Mid-year Seventh Grade Life Science Exam

1. How are photosynthesis and respiration related?

They have opposite equations.

They have the same equation.

They both produce carbon dioxide.

They both produce oxygen.

2. During an experiment, if you purposely change the temperature to test a hypotheses, the temperature is called the ...

Manipulated variable

Responding variable.

Operational variable.

Dependent variable

3. Differences between members of the same species are called...

Predators

Selections

Traits

Variations.

4. The way in which people change the world around them to meet their needs or solve practical problems is called...

Science.

Technology

Feedback

Systems.

5. A branching tree is...

A diagram showing how scientists think different groups of organisms are related.

A species of tree that is not closely related to other tree species.

A drawing that shows where different animals live in a tree.

A homologous structure that many plants have.

6. When scientists create a representation of a complex process, they are...

Inferring

Predicting

Classifying

Making models

7. Which term refers to similar structures that related species have inherited from a common ancestor?

DNA sequences

Developmental organisms

Homologous structures

Punctuated equilibrium

8. A group of parts that work together is called a ....

Technology

System

Process

Feedback

9. What did Darwin observe about finches in the Galapagos Islands?

Their feathers were adapted to match their environment.

Their beaks were adaptations related to the foods the finches ate.

They had identical phenotypes in all locations.

They had identical genotypes in all locations.

10. What is the function of the cell membrane?

To support the cell

To perform different functions in each cell

To control what enters and leaves the cell.

To form a hard outer covering for the cell.

11. How does natural selection lead to evolution?

Stronger offspring kill weaker members of the species.

Helpful variations accumulate among surviving members of the species.

Overproduction provides food for stronger members of the species.

Environmental changes favor weaker members of the species.

12. Carbon dioxide enters plants through the ....

Pigments

Chloroplasts

Cholrophyll

Stomata

13. What is the first thing you should do if an accident occurs?

Find the emergency equipment.

Notify the teacher.

Go to the nearest hospital.

Start first aid treatment.

14. What happens during respiration?

Oxygen is released into the air.

Glucose is broken down, releasing energy.

Carbohydrates are released into the bloodstream

Water and carbon dioxide are converted into energy.

15. The gradual change in a species over time is called...

Mutation.

Evolution.

Migration.

Variation.

16. Which of the following is a valid reason why a scientist might reject a scientific theory?

Some people disagree with it.

It covers too broad a topic.

New evidence contradicts it.

It is too old.

17. What is the goal of technology?

To produce and deliver cereal.

To understand how the natural world functions.

To study the natural world.

To improve the way people live.

18. Which branch of science includes the study of magnetism?

Earth and space science

Life science

Physical science

Scientific literacy

19. One useful tool that may help a scientist interpret data by revealing unexpected patterns is a ....

Variable.

Graph.

Theory.

Law.

20. A species is a group of similar organisms that,,,

Can mate with each other and produce fertile offspring.

Can live together on an island.

Can migrate to an island from the mainland.

All have exactly the same traits.

21. Why do scientists organize living things into groups?

So they can find them in the wild more easily.

So that the organisms are easier to study.

So they can make sense of the variety of rocks on Earth.

So products from living things can be easily found in groceries.

22. How does a bacterial cell differ from a plant or animal cell?

It is larger.

It does not have a nucleus.

It has no cytoplasm.

It has no organelles.

23. An organized way to collect and recored scientific observations is with a(n)...

Model

Inference

Data table

Operational definition

24. What is one way in which scientists get information about the evolutionary history of species?

By comparing organisms' body structures.

By observing where organisms live

By observing what organisms eat

By studying how organisms move

25. What is the total magnification of a microscope with two lenses when one lens has a magnification of 15, and the other has a magnification of 30?

15

30

45

450

26. What is taxonomy?

The scientific study of how living things are classified.

The name of Aristotle's classification system.

The process used by geologists to classify rocks.

The process of observing an organism's behavior

27. What is the function of the cell wall?

To protect and support the cell

To perform different functions in each cell

To prevent water from passing trough it

To prevent oxygen from entering the cell.

28. Which branch of science includes the study of the stars?

Earth and space science

Life science

Physical science

Scientific literacy

29. When scientists put things into categories or group together items that are alike in some way, they are...

Infterring

Predicting

Classifying

Making models

30. An organism's scientific name consists of ...

Its class name and its family name

Its kingdom name an dits phylum name.

Its genus name and its species name.

Its phylum name and its species name.

31. What evidence suggests that the ancestors of whales once walked on land?

Scientists have found fossils of whale like creatures that had legs.

Whale perform walking motions as they swim,

Whales have similar DNA to elelphants

Whales breathe trough lungs.

32. Using one or more of your senses to gather information is called...

Observing

Inferring

Predicting

Classifying

33. Which is the broadest classification level?

Family

Domain

Phylum

Species

34. Which organelle is the control center of a cell?

Mitochondrion

Ribosome

Nucleus

Chloroplast

35. The gradual change in species over time is called ...

Taxonomy

Homeostasis

Evolution

Classification

36. An engineer is a ...

Person who studies plants.

Person trained to use both technological and scientific knowledge to solve practical problems.

Possible explanation for a set of observations or answer to a scientific question.

37. To survive on Earth, the first cells needed the ability to..

Take in oxygen from the atmosphere.

Make their own food.

Use chemicals in their surrounding for energy.

Combine to form multicellular organsims.

38. If two organisms look very similar during their early stages of development, this is evidence that the organisms...

Are not related.

Evolved from different ancestors.

