removed the cake from the oven, she saw that the cake had not risen, and wondered why this had happened. She guessed that the reason the cake had not risen was because she had used old baking powder. So Thandi designed an experiment to test her idea. She prepared two cakes – one using the identical ingredients she had used for the first cake, and the second cake, using all the same ingredients except for the baking powder. She used fresh baking powder from a new bottle. She put both cakes into the same oven for the same length of time. After the required time, she removed the cakes. What she saw puzzled her. Both cakes had failed to rise. Thandi thought that the baking powder was not the problem.
What were the results of Thandi’s investigation?
The two new cakes did not rise
Read the story below and then answer the questions.
Thandi baked a cake for her mother’s birthday. When she removed the cake from the oven, she saw that the cake had not risen, and wondered why this had happened. She guessed that the reason the cake had not risen was because she had used old baking powder. So Thandi designed an experiment to test her idea. She prepared two cakes – one using the identical ingredients she had used for the first cake, and the second cake, using all the same ingredients except for the baking powder. She used fresh baking powder from a new bottle. She put both cakes into the same oven for the same length of time. After the required time, she removed the cakes. What she saw puzzled her. Both cakes had failed to rise. Thandi thought that the baking powder was not the problem.
Did Thandi’s experiment have a control? If so, what was it? If not, comment on what she should have done.
The experiment did not have a control.
A control would have been to bake a cake without baking powder
Read the story below and then answer the questions.
Thandi baked a cake for her mother’s birthday. When she removed the cake from the oven, she saw that the cake had not risen, and wondered why this had happened. She guessed that the reason the cake had not risen was because she had used old baking powder. So Thandi designed an experiment to test her idea. She prepared two cakes – one using the identical ingredients she had used for the first cake, and the second cake, using all the same ingredients except for the baking powder. She used fresh baking powder from a new bottle. She put both cakes into the same oven for the same length of time. After the required time, she removed the cakes. What she saw puzzled her. Both cakes had failed to rise. Thandi thought that the baking powder was not the problem.
Was Thandi’s method fair?
In spite of not having a control, the experiment was fair – all variables were kept constant except for the baking powder.
Read the story below and then answer the questions.
Thandi baked a cake for her mother’s birthday. When she removed the cake from the oven, she saw that the cake had not risen, and wondered why this had happened. She guessed that the reason the cake had not risen was because she had used old baking powder. So Thandi designed an experiment to test her idea. She prepared two cakes – one using the identical ingredients she had used for the first cake, and the second cake, using all the same ingredients except for the baking powder. She used fresh baking powder from a new bottle. She put both cakes into the same oven for the same length of time. After the required time, she removed the cakes. What she saw puzzled her. Both cakes had failed to rise. Thandi thought that the baking powder was not the problem.
What was Thandi’s hypothesis?
The cake has not risen because the baking powder was old.
A scientist who wants to study the effects of fertilizer on plants sets up an experiment. Plant A gets no fertilizer, Plant B gets 5 mg. of fertilizer each day, and Plant C gets 10mg. of fertilizer each day. Which plant is the control group?
Plant A