1. You want to determine how much water is lost from fully or semi-opened faucet. Which of the following will be your independent variable?
a. water
b. the amount of time to collect water
c. opening of the faucet (semi- or fully opened)
d. the amount of water collected (measured in milliliters) after 1 minute
12. You notice that when you prepared instant coffee for your mother, you had difficulty dissolving the granules in water, which was not hot enough. You wonder if increasing the temperature of the water will also increase its capacity to dissolve the granules. To conduct your investigation, you should keep the following factors constant except the _______
a. temperature
b. kind of 3-in-1 coffee
c. stirring of the mixture
d. amount of water to be heated
13.You want to know which types of candles bought from the supermarket burn faster .Which of the following will be your dependent variable?
a. the types of candle
b. amount of wind flowing in the experimental area
c. the ruler used to measure the height of the candle
d. the height of the candle measured every 2 minutes within a 10-minute period
14. Fair testing in an experiment means that __________
a. you change all variables
b. you do not change anything at all and keep all conditions the same
c. you change only one variable at a time and keep everything else constant
d. none of the above
15. Which of the following is an example of a fair test?
a. To test the effect of water on plants, you use two similar setups (Setup A and Setup B) and water the plants only in Setup A.
b. To test the effect of light on the growth of plants, you expose Setup A (mung beans) to light and keep Setup B (potato spuds) in a dark room.
c. To test the effect of light on the growth of mung beans, you expose Setup Aand Setup B to the same amount of light, but you introduced water to Setup A.
d. To test the effect of fertilizers on the growth of plants, you introduce fertilizers to Setup A (mung beans) and do not introduce ferilizers in Setup B. (potato spuds)