Question

name: ____alex____ candle lab make up
for each of the following experiments, identify:
a. the manipulating/independent variable
b. the responding/dependent variable
c. the control experiment
d. 3 controlled variables

1. an experiment was done to determine if the time it takes to run a kilometer depends on the amount of exercise a person gets.

a.
b.
c.
d.

1. an experiment was done to determine if the higher the temperature of water, the faster an egg will cook.

a.
b.
c.
d.

1. an investigation was done to see if keeping the lights on for different amounts of time each day affects the number of eggs chickens laid.

a.
b.
c.
d.

1. an experiment was done to determine if the temperature of water in a lake varied at different depths.

a.
b.
c.
d.

1. an experiment was done to determine if the amount of pollution produced by cars was affected by the amount of lead in the gasoline those cars used.

a.
b.
c.
d.

1. an experiment was done to determine if lemon trees receiving the most water produce the largest lemons.

a.
b.
c.
d.

1. five groups of rats are fed identical diets except for the amount of vitamin a that they receive. each group gets a different amount of vitamin a. after 3 weeks on the diet, the rats are massed (weighed) to see if the amount of vitamin a received has affected their mass.

a.
b.
c.
d.

1. which fruit contains the most vitamin c?

a.
b.
c.
d.

Explanation:

Problem 1:

a.

Step1: Identify independent variable

The independent variable is what's manipulated. Here, it's the amount of exercise.

Step1: Identify dependent variable

The dependent variable is what's measured. Here, it's time to run a kilometer.

Step1: Define control experiment

A control would be a group with no exercise (or a standard amount) to compare.

Answer:

a. Amount of exercise

b.