Grade 7 IQWST EOC

1.

1 point

Sara is designing an experiment to determine how many times a cricket chirps within a given period of time. It is important for Sara to write the steps to her experiment clearly so

she does not introduce cultural bias.

the hypothesis can be supported.

the data can be carefully examined.

other scientists can conduct the experiment.

2.

1 point

The purpose of repeated experimental trials is to

supply data to record.

provide practice.

share the work.

validate conclusions.

3.

1 point

What is the main reason scientists from different fields often work together?

Data from one field often disprove data from another field.

By law, scientists must collaborate.

Most scientific projects involve more than one field of science.

It allows scientists to combine different scientific laws.

4.

1 point

The Human Genome Project identified the DNA sequence in humans. The project involved scientists from many different areas of science. Which of the following is most likely true about the scientists who worked on this project?

Only biologists and chemists were allowed to work on the project.

All the scientists involved had to understand biology.

It was important for each scientist to use the same research methodology.

Legal documents were required as evidence.

5.

1 point

Which of the following activities do scientists do to help them form scientific explanations?

Use subjective reasoning to form their conclusions.

Research information, design experiments, and make models.

Design experiments with personal bias.

Use opinions to evaluate their data.

6.

1 point

Directions: Use Figure 1 from the Diagram Sheet to answer the following question.

Mr. Reid’s students planted lima beans during a four-day span. Each plant was given the same amount of water and sunlight. The students measured the growth of the plants each day and collected the data for ten days. Which plant demonstrated the highest daily growth, given the plant’s age during the observation period?

red pot

yellow pot

green pot

blue pot

7.

1 point

Which scientific discovery caused a great deal of debate before it was accepted?

the idea that the sun is the main source of energy for life on Earth

the process of digestion in which food particles are broken down

the model of the universe in which Earth revolves around the Sun

the concept that matter is anything that has volume and mass

8.

1 point

Galileo’s discovery that Earth moves around the sun was controversial at the time because

the sun actually moved around Earth.

other scientists with more powerful telescopes disagreed with him.

his findings were not based on evidence.

his findings conflicted with the beliefs of society’s leaders.

9.

1 point

Directions: Use Figure 2 from the Diagram Sheet to answer the following question.

For which of the following purposes would the energy pyramid shown above be least useful?

developing a weed killer to control eelgrass

predicting the number of bass available for recreational fishing

saving an endangered species of turtle

finding natural ways to control the mosquito population

10.

1 point

Tamara uses sticks and balloons to show how bones and muscles move. She is using a

model.

hypothesis.

variable.

theory.

11.

1 point

Directions: Use Figure 3 from the Reference Sheet to answer the following question.

What is the volume of the liquid in the graduated cylinder?

59 square milliliters

59 cubic inches

59 milliliters

59 centimeters

12.

1 point

What part of a scientific experiment is the hypothesis?

the manipulated variable

the experimental results

a testable explanation to a question

the operational definition

13.

1 point

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

theory.

variable.

hypothesis.

law.

14.

1 point

Which of the following best explains how a scientific theory might be changed?

All scientists agree to change the theory.

Several scientists propose a new theory.

Data from new experiments could lead to revisions of the theory.

Theories do not change because they are based on well-tested hypotheses.

15.

1 point

Directions: Use Figure 4 from the Diagram Sheet to answer the following question.

According to the diagram, metamorphic rock can form from ______________.

igneous rock only.

igneous rock or sedimentary rock.

sedimentary rock only.

magma

16.

1 point

Which part of an organism is most likely to become a fossil?

bones

skin

sense organs

internal organs

17.

1 point

If two organisms look very similar during their early stages of development, this may be evidence that the organisms _____________________________.

are not related.

have exactly the same DNA.

evolved from different ancestors.

evolved from a common ancestor.

18.

1 point

Mutualism is one type of interaction between species. Which statement best describes mutualism between two species?

Both species are harmed by the relationship.

One species benefits while the other is not affected.

One species benefits while the other species is harmed.

Both species benefit from the relationship.

19.

1 point

Directions: Use Figure 5 from the Diagram Sheet to answer the following question.

What interaction does the graph represent between the wolf and the deer?

competition

predation

commensalism

mutualism

20.

1 point

When water freezes, it undergoes __________________________.

vaporization.

a physical change.

a chemical change.

sublimation.

21.

1 point

Which of these properties of an iron nail is a physical property?

does not burn when a flame is applied

rusts

composed of only one piece instead of fragments

reacts with hydrochloric acid to release hydrogen gas

22.

1 point

Which of the following examples in nature represents a chemical change?

a tree branch breaking

water freezing in a pond

steam rising from pavement

a tree burning after a lightning strike

23.

1 point

The only definite evidence of a chemical reaction is _____________________.

the formation of a gas.

changes in properties.

a color change.

the production of new substances.

24.

1 point

The chemical formula for a molecule of sulfuric acid is H2SO4. How many different elements make up the compound sulfuric acid?

7

2

3

6

25.

1 point

In which of the following ecosystems would you expect to find the greatest biodiversity?

a temperate forest

a desert preserve

a coral reef

a large city park

26.

1 point

A fossil that forms when hardened minerals replace all or part of an organism is called a _____________________.

mold.

trace fossil.

petrified fossil.

carbon film fossil.

27.

1 point

Rachel Carson was a biologist whose work led to the pesticide DDT being
banned by the government in 1972. How did Carson convince the government to ban DDT?

She used data to show that DDT harmed animals.

She led debates in Congress about pesticide use.

She wrote books about pesticide use in farming.

She developed a theory that DDT might harm animals.

28.

1 point

Rock that forms when magma cools below the Earth’s surface is called

igneous rock.

petroleum.

coal.

metamorphic rock.

29.

1 point

The atoms in a solid ______________________.

have more kinetic energy than those in a gas.

are far apart.

move around freely.

do not move easily.

30.

1 point

Rock that forms when magma cools below the earth's surface is called

Igneous rock

Metamorphic Rock

Sedimentary rock

Hard rock