1) In an investigation, 50 mL of sand is placed in one glass beaker and 50 mL of water is poured into a second glass beaker. Temperature probes in the sand and the water are used to record the temperature of each type of matter. The beakers are then placed under two lights. What is the independent variable? a) The change in temperature. b) The size of the light bulb. c) The type of matter in the beakers. d) The size of the beakers. 2) In an investigation, 50 mL of sand is placed in one glass beaker and 50 mL of water is poured into a second glass beaker. Temperature probes in the sand and the water are used to record the temperature of each type of matter. The beakers are then placed under two lights. What is the dependent variable? a) The change in temperature. b) The size of the light bulb. c) The type of matter in the beakers. d) The size of the beakers. 3) A student is conducting an investigation to find out which food his dog likes best. What is the independent variable in his investigation? a) The color of his dog’s food dish b) The kind of food he gives his dog c) The amount of food his dog eats d) The time of day he feeds his dog 4) A student is conducting an investigation to find out which food his dog likes best. What is the dependent variable in his investigation? a) The color of his dog’s food dish b) The kind of food he gives his dog c) The amount of food his dog eats d) The time of day he feeds his dog 5) A experimental investigation begins with a question. Next, the investigator predicts an answer to the question. This prediction is called the— a) hypothesis b) conclusion c) data d) procedure 6) Which of the following is the testable question for an experimental investigation? a) What is the freezing point of salt water? b) How fast can hummingbirds flap their wings? c) What is the mass of a glass beaker filled with 500 mL of water? d) How does changing the height of a ramp affect the distance a toy car travels? 7) The information gathered during an investigation is called— a) hypothesis b) data c) conclusion d) control variable 8) Which of these questions could be answered from the results of the investigation pictured a) Does shape affect which cheese a mouse likes best? b) How fast will it take the mouse to find a piece of cheese in a maze? c) Which type of cheese does a mouse prefer: cheddar or Swiss? d) Can the mouse see the Swiss cheese better? 9) Students were planning an experimental investigation. They wrote down a testable question. What would be the next step in their investigation?  a) Complete the experiment b) Formulate a hypothesis c) Draw a conclusion d) Analyze collected data 10) In an investigation, Jackson tested to see how the size of rocks affects the amount of dirt that washes away when water flows downhill. What is the independent variable? a) size of rocks b) types of dirt c) slope of the hill d) the amount of the water 11) Three baseball players investigate to see who can throw a baseball the farthest. They mark off an area on the playground for their investigation. Which should they keep constant? a) Spot from which players throw b) Height of players c) Order in line d) Color of baseball 12) Students observed the pictured set-up for their investigation. Which question would the students most likely try to test with this set-up? a) Does the height of the ramp affect the distance the car will roll? b) Does the color of the cars affect how fast the cars roll down the ramp? c) Does the mass of the cars affect how fast the cars roll down the ramp? d) Does the surface affect how fast the cars roll down the ramp? 13) The group that is left alone and not expermented on is known as the a) control group b) experimental group c) investigative group 14) The group that shows the effect of the variable being tested is known as the a) control group b) experimental group c) investigative group 15) A student wants to study the effect of sunlight on plant growth. In his experiment, all 12 plants receive normal light through a window during the day, but 12 of them are placed under a sun lamp at night while the other 12 are not. 6 weeks later, the height of the plants is measured. What is the independent variable?  a) the height of the plants b) the amount of light c) the 12 plants under the sun lamp at night d) the 12 plants not under the sun lamp at night 16) A student wants to study the effect of sunlight on plant growth. In his experiment, all 12 plants receive normal light through a window during the day, but 12 of them are placed under a sun lamp at night while the other 12 are not. 6 weeks later, the height of the plants is measured. What is the dependent variable?  a) the height of the plants b) the amount of light c) the 12 plants under the sun lamp at night d) the 12 plants not under the sun lamp at night 17) A student wants to study the effect of sunlight on plant growth. In his experiment, all 12 plants receive normal light through a window during the day, but 12 of them are placed under a sun lamp at night while the other 12 are not. 6 weeks later, the height of the plants is measured. What is the control group??  a) the height of the plants b) the amount of light c) the 12 plants under the sun lamp at night d) the 12 plants not under the sun lamp at night 18) A student wants to study the effect of sunlight on plant growth. In his experiment, all 12 plants receive normal light through a window during the day, but 12 of them are placed under a sun lamp at night while the other 12 are not. 6 weeks later, the height of the plants is measured. What is the experimental group??  a) the height of the plants b) the amount of light c) the 12 plants under the sun lamp at night d) the 12 plants not under the sun lamp at night

Recognizing parts of Experimental Design

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