Name ________________________________
1. Carmen conducted an experiment to determine if listening to different types of music would affect a person's pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person's pulse was taken before the music and then after each 30 second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person's pulse rate changed when the person listened to different types of music.
Which component is missing from Carmen's experiment?
O a. a question
O b. a hypothesis
O c. a control group
O d. a description of the experiment
2. Which technological advance was aided by studying how bats locate objects using sound waves?
O a. 3-D computer modelling
O b. sonar navigation for submarines
O c. x-ray for analyzing body structures
O d. night-visiion goggles for military operations
Which of the following is the best explaination of this?
O a. The ocean warms the air above it.4. Melaleuca, a tree native to Australia, was introduced into south Florida in the early 1900s. It currently grows in south Florida along roadsides and ditches, on lake shorelines, and in marshes. These trees have reduced the available resources for native plant populations because it quickly spreads and requires large amounts of fresh water.
O b. The ocean cools the air above it.
O c. The ocean radiates heat more slowly than the landmass, moderating the temperature of coastal landmasses.
O d. The ocean radiates heat faster than the landmass, moderating the temperature of coastal landmasses.
The state of Florida is considering introducing insects that feed on Melaleuca trees in Australia. Which of the following is the major problem with this idea?
O a. Importing the Australian insects will be very expensive.5. The nonpoisonoous eastern scarlet snake has colored bands that closely resemble the poisonous coral snake. This selective adaptation provides the eastern scarlet snake with
O b. The Australian insects will have no natural predators here and their population will grow unchecked.
O c. The Australian insects may not eat Melaleuca trees in the US.
O d. US birds may be poisoned by eating the Australian insects.
O a. increased breeding opportunities
O b. a method of avoiding predation
O c. the ability to attract prey
O d. increased feeding opportunities
6. Catalysts may reduce the amount of activation energy required for a chemical reaction to occur. Platinum (Pt) is a catalyst that is used in catalytic converts in automobiles. In these graphs, pathway x is a solid line representing the uncatalyzed reaction. The dotted line shows the catalyzed reaction. Which graph best illustrates the changes in a reaction when the catalyst reduces the amount of energy required?
O a. graph A
O b. graph B
O c. graph C
O d. graph D
7. Mike and his lab partner, Maria, collected data on their respiratory rates while performing different activities. This table shows their averages. The data in the table show a higher respiratory rate for increased activity. Which statement below explains this relationship?
O a. Muscles require more glucowse to be delivered to them as their energy source.
O b. Muscles require more hemoglobin to be delivered to them as their energy source.
O c. Muscles require a greater amount of oxygen, O2, in order to break down glucose to do work.
O d. Muscles require a greater amount of carbon dioxide, CO2, to break down glucose to do work.
8. When brown tree snakes were first introduced to the island of Guam, they had no natural predators. These snakes sought out and ate many of the eggs of insect-eating birds. What probably occured after the introduction of the brown tree snakes?
O a. The bird population increased.
O b. The insect population increased.
O c. The bird population began to seek a new food source.
O d. The insect population began to seek a new food source.
9. Cells are the functional units that make up tissues. Tissues then become the functional units that make up
O a. enzymes
O b. organs
O c. other cells
O d. DNA