Question

science variables coloring page

1. a scientist planted several identical seedlings in five groups. each group is exposed to a different amount of sunlight each day. in order to determine the effect (amount of sunlight) which of the following variables must be kept constant?

• growth rate (blue)
• amount of sunlight received (green)
• type of plant (red)

1. a student hypothesizes that green algae will grow fastest when exposed to blue light. to test this hypothesis, the student should design an experiment with which independent variable?

• color of light (light blue)
• amount of light per day (yellow)
• color of algae (red)

1. kendra is conducting an investigation to find out which food her dog likes best. which is the dependent variable in this investigation?

• color of the dog’s dish (brown)
• amount of food eaten (light green)
• the type of food given (pink)

1. cameron designed an experiment to determine which type of soil absorbs the most water. to ensure that experiment results in valid data, each container must...

• contain the same amount of soil (purple)
• contain soil from the same place (red)
• be tested by the same person (orange)

1. in an experiment, jackson tested to see how the size of rocks affects the amount of dirt that washes away when water flows downhill. which variable is the independent variable?

• amount of water (purple)
• type of dirt (brown)
• size of the rocks (orange)

1. two students wanted to find out which of their toy race cars would go the farthest down a ramp. which of these should be held constant if they want a fair test of their cars?

• height of the ramp (yellow)
• the weight of the ramp (red)
• the length of the cars (black)

1. you design an experiment to test the effect of temperature on bacterial growth. you use three bacteria cultures under three heat lamps at different temperatures. what is the dependent variable in this experiment?

• bacterial growth (red)
• temperature (yellow)
• length of the experiment (purple)

1. a student plans to conduct an experiment to determine how a change in the ph of water affects the population growth rate of algae. to ensure that her experimental data are valid, she should...

• vary the temperature (brown)
• hold the acidity constant (black)
• use the same species of algae (dark green)

1. a medical researcher hypothesizes that a new medication can reduce high blood pressure. which of these would most likely be the dependent variable in a study involving this medication?

• blood pressure of the group (dark blue)
• the ages of the group (yellow)
• the number in the group (red)

1. in an experiment about growth, some snapdragon seeds were placed in dishes lined with moist paper towels at differing temperatures. which of these is the independent variable in this experiment?

• the number of sprouts (blue)
• the type of seed (orange)
• the temperature (light green)

Answer:

To solve these science variable - related questions, we analyze each one by recalling the concepts of independent, dependent, and controlled variables in an experiment.

Question 1

• Explanation:
• Step 1: Identify the goal - We want to find the variable that must be held constant when testing the effect of sunlight on plant growth.
• Step 2: Analyze variables - The independent variable is the amount of sunlight (what we change), the dependent variable is growth rate (what we measure). The type of plant should be constant so that only sunlight affects growth. From the table, "type of plant" is colored RED.
• Answer: type of plant (RED)

Question 2

• Explanation:
• Step 1: Understand the hypothesis - The hypothesis is about green algae growing fastest under blue light.
• Step 2: Determine the variable to change - To test this, we need to change the color of light. From the table, "color of light" is colored LIGHT BLUE.
• Answer: color of light (LIGHT BLUE)

Question 3

• Explanation:
• Step 1: Recall dependent variable definition - The dependent variable is what we measure (depends on the independent variable). In a dog food preference test, we measure the amount of food eaten. From the table, "amount of food eaten" is colored LIGHT GREEN.
• Step 2: Confirm - The independent variable is the type of food, and the dependent is the amount eaten.
• Answer: amount of food eaten (LIGHT GREEN)

Question 4

• Explanation:
• Step 1: Goal of the experiment - To determine which soil absorbs the most water. We need to control other variables.
• Step 2: Identify the controlled variable - Each container must contain the same amount of soil. From the table, "contain the same amount of soil" is colored PURPLE.
• Answer: contain the same amount of soil (PURPLE)

Question 5

• Explanation:
• Step 1: Recall independent variable - The independent variable is what we change. Here, we change the size of rocks to see its effect on dirt washed away.
• Step 2: Find the variable - From the table, "size of the rocks" is colored ORANGE.
• Answer: size of the rocks (ORANGE)

Question 6

• Explanation:
• Step 1: Goal of the test - To have a fair test of toy race cars down a ramp, we need to control variables. The length of the cars should be constant (or other non - ramp - related car variables, but from the table, "the length of the cars" is colored BLACK). Wait, actually, for a fair test of the cars, the height of the ramp is the independent variable, but the variable to hold constant related to the cars is the length of the cars? Wait, no, maybe I misread. Wait, the question is which should be held constant for a fair test of their cars. So variables like the weight of the ramp (no), the height of the ramp (independent variable, we might change it), the length of the cars should be constant. From the table, "the length of the cars" is colored BLACK.
• Step 2: Confirm - To test which car goes farthest, we need to keep car - related variables (like length) constant.
• Answer: the length of the cars (BLACK)

Question 7

• Explanation:
• Step 1: Dependent variable definition - The dependent variable is what we measure, which depends on the independent variable (temperature here). We measure bacterial growth. From the table, "bacterial growth" is colored RED.
• Step 2: Confirm - Temperature is independent, bacterial growth is dependent.
• Answer: bacterial growth (RED)

Question 8

• Explanation:
• Step 1: Goal of the experiment - To determine the effect of pH on algae growth rate. We need to control other variables.
• Step 2: Identify the control - We should use the same species of algae. From the table, "use the same species of algae" is colored DARK GREEN.
• Answer: use the same species of algae (DARK GREEN)

Question 9

• Explanation:
• Step 1: Dependent variable in medical research - The dependent variable is what we measure (depends on the medication). We measure blood pressure of the group. From the table, "blood pressure of the group" is colored DARK BLUE.
• Step 2: Confirm - Medication is independent, blood pressure is dependent.
• Answer: blood pressure of the group (DARK BLUE)

Question 10

• Explanation:
• Step 1: Independent variable definition - The independent variable is what we change. In a seed growth experiment with different temperatures, the temperature is the independent variable. From the table, "the temperature" is colored LIGHT GREEN.
• Step 2: Confirm - We change temperature to see its effect on the number of sprouts (dependent variable).
• Answer: the temperature (LIGHT GREEN)