DCSS 7th Science 2011 (DCSS7th2011)

Transcription

Name:_____________________________________________
Date:________________________
1. A caterpillar eats an oak leaf. Which of the following best describes the energy transfer in this situation?
A. Both the caterpillar and the leaf gain energy.
B. Energy is transferred from the leaf to the caterpillar.
C. Decomposers in the leaf obtain energy from the caterpillar.
D. The oak tree gains energy when the caterpillar eats the leaf.
This online assessment item contains material that has been released to the public by the Massachusetts Department of Education.
2. All organisms classified in kingdom Animalia must also be classified as which of the following?
A. Archaea
B. Eubacteria
C. Eukaryota
D. Protista
This online assessment item contains material that has been released to the public by the Massachusetts Department of Education.
3. Which is true of both mitosis and meiosis?
A. Each process occurs in every type of cell.
B. Each produces cells with half the number of chromosomes.
C. Each process begins by copying the DNA in the nucleus.
D. In each process, the cells produced are identical to the original cell.
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4.
These birds all live in Virginia. One of the bird's main sources of food is the nectar inside long,
trumpet-shaped flowers. A second bird eats mostly rodents. The third bird often is seen pecking into the bark
of the local trees to get the insects just inside. Which of the following lists has correctly matched the pictured
birds with their diets?
A. Ruby-throated Hummingbird–nectar; Red-tailed Hawk–insects; Yellow-bellied Sapsucker–rodents
B. Ruby-throated Hummingbird–insects; Red-tailed Hawk–nectar; Yellow-bellied Sapsucker–rodents
C. Ruby-throated Hummingbird–rodents; Red-tailed Hawk–nectar; Yellow-bellied Sapsucker–insects
D. Ruby-throated Hummingbird–nectar; Red-tailed Hawk–rodents; Yellow-bellied Sapsucker–insects
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© Virginia Department of Education
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5. In the picture of a cell below, which label indicates the part of the cell that contains most of the cell's
genetic material?
A. 1
B. 2
C. 3
D. 4
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6. Which of the following is the simplest biological unit?
A. the cell
B. the organ
C. the tissue
D. the organism
7. Five hundred grasshoppers of one species were sprayed with a new insecticide. Twenty-four hours later nearly all
the grasshoppers were dead. A few, however, survived. This outcome illustrates which one of Darwin's key ideas?
A. There are variations among individuals within a species.
B. Animals adapt to new environments.
C. All living things come from pre-existing living things.
D. New species develop from survivors.
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8.
This key can be used to identify the species of some wildflowers found in Virginia. All of the plants have blue
or purple flowers with five petals that are fused together. According to this key, to what species does the plant
shown belong?
A. Viper's bugloss (Echium vulgare)
B. Virginia bluebell (Mertensia virginica)
C. Gray beardtongue (Penstemon canescens)
D. Lyre-leaved sage (Salvia lyrata)
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9. Which describes a major difference among the birds shown below?
A. Some of the birds have not evolved wings.
B. Their feathers are all constructed differently.
C. Some of the birds are not able to lay eggs.
D. Each beak is adapted to its food source.
10. The "control center" of a cell is the
A. cell membrane.
B. cytoplasm.
C. nucleus.
D. cell wall.
11. Specialized cells that are similar in structure and function are usually joined together to form
A. tissues.
B. organs.
C. systems.
D. organisms.
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12.
A student used a thermometer to take his temperature at different times. He wrote down his measurements in
a table. When did the student most likely record the temperature inaccurately?
A. After getting up in the morning
B. After reading a book
C. After math class
D. After playing outside
13. Michelle finds pieces of her hair in her brush. Why is she still able to grow more hair?
A. Her body makes new cells.
B. Her body makes cells stretch.
C. Her body fills cells with food.
D. Her body fills cells with water.
14. Many animals in prehistoric times were much larger than those that exist today. How did a larger body size aid in
their survival during the colder climates of that time?
A. They needed less food.
B. They needed less water.
C. It helped them run faster.
D. It regulated body temperature.
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15. What most likely happened to species that are found in the fossil record but have no living members?
A. They had offspring of a different species.
B. They mutated to other species.
C. They became extinct.
D. They never really existed.
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16. How much genetic material is found in a cloned cell as compared to the original cell?
A. twice as much
B. the same amount
C. half as much
D. one-fourth as much
17.
According to the diagram, during the last 40 million years, the structure of the horse's foot has —
A. lost its toes.
B. become smaller.
C. grown toes.
D. remained the same size.
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18. Blood is considered a tissue because blood —
A. flows inside arteries and veins.
B. is necessary to carry oxygen and nutrients to the cells.
C. is pumped from the heart and is carried to the cells through arteries.
D. is composed of red and white blood cells working together and having specific functions.
19. What do ferns have that apple trees do not have?
A. Stems
B. Roots
C. Flowers
D. Spores
20.
This fern plant has rows of little black dots on the back of the leaves. These little dots are not harmful. They
hold millions of tiny reproductive cells called —
A. pistils
B. anthers
C. spores
D. chloroplasts
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21.
According to the identification key, what type of creature is creature Y?
A. Woznat
B. Zapoom
C. Nanner
D. Ock
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22. Sponges are classified as animals because they cannot —
A. move from place to place.
B. make their own food.
C. get rid of waste products.
D. catch their own food.
23. Photosynthesis in green plants requires four things. Three of the requirements are water, chlorophyll, and carbon
dioxide. What is the fourth requirement?
A. soil
B. rain
C. light
D. fertilizer
24.
Which concept is best illustrated by this diagram?
A. The exchange of CO2 and O2 in an ecosystem
B. The effect of limiting factors in a biome
C. Cycling of nutrients in a community
D. Environmental pressures on a population
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25. When plants undergo photosynthesis, they produce —
A. carbon dioxide.
B. oxygen.
C. hydrogen.
D. nitrogen.
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26.
In order for energy to flow through this food web from the sun to the yellow perch, the perch must —
A. live in warmer areas of its habitat.
B. eat pond grass and algae.
C. go through the process of photosynthesis.
D. eat the valve snail or the mosquito larva.
27.
In which part of a tree does photosynthesis take place?
A. bark
B. flowers
C. leaves
D. roots
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28. Which systems are involved in throwing a ball?
A. skeletal, muscular, and nervous systems
B. digestive, endocrine, and immune systems
C. nervous, immune, and respiratory systems
D. immune, digestive, and integumentary systems
29.
Look at the picture above, which shows some of the organs that can be found inside the human body.
What is the main job of the organ labeled 1?
A. Carrying air
B. Carrying food
C. Carrying blood
D. Carrying messages from the brain
National Center for Education Statistics, U.S. Department of Education
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30. Which of these best completes the statement about the interaction of the respiratory system with the
circulatory system? The lungs add —
A. nutrients to the blood
B. bile to the blood
C. oxygen to the blood
D. carbon dioxide to the blood
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DCSS 7th Science 2011 (DCSS7th2011)

Transcription

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