Which of the following is not a variable in an investigation designed "how much light is needed for a spider plant to grow?"
A.type of plant
B.amount of water
C.source of light
D.amount of light
B?
Which of the following is the best investigation question?
A.Do heavier rocks fall faster than light rocks?
B.Why is the sky blue?
C.Which paper towel is better?
D.What is the best fertilizer for all plants?
B?
For the first question, "Which of the following is not a variable in an investigation designed 'how much light is needed for a spider plant to grow?'", the variables in an investigation are the factors that can be changed or manipulated. In this case, we are investigating how much light is needed for a spider plant to grow. The variables are typically the factors that can affect the outcome of the investigation.
A. type of plant - This could be a variable as different types of plants may have different light requirements.
B. amount of water - This could be a variable as the amount of water provided to the plant may also affect its growth.
C. source of light - This could be a variable as different sources of light (natural sunlight, fluorescent lights, etc.) may have different intensities that could impact the plant's growth.
D. amount of light - This could also be a variable as the amount of light provided to the plant can be controlled and varied.
Based on this, the correct answer would be A. type of plant, as it is not a variable specifically related to the investigation of how much light is needed for a spider plant to grow.
For the second question, "Which of the following is the best investigation question?"
A. Do heavier rocks fall faster than light rocks? - This question is a valid investigation question as it aims to compare the falling speed of heavier rocks versus lighter rocks.
B. Why is the sky blue? - This question is more of a scientific concept inquiry rather than a specific investigation question.
C. Which paper towel is better? - This question is more of a comparison question and may not be suitable for a scientific investigation without specifying the criteria for determining what makes a paper towel "better."
D. What is the best fertilizer for all plants? - This question is too broad and does not specify any particular plant or criteria for determining the best fertilizer.
Based on this, the correct answer would be A. Do heavier rocks fall faster than light rocks?, as it is a specific and testable question that can be investigated.