A. Break Down the Remains of Other Organisms

S.7.SCA.5TH.TEST1.11-12 [5919]

Student

Class

Date

1. Soil organisms, fungi, worms, and bacteria, are all organisms in an ecosystem that -

A. break down the remains of other organisms

B. remove nitrogen from the soil

C. help dissolve oxygen in the groundwater

D. pass on the Sun’s energy to plants

1. Some species of wildflowers in grassland areas have flexible, flat leaves, while some species of grass have sharp leaves and thorns. What advantage might a grass with sharp leaves and thorns have over wildflowers with flexible flat leaves?

A. attracting sunlight

B. cooling the plants

C. discouraging consumers

D. storing water

1. Some plants wilt during the hottest part of the day. This most likely helps the plant by –

A. using less oxygen

B. making more food

C. resting the plant

D. conserving water

1. Which statement best describes the flow of energy in a food web?

A. Energy is shared equally among the organisms.

B. Energy is lost at each level of a food web.

C. Energy flows from larger organisms to smaller organisms.

D. Energy is gained at each level of the food web.

Note the circled organisms in the food web below.

1. Which statement best describes the difference in the roles of the organisms circled in the food web above?

A. Producers make their own food; consumers cannot.

B. Producers compete for food; consumers cannot.

C. Consumers make their own food; producers cannot.

D. Producers can avoid being eaten; consumers cannot.

1. Based on the information in the table above, which of the following is most likely true?

A. A plant would dry up without stomata.

B. Stomata are able to open and close.

C. Nitrogen and oxygen are carried by xylem.

D. Plants contain more xylem than phloem.

1. The leaves of the touch-me-not-plant, Mimosa pudica, fold when they are touched. A plant folding its leaves when touched is an example of response to a(n) –

A. lack of stimuli

B. over stimuli

C. external stimuli

D. internal stimuli

Compare the food web and food chain below.

1. Food webs provide a more complete picture of interactions in an ecosystem because –

A. many animals have more than one food source

B. how much an animal eats depends on its size

C. competition within a population can be observed

D. animal behavior can be observed

1. Which of the following most likely belongs at letter X in the food web above?

A. Bat

B. Flea

C. Vulture

D. Plant

1. Which energy transformation occurs during the process of photosynthesis?

A. Nuclear to mechanical

B. Chemical to sound

C. Light to radiant

D. Radiant to chemical

1. In the diagram above, which of the following correctly describes the amount of energy available at A and B?

A. A= most amount of energy B= least amount of energy

B. A= least amount of energy B= most amount of energy

C. A and B= same amount of energy

D. A and B= infinite supply of energy

1. In the food chain diagrams above, which one shows the correct direction of energy flow?

A. 1

B. 2

C. 1 and 2

D. Neither

1. What is a producer?

A. An organism that eats consumers to obtain energy.

B. An organism that breaks down plant and animal remains and waste.

C. An organism that provides energy to the Sun.

D. An organism that transforms the energy of the Sun to make food.

1. Organisms that capture and store solar energy in carbon containing compounds such as glucose are -

A. Consumers

B. Carnivores

C. Decomposers

D. Producers

1. Which of these activities releases carbon dioxide into the atmosphere?

A. Photosynthesis

B. Precipitation

C. Solar radiation

D. Respiration

1. Which of these molecules is produced when glucose is broken down?

A. Sucrose

B. Water

C. Carbohydrates

D. Carbon dioxide

1. The organisms responsible for the breakdown of matter indicated by the letter “X” in the diagram above would include:

A. Animals and plants

B. Plants and bacteria

C. Bacteria and fungi

D. Fungi and plants

1. Which of the following are consumers found in the food web?

1. Fox, grass, and hawk
2. Grass, rabbit, and fox
3. Rabbit, hawk, and fox
4. Rabbit, hawk, and bacteria

1. Which two organisms compete for the same food source?

1. Rabbit and fox
2. Shrew and rabbit
3. Bacteria and grass
4. Hawk and fox

1. What word should fill in box X in the diagram of the carbon cycle below?

1. Decomposition
2. Photosynthesis
3. Digestion
4. Phototropism