Have exactly the same DNA.

Evolved from a common ancestor.

39. What are the products of photosynthesis?

Carbon dioxide and water

Oxygen and water.

Carbon dioxide and sugars.

Oxygen and sugars.

40. Which term refers to the movement of materials through a cell membrane by using the cell's energy?

Osmosis

Diffusion

Active transport

Passive transport

41. A change in an organism's surroundings that causes it to react is called....

A response

A stimulus

Energy

Development

42. The result or product of a process is called a(n)

Input

Output

Goal

Feedback

43. The regular cycle of growth and division that cells undergo is called...

Replication

The cell cycle.

Interphase.

Mitosis.

44. Which of the following do all living things need to survive?

Water

Oxygen

Sunlight

Carbon dioxide

45. A DNA molecule is shaped like a ...

Long, thin rod.

Spiral staircase

Straight ladder

Triple helix

46. What theory proposes that species evolve during short periods of rapid change?

Gradualism

Evolution

Absolute dating

Punctuated equilibrium

47. What happens during cytokinesis in animal cells?

A new round of mitosis begins.

Two new daughter cells are formed.

Each organelle divides into two parts.

A cell plate forms in the middle of the cell.

48. Darwin concluded that organisms on the Galapagos Islands...

Had changed over time.

Had remained the same.

Were the result of selective breeding.

Had no variations.

49. In science, a hypothesis must be

Correct

Manipulated

Controlled

Testable

50. Explaining or interpreting the things you observe based on reasoning from what you already know is called...

Observing

Inferring

Predicting

Classifying

51. What theory proposes that evolution occurs steadily in tiny changes over long periods of time?

Gradualism

Relative dating

Natural selection

Punctuated equilibrium

52. The more classification levels that two organisms share

The closer together on Earth they live.

The easier it is to them apart.

The more characteristics they have in common.

The more distantly related they are.

53. A trait that helps an organism survive and reproduce is called a(n)...

Mutation

Selection

Adaptation

Variation

54. Which term refers to the diffusion of water molecules through a selectively permeable membrane?

Osmosis

Engulfing

Active transport

Passive transport

55. The stage of respiration that releases most of the energy in glucose occurs in the....

Nucleus

Chloroplast

Cytoplasm

Mitochondria

56. Unlike the cell wall, the cell membrane...

Is found in all cells.

Is made of chromatin

Protects the nucleus with a rigid layer of cellulose.

Produces energy for the cell.

57. Which of the following statements is part of the cell theory?

Only plants are composed of cells.

All cells are produced from other cells.

Cells can be produced from nonliving matter.

Cells are one of several basic units of structure and function in living things.

58. The factor that may change in response to the manipulated variable is called the...

Hypothetical variable.

Responding variable.

Operational variable.

Independent variable.

59. Which domain(s) include(s) only prokaryotes?

Bacteria and Archaea

Bacteria only

Archaea only

Eukarya only

60. Making a forecast of what will happen in the future based on past experience or evidence is called ...

Observing.

Inferring.

Predicting.

Classifying.

61. What is copied during replication?

The cell's organelles

Chromosomes

The cell DNA

Two daughter cells.

62. What contribution of Charles Darwin had a major impact on classification?

Binomial nomenclature

Taxonomy

Seven levels of classification

Evolution

63. What theory agrees with fossil records that show no intermediate forms for long periods of time?

Gradualism

Natural selection

Evolution

Punctuated equilibrium

64. What did Darwin infer from his observations of organisms in South America and the Galapagos Islands?

The organisms on the Galapagos Islands were virtually identical to mainland organisms.

A small number of different plant and animal species had come to the mainland from the Galapagos Islands.

The organisms on the Galapagos Islands were completely unrelated to mainland organisms.

A small number of different plant and animal species had come to the Galapagos Islands from the mainland.

65. How long is Precambrian Time in the Geologic Time Scale?

4 million years

4.6 million years

4 billion years

4.6 billion years

66. A well tested explanation for a wide range of observations or experimental results is called a scientific ...

Inquiry

Hypothesis

Theory

Law

67. Trying to explain a solar eclipse is an example of ....

A prediction.

Drawing a conclusion

Scientific theory

Classification.

68. Observations that deal with a number or amount are called...

Manipulated observations.

Quantitative observations.

Qualitative observations.

Operational observations.

69. What is the role of genes in evolution?

Only genes can be acted on by natural selection.

Parents with recessive genes die from overproduction.

The genes of most surviving parents have only dominant alleles.

Only traits that are controlled by genes can be acted on by natural selection.

70. Observations that deal with descriptions that cannot be expressed in numbers are called...

Manipulated observations.

Quantitative observations.

Qualitative observations.

Operational observations.

71. Which of the following is an example of thinking scientifically about a topic?

Finding out how bicycles work.

Reading a consumer report about bicycles.

Evaluating the cost of bicycles.

Investigating the invention of bicycles.

72. An organism that makes its own food is called a(n)...

Heterotroph

Eukaryote

Autotroph

Prokaryote

73. Which branch of science includes the study of plants, animals and the human body?

Earth and space science

Life science

Physical science

Scientific theory

74. Mitosis is the stage of the cell cycle during which...

The cell's nucleus divides into two new nuclei.

The cell's DNA is replicated.

The cell divides into two new cells.

The cell's cytoplasm divides.

75. What are fossils?

Molds an dcasts of organisms that live today

Drawings of ancient animals and other organisms

Footprints or burrows of small animals that live today.

The preserved remains or traces of organisms that lived in the past.